AquifersSource of arsenicContamination in groundwaterMicrograms per literAlarming arsenic levelsDistribution of arsenicSedimentsLimiting arsenic concentrationsWest BengalFound in the groundwaterNaturallyContains high levels of arsenicConcentrations of arsenicNatural arsenicConcentration in groundwaterLong-term exposure to arsenicGeochemistryExposureBangladeshTotal arsenicOrganic and inorganicIron hydroxideExtremely high arsenic levelsRemediationContaminate groundwaterAnoxicOxidationSoilExtent of arsenicSurface water and groundwaterIndiaMobilization of arsenicCadmiumReleases arsenicShallow groundwaterDrinking WaterCompoundsLevel of arsenicHighWater for arsenicAmount of arsenicEffects of arsenicOccurrence of arsenicSoilsWorld Health OrganLevelsGangesMobilityInorganic arsenicPosesBedrockIrrigationCorrosion inhibitorsGeochemical conditions
Aquifers10
- However the context of arsenic-tainted deep aquifers turned a life-saving technology into a deadly one. (appropedia.org)
- A multi-disciplinary study, using integrated aspects of geology, groundwater geochemistry including carbon isotope geochemistry, scanning electron microscopy, energy dispersive spectroscopy, and geochemical modeling, reveals linked geochemical and microbial processes that cause natural arsenic-contamination of Holocene alluvial aquifers in Manikganj, Bangladesh. (auburn.edu)
- In order to better evaluate distribution of arsenic in the state's ground water, USGS, Pennsylvania Department of Health, and Pennsylvania Department of Environmental Protection began surveillance in 2005 to relate arsenic concentrations in major aquifers. (cdc.gov)
- Concentrations of arsenic exceeding the MCL of 10 micrograms per liter have been documented in groundwater aquifers throughout the glaciated Midwest. (inwmc.net)
- Now, why are arsenic levels much higher in the shallower Holocene age aquifers than in the deeper Pleistocene age aquifers? (thewire.in)
- Arsenic in groundwater is a serious problem in New England, particularly for domestic well owners drawing water from bedrock aquifers. (usgs.gov)
- Currently, no data is available on the dissolved phase/colloidal association of As in groundwater of alluvial aquifers in West Bengal, India. (bournemouth.ac.uk)
- The study examines the spatial variation of arsenic (As) level in groundwater of deep aquifers with respect to surface elevation, slope, and water-table, in Ballia, the eastern most districts of Uttar Pradesh. (stmjournals.com)
- The result shows inverse relationships between groundwater As, slopes and water-table in deep aquifers i.e. high As is found in areas of low surface elevation, low slopes, and low water-table in the district. (stmjournals.com)
- Even older wells finished in currently safe aquifers can be affected when steel well casing used in the well's construction corrodes and the casing develops small leaks that allows poor quality shallow groundwater to enter the well. (iowadnr.gov)
Source of arsenic10
- The ultimate source of arsenic in the groundwater are the high Himalayan rocks and the Indo-Burman ranges. (thewire.in)
- Important source of arsenic, like the Indus ophiolite belt and the high-grade gneisses, were covered in ice and couldn't release sediments. (thewire.in)
- Based on this hypothesis, the source of arsenic abundant groundwater is man-made, which is basically the latest trend. (chemistryfundamentals.com)
- Based on this hypothesis, the source of arsenic enriched groundwater is due to a natural method, and it may seem that the arsenic in groundwater has been present for thousands of years without being flushed from the delta. (chemistryfundamentals.com)
- Bedrock aquifer wells - often known as rock, deep, or artesian wells - are the most common type of well installed for homes in the region and it is the bedrock aquifer that is the primary source of arsenic in the locations where it is elevated, according to the findings. (thedriller.com)
- Although human sources may contribute arsenic to ground water, our results suggest that arsenic used as an agricultural pesticide over the past century is not a major source of arsenic in ground water today," Ayotte says. (thedriller.com)
- A thermally altered metamorphic zone in the Higher Himalaya, containing various types of minerals, is considered as the source of arsenic [2]. (scirp.org)
- Although, its natural sources are igneous and sedimentary rocks, the anthropogenic source of arsenic (As) plays an important role to maintain its concentration in our environment. (ijpsr.com)
