Exposure to arsenic has been linked to a variety of adverse human health effects, including skin lesions; skin, lung, and bladder cancer; vascular diseases; low birth weight; and potentially diabetes mellitus and increased susceptibility to infection [1-3]. Although human exposure to the more toxic, inorganic forms of arsenic is thought to occur primarily through drinking water [3, 4], elevated concentrations of arsenic in certain foods may pose an additional risk to consumers (e.g., [2]). Foods with particularly high total arsenic concentrations include fish and seafood [5-9]; cereals and cereal products, particularly rice and rice-based products [5-7, 10, 11]; and bran and germ [2]. Using diet data and physiological models to estimate total arsenic exposure, Xue et al. [12] found that fruits and fruit juices, vegetables, and beer and wine also can be important sources of dietary arsenic; more recent studies document high arsenic concentrations in cruciferous vegetables in particular [13]. ...

In 2013 FSANZ released a survey on the levels of inorganic arsenic in a range of seaweed types and products containing seaweed, available in Australia.. The levels in most seaweed tested were below the regulatory limit for inorganic arsenic, with the exception of one hijiki seaweed sample. Because this sample was made up of two individual samples of the same brand of hijiki it may not be representative of all hijiki seaweed available for sale in Australia. Hijiki seaweed is also tested at the border for inorganic arsenic and compliance rates are high.. The New Zealand Ministry for Primary Industries (MPI) has also conducted tests on levels of arsenic in imported hijiki products and found some levels exceeding the regulatory limit for inorganic arsenic.. Using the information collected on the levels of inorganic arsenic in seaweed, dietary exposure to inorganic arsenic was estimated for the Australian population. Using the median inorganic arsenic concentrations in seaweed, the contribution of ...

Background: Dietary factors such as folate, vitamin B12, protein, and methionine are important for the excretion of arsenic via one-carbon metabolism in undernourished populations exposed to high levels of arsenic via drinking water. However, the effects of dietary factors on toenail arsenic concentrations in well-nourished populations exposed to relatively low levels of water arsenic are unknown. Methods: As part of a population-based case-control study of skin and bladder cancer from the USA, we evaluated relationships between consumption of dietary factors and arsenic concentrations in toenail clippings. Consumption of each dietary factor was determined from a validated food frequency questionnaire. We used general linear models to examine the associations between toenail arsenic and each dietary factor, taking into account potentially confounding effects.

The relation of mining and smelting exposure to arsenic and lung cancer was studied among tin miners in Yunnan Province in the Peoples Republic of China. Interviews were conducted in 1985 with 107 living tin miners who had lung cancer and an equal number of age matched controls from among tin miners without lung cancer to obtain information on risk factors for lung cancer including detailed history of employment and tobacco use. Occupational history was combined with industrial hygiene data to estimate cumulative arsenic exposure. Similar methods were also used to estimate radon exposure for simultaneous evaluation in this analysis. The results indicate that subjects in the highest quarter of cumulative arsenic exposure have a relative risk of 22.6 compared with subjects without exposure after adjusting for tobacco and radon exposure, and a positive dose response relation was observed. Simultaneous evaluation of arsenic and tobacco exposure indicates a greater risk for arsenic, whereas ...

The influence of ethylenediaminetetraacetic acid (EDTA) and chemical species on arsenic accumulation in aquatic floating macrophyte Spirodela polyrhiza L. (duckweed) was investigated. The uptake of inorganic arsenic species (arsenate; As(V) and arsenite; As(III)) into the plant tissue and their adsorption on iron plaque of plant surfaces were significantly (p,0.05) higher than those of organic species (monomethylarsonic acid (MMAA) and dimethylarsinic acid (DMAA)). The addition of EDTA to the culture media increased the uptake of As(V) and As(III) into the plant tissue though the MMAA and DMAA uptake were not affected. About 46% of the inorganic arsenic species were desorbed or mobilized from iron plaque by EDTA. Desorption of organic arsenic species was not affected by EDTA addition because the co-precipitation occurs only with inorganic species. Phosphate uptake was not affected by EDTA though its concentration in citrate-bicarbonate-EDTA (CBE)-extract was much higher than that of plant ...