- Diet alone can be a significant source of arsenic exposure regardless of arsenic concentrations in drinking and cooking water, a study finds. (sciencedaily.com)
- Household water is thought to be most significant source of arsenic exposure in regions where water arsenic concentrations are elevated. (sciencedaily.com)
Contamination in groundwater3
- Several studies have suggested that long-term exposure to arsenic contamination in groundwater increases the risk of developing bladder, kidney, liver, bronchus and lung, and prostate cancer. (cdc.gov)
- Presently, there are two well-known theories about the mechanism of arsenic contamination in groundwater. (chemistryfundamentals.com)
- Technology is inadequately assessed for effectiveness to reduce arsenic contamination in groundwater finds a new systematic review published in Environmental Evidence today. (biomedcentral.com)
Micrograms per liter6
- Arsenic levels are in micrograms per liter. (michiganradio.org)
- This is why in 2001, the U.S. Environmental Protection Agency (EPA) lowered the maximum contaminant level (MCL) for arsenic in drinking water from 50 to 10 micrograms per liter of water. (inwmc.net)
- The current federal standard for arsenic in public water supplies is 10 micrograms per liter. (thedriller.com)
- In New England, 12 percent of the area studied has a greater than 50 percent chance of having wells with arsenic concentrations above 5 micrograms per liter. (thedriller.com)
- Nearly one-quarter of the combined area studied in Maine and New Hampshire has a greater than 50 percent chance of having wells with arsenic at or above 5 micrograms per liter. (thedriller.com)
- The U.S. Environmental Protection Agency (USEPA) has ruled that the measure of arsenic concentration should be between 50 and 10 micrograms per liter. (studydaddy.com)
Alarming arsenic levels1
- Following Priyanka Pulla's excellent article in The Hindu about the alarming arsenic levels in the groundwater under West Bengal and Bangladesh, it's worth elaborating on the geology part of the story. (thewire.in)
Distribution of arsenic3
- Together with other factors, they changed the distribution of arsenic in the alluvial plains of Bengal. (thewire.in)
- The distribution of arsenic is also correlated with topography. (thewire.in)
- So, a change in climate and sea levels from the Pleistocene to the Holocene exerted strong control on the distribution of arsenic in the alluvial plains of Bangladesh and West Bengal. (thewire.in)
Sediments6
- water deeper than 100 meters is exposed to much older sediments which have already been depleted of arsenic. (wikipedia.org)
- However, when these sediments encounter organic-rich reducing conditions, the bacterial reduction of iron releases arsenic into groundwater. (thewire.in)
- Arsenic is thought to be present in alluvial sediments with higher concentrations in sand grains like a coating of iron hydroxide. (chemistryfundamentals.com)
- The organic matter deposited with the sediments decreases the arsenic containing iron hydroxide and delivers arsenic into groundwater. (chemistryfundamentals.com)
- We assessed the spatial distribution of 35 elements in aquifer sediments and groundwater of a crude-oil-contaminated aquifer and show evidence of the dissolution of barium (Ba), strontium (Sr), cobalt (Co), and nickel (Ni) during hydrocarbon oxidation coupled to historic microbial Fe(III)-reduction near the oil. (usgs.gov)
- Prior work has shown that injection of oxalic acid can substantially increase mobilization of arsenic from sediments at the Vineland Superfund site (from laboratory to pilot field scales), potentially showing a way to greatly enhance the pump and treatment (P&T) methodology currently in use there as well as at other sites. (nih.gov)
Limiting arsenic concentrations1
- The World Health Organization recommends limiting arsenic concentrations in water to 10 μg/L, although this is often an unattainable goal for many problem areas due to the difficult nature of removing arsenic from water sources. (wikipedia.org)
West Bengal2
- It is estimated that more than 25 million people in Bangladesh and West Bengal, India are consuming drinking water containing dangerous concentrations of arsenic. (auburn.edu)
- Arsenic pollution of groundwater in Ganges River basin, West Bengal, India, and Bangladesh is known for long. (scirp.org)