Arsenic exposure through drinking water is an established lung carcinogen. Evidence on non-malignant lung outcomes is less conclusive and suggests arsenic is associated with lower lung function. Studies examining low-moderate arsenic (| 50 μg/L), the level relevant for most populations, are limited. We evaluated the association of arsenic exposure with respiratory health in American Indians from the Northern Plains, the Southern Plains and the Southwest United States, communities with environmental exposure to inorganic arsenic through drinking water. The Strong Heart Study is a prospective study of American Indian adults. This analysis used urinary arsenic measurements at baseline (1989-1991) and spirometry at Visit 2 (1993-1995) from 2132 participants to evaluate associations of arsenic exposure with airflow obstruction, restrictive pattern, self-reported respiratory disease, and symptoms. Airflow obstruction was present in 21.5% and restrictive pattern was present in 14.4%. The odds ratio (95%

Arsenic is one of the toxic trace elements in coals, which is harmful to both the ecological environment and human health. Based on published literature and the data obtained by our research group, a total of 5314 As concentrations of Chinese coals were analyzed. The arithmetic mean of arsenic content in Chinese coals is 6.97 mg/kg. Choosing the percentage of provincial coal resources in national coal resources as the weighting factor, the weighted average of arsenic content in Chinese coals is 5.33 mg/kg. The content of arsenic in Chinese coals increases from the north to the south. High arsenic content in coal primarily occurs in southwestern Yunnan and certain coalfields in the Guizhou Province. Additionally, arsenic is enriched in the coals from some regions, i.e., the western Yunnan, Guangxi, Tibet, southwestern Liaoning, Jilin, and Henan. The arsenic content in coals of different coal-forming periods shows an overall regularity: Paleogene and Neogene > Late Triassic > Late Permian > Late

Groundwater samples, taken from 73 wells in 10 counties of southeast Michigan in 1997 had arsenic concentrations in the range of 0.5 to 278 μg/l, the average being 29 μg/l. About 12% of these wells had arsenic concentrations that exceeded the current USEPAs maximum contaminant level of 50 μg/l. Most (53-98%) of the arsenic detected was arsenite [As(III)] and other observations supported the arsenic species distribution (low redox potential and DO). In shallow groundwater (15 m), the concentration of arsenic is possibly controlled by reductive dissolution of arsenic-rich iron hydroxide/oxyhydroxide and dissolution of arsenic sulfide minerals....

Banks and Salt found that the protein encoded by this gene ends up in the membrane of the plant cells vacuole. Salt said the protein acts as a pump, moving arsenic into the cells equivalent of a trashcan.. It stores it away from the cytoplasm so that it cant have an effect on the plant, Salt said.. Banks said understanding how the Pteris vittata functions with arsenic could lead to ways to clean up arsenic-contaminated land.. Potentially you could take these genes and put them in any organism that could suck the arsenic out of the soil, Banks said.. Salt said rice plants could be modified with the gene to store arsenic in the roots of plants - instead of rice grains - in contaminated paddies.. Banks and Salt found another gene in Pteris vittata that looks almost exactly the same as the one that controls arsenic tolerance. When the fern was exposed to arsenic, the confirmed arsenic-tolerance gene increased its expression while the similar gene did not.. Salt said the gene that regulates ...

Background|br /|Arsenic is present in numerous ecosystems and microorganisms have developed various mechanisms to live in such hostile environments. Herminiimonas arsenicoxydans, a bacterium isolated from arsenic contaminated sludge, has acquired remarkable capabilities to cope with arsenic. In particular our previous studies have suggested the existence of a temporal induction of arsenite oxidase, a key enzyme in arsenic metabolism, in the presence of As(III).|br /|Results|br /|Microarrays were designed to compare gene transcription profiles under a temporal As(III) exposure. Transcriptome kinetic analysis demonstrated the existence of two phases in arsenic response. The expression of approximatively 14% of the whole genome was significantly affected by an As(III) early stress and 4% by an As(III) late exposure. The early response was characterized by arsenic resistance, oxidative stress, chaperone synthesis and sulfur metabolism. The late response was characterized by arsenic metabolism and associated

Effective and affordable arsenic removal from drinking water has become a significant issue recently. The United States Environmental Protection Agency (EPA) has promulgated a new maximum contaminant level (MCL) for arsenic in drinking water which will take effect in January 2004. The current arsenic MCL of 50 micrograms per liter (ugll) was set by the United sates Public Health Service in 1943 and has not been reduced in nearly 60 years. Arsenic has been linked to various types of cancers, prompting EPA to change the standard. Due to the fact many water systems, especially small water utilities serving less than 10,000 people, will be impacted by a reduced standard much research is currently being done to fmd treatment technologies affordable enough for small water systems to implement and maintain. Many small water utilities lack the financial and technical resources required to construct and maintain centrally located water treatment facilities capable of removing arsenic. For this reason, many small

Bioaccessibility tests and mineralogical analyses were performed on arsenic-contaminated tailings and soils from gold mine districts of Nova Scotia, Canada, to examine the links between soil composition, mineralogy, and arsenic bioaccessibility. Arsenic bioaccessibility ranges from 0.1% to 49%. A weak correlation was observed between total and bioaccessible arsenic concentrations, and the arsenic bioaccessibility was not correlated with other elements. Bulk X-ray absorption near-edge structure analysis shows arsenic in these near-surface samples is mainly in the pentavalent form, indicating that most of the arsenopyrite (As1−) originally present in the tailings and soils has been oxidized during weathering reactions. Detailed mineralogical analyses of individual samples have identified up to seven arsenic species, the relative proportions of which appear to affect arsenic bioaccessibility. The highest arsenic bioaccessibility (up to 49%) is associated with the presence of calcium−iron ...