Found in the groundwater2
- High levels of arsenic have been found in the groundwater of an Emmett Charter Township neighborhood, and homeowners may have to pay up to $17,000 to fix it. (michiganradio.org)
- The above trend shows that a higher concentration of arsenic is found in the groundwater samples collected from the fluvial landforms as compared to those collected from structural landforms. (copernicus.org)
Naturally10
- Arsenic contamination of groundwater is a form of groundwater pollution which is often due to naturally occurring high concentrations of arsenic in deeper levels of groundwater. (wikipedia.org)
- Although it is for the most part naturally occurring, arsenic has been linked to several types of cancer. (inwmc.net)
- Members of the Groundwater Focus Committee have invested time collecting and analyzing water and sediment samples in an attempt to better understand the distribution and mobilization mechanisms of naturally occurring arsenic. (inwmc.net)
- According to Ayotte, this new study is consistent with other, recent studies that have suggested that arsenic is predominantly naturally occurring and related to the geology of the area. (thedriller.com)
- Groundwater here is affected by naturally occurring high iron (Fe2+) and As concentrations, while, in coastal regions, groundwater is additionally contaminated by high salinity mostly due to seawater intrusion. (edu.au)
- Arsenic (As) is a naturally occurring, mobilized toxic metalloid. (ijpsr.com)
- Radioactive substances occur naturally in groundwater. (cdc.gov)
- Arsenic also occurs naturally in the soil and groundwater in the area at levels higher than the national average. (cdc.gov)
- At places groundwater quality is deteriorating due to the naturally occurring subsoil contaminants or to anthropogenic activities. (who.int)
- greater than 5 g/cm3 which are found naturally on the Chronic exposure to arsenic by drinking groundwater earth in very small amounts. (who.int)
Contains high levels of arsenic2
- Some of these wells pull groundwater that contains high levels of arsenic. (cdc.gov)
- Health, and Pennsylvania Department one person to a doctor because of contains high levels of arsenic. (cdc.gov)
Concentrations of arsenic1
- The findings support recent studies that show high concentrations of arsenic in Brussels sprouts and related vegetables because arsenic binds to the sulfur-containing compounds that give them their characteristic odors. (sciencedaily.com)
Natural arsenic4
- The pit geochemical data are interpreted here as evidence that natural arsenic patterns have been modified to various degrees around the pits. (searchanddiscovery.com)
- Under the model's reducing conditions, adsorbed natural arsenic is released into solution when oxidized iron and manganese species are dissolved. (searchanddiscovery.com)
- Natural arsenic contamination in south Asia is considered to be the worst environmental crisis in the world. (auburn.edu)
- In Indiana, natural arsenic in groundwater is mobilized from its lithological hosts - typically either unconsolidated glacial materials or near-surface bedrock. (inwmc.net)
Concentration in groundwater1
- Arsenic concentration in groundwater samples from the three blocks viz. (org.in)
Long-term exposure to arsenic1
- The study also confirms that toenail clippings are a good biomarker of long-term exposure to arsenic from consuming alcohol, Brussels sprouts and dark meat fish. (sciencedaily.com)
Geochemistry2
- The presence and origin of arsenic in an oilfield region may be difficult to interpret given arsenic's multiple possible origins and complex geochemistry. (searchanddiscovery.com)
- The primary hypothesis of Chillrud's researchers is that they can overcome spatial heterogeneities in both hydraulic flow-paths and arsenic geochemistry to allow the oxalic acid approach to dramatically increase the efficiency of P&T. A series of aims focused on field, laboratory and modeling experiments is being carried out in partnership with U.S. Environmental Protection Agency & U.S. Army Corps of Engineers. (nih.gov)
Exposure11
- While this is an important perspective, it does not mean that the deep wells were a good decision - there may have been other more appropriate technologies , such as storage tanks and simple filters for surface water, that would have saved lives in the short term, without exposure to arsenic. (appropedia.org)