TY - JOUR. T1 - Indigenous American Ancestry is Associated with arsenic methylation efficiency in an admixed population of northwest Mexico. AU - Gomez-Rubio, Paulina. AU - Klimentidis, Yann C.. AU - Cantu-Soto, Ernesto. AU - Meza-Montenegro, Maria M.. AU - Billheimer, Dean. AU - Lu, Zhenqiang. AU - Chen, Zhao. AU - Klimecki, Walter T.. N1 - Funding Information: Received 27 May 2011; accepted 1 August 2011. The authors acknowledge Michael Kopplin for performing the arsenic speciation analyses. P.G.-R. was supported by a fellowship from the Mexican National Council for Science and Technology (CONACyT) under the UA-CONACyT partnership. This study was supported by the NIEHS Superfund Basic Research Program (ES04940) and a NIEHS Center Grant (ES006694). Address correspondence to Walter T. Klimecki, DVM, PhD, 1657 E Helen St, RM319, Thomas Keating Bldg. Tucson, AZ 85721, USA. E-mail: [email protected]. PY - 2012. Y1 - 2012. N2 - Many studies provide evidence relating lower human arsenic ...

TY - JOUR. T1 - Groundwater arsenic contamination and associated health risks in Bihar, India. AU - Singh, S. K.. AU - Ghosh, A. K.. AU - Kumar, A.. AU - Kislay, K.. AU - Kumar, C.. AU - Tiwari, R. R.. AU - Parwez, R.. AU - Kumar, N.. AU - Imam, M. D.. PY - 2014/3/7. Y1 - 2014/3/7. N2 - The extent of groundwater arsenic (As) contamination and associated health-risks were studied in the four villages: Chaukia and Terahrasiya (Vaishali); Mamalkha and Masharu (Bhagalpur) in Bihar, India. Groundwater samples were tested using the standard Silverdiethyledithiocarbamate method at 520nm by Thermo UV-1 spectrophotometer. The As levels in both the districts exceeded the WHO standard of 10μg/L for drinking water with a maximum value of 20μg/L in Vaishali and 143μg/L in Bhagalpur. However, the FAO standard of 100μg/L of As for irrigation water was only exceeded in Bhagalpur. The calculated range of the hazard index (HI) for Vaishali was 0.9 to 10, and for Bhagalpur was 10.40 to 40.47. Both ranges ...

It is reported by the wall street journal that in the recent study conducted it is found that 100 broiler chickens have inorganic arsenic at huge levels in the livers. These chickens were treated with 3-Nitro of Pfizer. Thus, the sale and of 3-Nitro was stopped in July and another treatment was suggested for the chickens.. The products with high arsenic were called back from all the stores in US and FDA assets that the chicken consists of arsenic at the safer level and is not dangerous for health anymore.. The production industry of meat wants to hide the truth about the adverse impact of arsenic on the human health. The combination of arsenic, lead and mercury are highly toxic effect on children and fetuses. This fact is backed by the study conducted by the University of South Carolina Department of Environmental Health Services.. The toxic level of arsenic is very high and considered as 4 times more toxic than mercury. The Journal of the American Medical Association has published a study which ...

The technique was evaluated for decomposing biological st … Curatola CJ, Grunder FI, Moffitt AE Jr. A modified hydride generation, atomic absorption spectrophotometric (AAS) method for the analysis of total arsenic in hair has been developed to evaluate occupational exposures to arsenic. Hydride Generation Atomic Absorption Spectrometry is divided into two parts, with the theoretical background and experimental approach covered in Part I. Hydride Generation AAS nptelhrd Loading... Atomic Absorption Spectroscopy/Atomic Absorption Spectrometry/AAS - Duration: … selenium determination by hydride generation atomic absorption spectrophotometry (HG-AAS) in full blood, blood plasma and serum, the liver, skeletal muscle tissue, the myocardium, and the kidneys after wet mineralization of samples in a closed nitric acid and hydrogen peroxide system Electrochemical hydride generation (EcHG) as a sample introduction system for determination of zinc was developed. Change to nitrous oxide/acetylene flame. ...

Until recently, chicken producers would routinely supplement poultry feed with a growth-promoting arsenical drug called roxarsone, which also treats intestinal parasites in the birds and gives their meat an appealing pink color. A study in this issue of EHP shows that inorganic arsenic (iAs) accumulates in the breast meat of broiler chickens, potentially as a result of treatment with roxarsone. In 2011 the U.S. Food and Drug Administration (FDA) found that the livers of roxarsone-treated chickens had elevated levels of iAs, a known human carcinogen. In response, roxarsones manufacturer, Pfizer, voluntarily pulled the drug off the U.S. market, although it is still sold overseas, and a similar arsenical drug is still available in the United States. Sampling for the new study took place between December 2010 and June 2011, before Pfizer withdrew roxarsone from the U.S. market. Roxarsone is an organic form of arsenic, which although less toxic to humans than the inorganic species implicated in cancer, has

Intake of certain dietary fats decreases toenail arsenic levels. However, the presence of long chain n-3 fatty acids in the diet corresponds with higher arsenic concentration in toenails.

Theres good news today for parents who give their kids apple juice: The U.S. Food and Drug Administration has announced new draft guidelines that call for no more than 10 parts per billion of inorganic arsenic in apple juice - roughly the same level allowed in tap water.. Although some apple juices have tested high for arsenic, all 95 samples tested by the FDA already fell within the 10 ppb - reassurance that when it comes to arsenic levels, apple juice is safe.. The most important message is we are confident in the safety of our juice supply, said FDA Commissioner Dr. Margaret Hamburg.. Pressure to develop the guidelines stemmed from a 2011 report on the Dr. Oz Show and arsenic testing by Consumer Reports, both of which raised questions about the safety of apple juice.. Arsenic and Apple Juice: New Testing Finds Low Levels In response, the FDA undertook additional testing and commissioned a risk assessment study to determine an arsenic limit based on the amount of juice a child might drink ...

Search Indian Sodium Arsenate Manufacturers and Suppliers Details - Contact to Sodium Arsenate Exporters in India, Sodium Arsenate Wholesalers, Sodium Arsenate Distributors and Traders from India.

Groundwater in Eastern Croatia contains elevated concentrations of inorganic arsenic. The biggest well field in the area has an average arsenic concentration of 200 μg/L and it supplies the population of around 200,000 people with drinking water. Croatian Regulation has adopted guidelines from the European Council Directive for the maximum concentration limit (MCL) of 10 μg/L of As in drinking water. However, it has been estimated that almost 120,000 people drink water from that well field with a concentration of arsenic over 10 μg/L. To reduce the health risks associated with arseniccontaminated water intake in Eastern Croatia it is important to develop proper strategies that will use one of the following technologies for arsenic removal: oxidation, coagulation-flocculation, adsorption, ion exchange or membrane technologies ...

This summary is derived from an article in Food Production Daily, April 13, 2006 http://www.foodproductiondaily.com and other identified sources (UPC editor). The Institute for Agriculture and Trade Policy (IATP) reports that arsenic in chicken meat appears closely linked to the decades-old industry practice of putting arsenic into chicken feed to speed the birds growth artificially. At least 70 percent of US broiler chickens have been fed arsenic, according to IATP estimates. Minneapolis, Minnesota-based IATP tested 155 samples from raw supermarket chicken products and found that 55 percent carried detectable arsenic. Arsenic was more than twice as prevalent in conventional brands of supermarket chicken as in certified organic and other premium brands. All 90 fast food chicken products tested by IATP also contained detectable arsenic. Chicken products were purchased from supermarkets and fast food outlets in Minnesota and California and analyzed for arsenic by a private, independent ...

A process is provided for separation of at least one metal sulfide from a mixed sulfide concentrate. The process may comprise: subjecting the mixed sulfide concentrate to flotation in which at least one sulfide comprising antimony, arsenic and a first metal is floated and at least one sulfide comprising a second metal is depressed. The flotation yields a first metal concentrate having the at least one sulfide comprising antimony, arsenic and the first metal and a second metal concentrate having the at least one sulfide comprising the second metal. The first metal concentrate is leached to yield a further concentrate and a leach solution. The further concentrate comprises the first metal and the leach solution comprises soluble antimony and soluble arsenic. The process may further comprise oxidizing the leach solution to yield an antimony precipitate and an arsenic solution, and forming a stable arsenic compound from the arsenic solution.

Stock Photo 4128R-18191: Download Arsenic trioxide, molecular model. Precursor to arsenic compounds, including organoarsenic compounds. Atoms are represented as spheres and are colour_coded: arsenic violet and oxygen red. Stock Photos. Search over 12 million royalty free images and rights managed stock photography

Arsenic in marine oils is mainly present in the form of lipid-soluble compounds; collectively called arsenolipids. Although total arsenic concentrations in marine oils typically range from 0.2 to 16 mg kg-1 [1-3], knowledge regarding the chemical structures and distribution of arsenolipids in oils is limited. The present work describes the development of analytical methods for the determination of arsenolipids, and their application to marine oil, including fish oil and oil of liver of Northeast Arctic cod (Gadus morhua).. In the present work gas chromatography coupled to inductively coupled plasma mass spectrometry (GC-ICP-MS) was applied for analysing arsenic-containing hydrocarbons (AsHCs) in fish oil. The AsHCs were extracted into aqueous methanol, and further subjected to solid-phase extraction (SPE) prior to analysis. Reversedphase HPLC-ICP-MS was applied as an analytical technique for analysis of both AsHCs and arsenic-containing fatty acids (AsFAs) in methanol phase of marine oil. The ...

Problem: Until the early 2000s, most of the pressure-treated wood used in the United States for outdoor structures such as playground equipment, picnic tables, benches and decks was treated with the preservative, Chromated Copper Arsenate (CCA). This chemical was the primary preservative used in the pressure-treating process to protect wood against weather, mold and insects. Studies show that CCA-treated wood is continually leaching (releasing) arsenic to the surface of the wood. Arsenic is known to cause cancer in humans: it is a potent skin, bladder and lung carcinogen. Arsenic is also linked to liver and kidney cancer, immune system suppression, increased risk of high blood pressure, cardiovascular disease, endocrine disruption (altering normal hormone levels or activity in the body) and diabetes. Studies have confirmed that high levels of arsenic can be released onto childrens hands by direct contact with arsenic-treated wood. Young children, in particular, are at risk of ingesting ...

Looking for online definition of Arsenic hydride in the Medical Dictionary? Arsenic hydride explanation free. What is Arsenic hydride? Meaning of Arsenic hydride medical term. What does Arsenic hydride mean?

Arsenobetaine, arsenocholine, monomethylarsonic acid, dimethylarsinic acid, arsenous (III) acid, arsenic (V) acid. The concentration of speciated arsenics is determined by using high performance liquid chromatography (HPLC) to separate the species coupled to an ICP-DRC-MS to detect the arsenic species. This analytical technique is based on separation by anion-exchange chromatography (IC), followed by detection using quadrupole ICP-MS technology, and includes DRC™ technology (Baranov VI et al., 1999), which minimizes or eliminates many argon-based polyatomic interferences (Tanner S et al., 2000) will require 0.5 mL of urine. Arsenic species column separation is largely achieved due to differences in charge-charge interactions of each negatively-charged arsenic component in the mobile phase, with the positively-charged quaternary ammonium groups bound at the columns solid-liquid interface. Upon exit from the column, the chromatographic eluent goes through a nebulizer, where it is converted into ...

Samples of the edible mushroom Laccaria amethystina, which is known to accumulate arsenic, were collected from two uncontaminated beech forests and an arsenic-contaminated one in Denmark. The total arsenic concentration was 23 and 77 mug As g-1 dry weight in the two uncontaminated samples and 1420 mug As g-1 in the contaminated sample. The...

Arsenic has been found in at least 781 of 1,300 National Priorities List sites (hazardous waste sites) identified by the U.S. Environmental Protection Agency. A release from an industrial plant, or from a container, does not always lead to exposure. You can be exposed to a chemical only when you come into contact with it. Exposures occur through breathing, eating, or drinking substances containing the chemical, or from skin contact with it. If you are exposed to arsenic, the appearance of symptoms and their seriousness is dependent upon how much, how long and by what way you were exposed. Your sex, age, lifestyle and state of health also contribute. What is arsenic?. Arsenic is a naturally occurring gray metal-like material found in the environment combined with other elements. Most of these combined compounds are white or colorless powders that do not evaporate. They have no smell, and most have no special taste, so you cannot tell if arsenic is present in your food, water, or air. Arsenic is ...

Arsenic and fluoride are major contaminants of drinking water. Mechanisms of toxicity following individual exposure to arsenic or fluoride are well known. However, it is not explicit how combined exposure to arsenic and fluoride leads to cellular and/or DNA damage. The present study was planned to assess (i) oxidative stress during combined chronic exposure to arsenic and fluoride in drinking water, (ii) correlation of oxidative stress with cellular and DNA damage and (iii) mechanism of cellular damage using IR spectroscopy. Mice were exposed to arsenic and fluoride (50 ppm) either individually or in combination for 28 weeks. Arsenic or fluoride exposure individually led to a significant increase in reactive oxygen species (ROS) generation and associated oxidative stress in blood, liver and brain. Individual exposure to the two toxicants showed significant depletion of blood glutathione (GSH) and glucose 6-phosphate dehydrogenase (G6PD) activity, and single-stranded DNA damage using a comet ...

In the present study, CeO2/Fe2O3 nanocomposite was prepared by co-precipitation method and its application was investigated for arsenic removal from water. Characterization of the nano sized adsorbent particles was carried out using SEM and XRD techniques. Systemic adsorption experiments were performed in batch systems and the optimum conditions were obtained. The effects of pH, contact time, adsorbent mass, temperature, ionic strength and initial concentration of arsenic were investigated on kinetics and equilibrium of the adsorption. Thermodynamic parameters and adsorption kinetics were studied in detailed to know the nature and mechanism of adsorption. Kinetic studies showed that the adsorption process followed pseudo second order kinetic model. The thermodynamic parameters such as ΔG⁰, ΔS⁰ and ΔH⁰ were calculated, and it was found that the reaction was spontaneous and exothermic in nature. Adsorption equilibrium was studied using Langmuir and Freundlich isotherm models. It was observed

Arsenic is toxic to most forms of life, and occurs naturally in soil and ground water in many regions of the world. Chronic exposure to arsenic has been linked to lung, bladder and kidney cancer, and thus there are strict limits on allowable levels or arsenic in drinking water. Chemically similar to phosphorus, arsenic forms arsenate (AsO43-), which closely resembles phosphate (PO43-). Arsenate interferes with many phosphate-requiring metabolic reactions, including synthesis of adenosine triphosphate (ATP), a ubiquitous and essential source of cellular energy. Thus, exposure to even low levels of arsenic can be extremely toxic.

Pilot study indicates that dogs eating rice-based dry dog foods could be at risk for chronic arsenic exposure. Rice-consumption is considered a risk factor for chronic arsenic toxicity in humans. A pilot study conducted within the DogRisk research group at the University of Helsinki found that dogs eating rice-based dry dog foods had higher hair arsenic levels than dogs whose diet did not contain rice. The study compared hair arsenic levels from seven dogs that were eating rice-based (having rice as first or second ingredient) dry dog foods and nine dogs whose diet did not contain any rice. All dogs were of the breed Staffordshire bull terrier and had been eating their diets for a minimum of one year prior to the study.. - Considering that dogs often eat the same food daily for long periods of time, sometimes even their whole lives, we need to acknowledge the risk for long-term accumulation of contaminants such as toxic metals. Arsenic is widespread in the environment and accumulates especially ...

D4606 - 15 Standard Test Method for Determination of Arsenic and Selenium in Coal by the Hydride Generation/Atomic Absorption Method , arsenic, atomic absorption, Eschka mixture, hydride generation, selenium ,,

Hundreds of millions of people world-wide are exposed to unacceptable levels of arsenic in drinking water. This is a public health crisis because arsenic is a Group I (proven) human carcinogen. Human cells methylate arsenic to monomethylarsonous acid (MMAIII), monomethylarsonic acid (MMAV), dimethylarsinous acid (DMAIII), and dimethylarsinic acid (DMAV). Although the liver is the predominant site for arsenic methylation, elimination occurs mostly in urine. The protein(s) responsible for transport of arsenic from the liver (into blood), ultimately for urinary elimination are unknown. Human multidrug resistance protein 1 (MRP1/ABCC1) and MRP2 (ABCC2), are established arsenic efflux pumps, but unlike the related MRP4 (ABCC4), are not present at the basolateral membrane of hepatocytes. MRP4 is also found at the apical membrane of renal proximal tubule cells making it an ideal candidate for urinary arsenic elimination. In the current study, human MRP4 expressed in HEK293 cells reduced the ...

Arsenic is one of the most ubiquitous toxins and endangers the health of tens of millions of humans worldwide. It is a mainly a water-borne contaminant. Inorganic trivalent arsenic (AsIII) is one of the major species that exists environmentally. The transport of AsIII has been studied in microbes, plants and mammals. Members of the aquaglyceroporin family have been shown to actively conduct AsIII and its organic metabolite, monomethylarsenite (MAsIII). However, the transport of AsIII and MAsIII in in any fish species has not been characterized. In this study, five members of the aquaglyceroporin family from zebrafish (Danio rerio) were cloned, and their ability to transport water, glycerol, and trivalent arsenicals (AsIII and MAsIII) and antimonite (SbIII) was investigated. Genes for at least seven aquaglyceroporins have been annotated in the zebrafish genome project. Here, five genes which are close homologues to human AQP3, AQP9 and AQP10 were cloned from a zebrafish cDNA preparation. These genes were

Mt Sinai School of Medicine Dr Samuel] Waxman was one of the first Western physicians to see promise in the a series of small studies in Chinese medical journals that reported intravenous doses of arsenic trioxide-induced long-term remission in APL [acute promyelocytic leukemia] patients. The medical uses of arsenic reach back at least 2,000 years, but it was political ideology that prompted its modern resurgence, Waxman explained.. Arsenic may never have entered the western pharmacopoeia were it not for the Chinese cultural revolution in the 1960s and 1970s, he said. During that time, Western medicine virtually disappeared in China, and physicians turned to traditional Chinese herbal cures that had sustained the culture for millennia. The Chinese physician Zhang Ting-Dong of Harbin Medical University made the initial breakthrough by formulating a stable, low-dose solution of 1% arsenic trioxide in injectable form. Zhang presented his work at a Chinese medical society meeting in the early 1980s ...

In this study, water stable zirconium metal-organic framework (UiO-66) has been synthesized and for the first time applied as an adsorbent to remove aquatic arsenic contamination. The as-synthesized UiO-66 adsorbent functions excellently across a broad pH range of 1 to 10, and achieves a remarkable arsenate uptake capacity of 303 mg/g at the optimal pH, i.e., pH = 2. To the best of our knowledge, this is the highest arsenate As(V) adsorption capacity ever reported, much higher than that of currently available adsorbents (5-280 mg/g, generally less than 100 mg/g). The superior arsenic uptake performance of UiO-66 adsorbent could be attributed to the highly porous crystalline structure containing zirconium oxide clusters, which provides a large contact area and plenty of active sites in unit space. Two binding sites within the adsorbent framework are proposed for arsenic species, i.e., hydroxyl group and benzenedicarboxylate ligand. At equilibrium, seven equivalent arsenic species can be captured by

Abraham M, McDougald L, Beckstead R. 2013. Blackhead disease: reduced sensitivity of Histomonas meleagridis to nitarsone in vitro and in vivo. Avian Dis 58(1):60-63.. Ahmad SA, Sayed MH, Barua S, Khan MH, Faruquee MH, Jalil A, et al. 2001. Arsenic in drinking water and pregnancy outcomes. Environ Health Perspect 109:629-631.. Alter v. Pfizer Inc. No. CV-2012-67. (Arkansas County Circuit Court, 24 September 2012). http://www.hwnn.com/images/stories/hwnn/​amended_complaint.pdf [accessed 28 October 2015].. Arai Y, Lanzirotti A, Sutton S, Davis JA, Sparks DL. 2003. Arsenic speciation and reactivity in poultry litter. Environ Sci Technol 37(18):4083-4090.. ATSDR (Agency for Toxic Substances and Disease Registry). 2007. Toxicological Profile for Arsenic. Atlanta, GA:ATSDR. http://www.atsdr.cdc.gov/ToxProfiles/tp2​.pdf [accessed 30 July 2015].. Aubrey A. 2013. How trace amounts of arsenic end up in grocery store meat. National Public Radio, The Salt, 16 May. ...

The naturally occurring aqueous Arsenic (As) and other toxic elements are found around the world. The present study concentrates on arsenic concentrations, speciation and related microbial diversity in a hydrothermal system in Western Turkey. The surface temperatures of hot springs reach up to 90°C and deep well (reservoir) temperatures vary in the range of 40 to 230°C. The elements such as As, B, Br, Ba, Cr, Fe, Mn, V and Zn are found in high concentration in hydrothermal waters. Hydrogeochemically, Seferihisar hot spring exhibited a Na-Cl water type. On the other hand, Karahayit, Pamukkale, Emirfaki, Alaşehir and Sart exhibit a Ca-HCO 3 water type and Çitgöl exhibited a Na-HCO 3-SO 4 water type. The arsenic (As) concentrations in geothermal waters of Western Anatolia have been detected to range from 0.03 mg/L to 1.5 mg/L, including Buharkent (İnalti) (1.50 ± 0.005 mg/L), Kizildere (1.13 ± 0.005 mg/L), Eynal (0.71 ± 0.005 mg/L) and Sarayköy (0.06 ± 0.004 mg/L). Arsenic (III) is the ...

Ask the Expert Question-and-Answer Archive by Ron Joseph. February, 2009 Arsenic in Paint. Q. Is it possible to have paint tested for arsenic content? Are there any labs in southern California, for example, that might do this?. A.Wow! Why would anybody use arsenic in paint? Im sure you can have the paint tested, but why do you suspect arsenic ...

Press Release issued Mar 1, 2017: Global Market Study Evaluate on Arsenic Removal Industry by Type, Manufacturers, Application, Type, and Regions, Forecast up to 2022.

Arsenic removal from groundwaters containing iron, ammonium, manganese and phosphate: A case study from a treatment unit in northern ...

The SafeWork Australia (SWA) Hazardous Chemicals Information System (HCIS) Consolidated List of Substances includes arsenic, arsenic acid and its salts, arsenic compounds and arsine and these substances are therefore regulated under Part 4 of the consolidated Victorian Occupational Health and Safety Regulations (2017). Employers must, by law, implement these regulations, which means they must first try to eliminate the hazard or the risks associated with the hazard. If this is not practicable, then the employer must reduce the risk, according to the preferred order of hazard control - that is by beginning at the source.. Where, after taking all practicable measures to control the risk at the source, there is still a risk that workers may be exposed to arsenic, the employer must provide adequate information, training and where necessary, personal protective equipment.. The training employers must provide should include the following: personal hygiene and sanitation; the use of personal protective ...

Arsenic(III), As, monomethylarsonic acid (MMAA), dimethylarsinic acid (DMAA) and arsenobetaine (AsB) were separated by high-performance liquid chromatography (HPLC) and determined on-line by inductively coupled plasma mass spectrometry (ICP-MS). Two forms of HPLC were used: ion pairing and ion exchange, with absolu

Arsenic and cadmium are ranked among the top ten priority hazardous substances by the Agency for Toxic Substances and Disease Registry (ATSDR) [1]. Exposure to arsenic and cadmium can lead to adverse health outcomes such as lung and kidney cancers as well as cardiovascular disease and diabetes [2, 3]. Further, exposure to these two toxic and well-classified chemicals is of particular interest because of their extensive global impact [4-6]. For example, it is estimated that more than 40 million people worldwide drink water containing arsenic at concentrations that exceed the World Health Organization (WHO) and Environmental Protection Agency (EPA) drinking water guideline of 10 ppb [7]. Also, humans are exposed to low levels of cadmium through food consumption, typically ranging between 8 and 25 ug per day [3]. Smoking populations experience higher levels of cadmium exposure, as one cigarette may contain 1-2 ug cadmium [3].. Both arsenic and cadmium are classified as Group 1 carcinogens by the ...

The LGRD and Cooperatives Minister Abdul Mannan Bhuiyan directed Saturday to supply drinking water using pipes from deep tube wells on priority basis to every household in the country, including the arsenic affected areas, reports BSS.. He also stressed the need for supply of surface water after proper purification in the arsenic contaminated areas, an official press release said. The minister was addressing a presentation meeting on installation of deep tube wells in the arsenic affected areas in the conference room of the LGRD and Cooperatives Ministry in the city.. Bhuiyan directed the concerned officials to integrate officials and employees of the Public Health Engineering Department in installation of deep tube wells, examination of arsenic, maintenance and other activities.. Deputy Minister for LGRD and Cooperatives Advocate Ruhul Quddus Talukdar Dulu, Secretary of the Local Government Division AYBI Siddiqui were, among others, present on the occasion. - UNB. ...

AFP, Kathmandu. Millions of Nepalis are at risk from diseases caused by drinking water contaminated with the poison arsenic, doctors say. The problem is affecting the Terai lowlands, home to 47 percent of Nepals 22.3 million people. People are suffering from skin and other serious diseases due to drinking underground unfiltered water laced with arsenic in the Terai region, adjoining the Indian states of West Bengal, Bihar and Uttar Pradesh, said Roshan Man Shrestha, a doctor with the Public Health Concern Centre non-governmental organisation (NGO).. Some 90 percent of the people living in the region use the underground water pumped to the surface by shallow tubewells. A survey of Terais 20 districts from 1997-2001 by the Public Health Services NGO, along with experts from the UN childrens agency, UNICEF and the World Health Organisation (WHO), found the waters arsenic levels failed WHO standards.. Out of some 200,000 shallow tubewells constructed along the tropical region, tests on about ...

Arsenic is a chemical element that can be found naturally in rock formations and volcanic eruptions, but it also ends up in our soil as a result of arsenic-based pesticides. While these pesticides are now banned in the U.S., theyre still present in our soil and globally, theyre still used. Arsenic can also end up in our water supply, so in 1974, Congress passed the Safe Drinking Water Act to regulate its safety. Today, the maximum contaminant level (MCL) is 0.010 milligrams per Liter (mg/L) or 10 parts per billion (ppb). ...