- The groundwater in 92 districts of 14 states is partially affected with lead, which can be harmful to human health even at low exposure levels, while the salinity of groundwater was above the permissible limits in 249 districts of 18 states, Minister of State for Jal Shakti, Bishveswar Tudu, told the Rajya Sabha. (bilkulonline.com)
- Its use could greatly reduce exposure to arsenic through drinking water for domestic use. (usgs.gov)
- Hypothetical numerical models were used to investigate the potential hydraulic performance of the new well design in reducing arsenic exposure. (usgs.gov)
- The main pathways to exposure to arsenic (As) are ingestion, inhalation and skin contact. (ijpsr.com)
- Exposure to arsenic has been linked to a variety of health problems, including cancer, vascular diseases and low birth weight. (sciencedaily.com)
- Previous studies have shown that diet can be an important source of total arsenic exposure, but the new study is the first to account for arsenic in drinking and cooking water before looking at dietary contribution. (sciencedaily.com)
- Exposure to arsenic has previously been associated with the development of various cancers including skin cancer. (sciencedaily.com)
- A resurgence of interest in arsenic as a medicinal agent for the treatment of acute promyelocytic leukemias, multiple myeloma, myelodysplastic syndromes, and assorted resistant solid tumors may potentially contribute to increases in arsenic exposure. (medscape.com)
- Clinical effects of arsenic toxicity depend on the chronicity of exposure (eg, acute, chronic) and the chemical form involved, which may be inorganic arsenic (pentavalent arsenic and trivalent arsenic), organic arsenicals, or arsine gas. (medscape.com)
- however, the authors commented on the greater sensitivity of blood than urine as a marker of indium exposure (in contrast to gallium and arsenic, the other metals evaluated). (who.int)
Bangladesh9
- Arsenic contamination of the groundwater in Bangladesh is a serious problem. (wikipedia.org)
- Development consultant and arsenic whisteblower Dipankar Chakraborti claims that arsenic removal plants (ARPs) installed in Bangladesh by UNDP and WHO were a colossal waste of funds due to breakdowns, inconvenient placements and lack of quality control. (appropedia.org)
- The arsenic contamination of Bangladesh groundwater involves heavy arsenic inputs to irrigated rice fields. (unito.it)
- The oxidation of arseno-pyrite could be the main mechanism for the ground water arsenic contamination in Bangladesh but there is not enough hydrological and geological data to validate the process completely. (chemistryfundamentals.com)
- The authors have elucidated the mechanism for arsenic contamination and developed the safe water devices in Bangladesh since 1997 together with the NGO "Asia Arsenic Network" (AAN) [9]. (scirp.org)
- AAN has implemented the Arsenic Mitigation Project with Japan International Cooperation Agency (JICA) in Bangladesh from 1999 until now. (scirp.org)
- As a demonstration, where a rainwater cistern of 3.2 m 3 volume in Bangladesh provides rainwater for periods of approximately 16 days of the year, groundwater at 0.091 mg/L arsenic for the remainder of the year, provides the equivalent body burden arising from groundwater at the interim drinking water guideline of arsenic concentration of 0.050 mg/L for 365 days of the year. (actapress.com)
- The observed arsenic (As) levels in the drinking water often exceed the WHO standard guideline (10 μg/l) in more than 42 nations including China, Australia, Cambodia, Vietnam, Bangladesh and India. (ijpsr.com)
- Modeling regional-scale groundwater arsenic hazard in the transboundary Ganges River Delta, India and Bangladesh: Infusing physically-based model with machine learning. (cdc.gov)
Total arsenic1
Organic and inorganic1
- This study investigated the fractional distribution of As (and other metals/metalloids) among the particulate, colloidal and dissolved phases in groundwater to decipher controlling behavior of organic and inorganic colloids on As mobility. (bournemouth.ac.uk)
Iron hydroxide4
- The conditions were oxidising and so the arsenic remained sequestered in iron hydroxide minerals. (thewire.in)
- Owing to the dropping of water table below deposits, arseno-pyrite oxidized in the vadose zone gives out arsenic as arsenic adsorbed on iron hydroxide. (chemistryfundamentals.com)
- While the subsequence recharge span, iron hydroxide delivers arsenic into groundwater. (chemistryfundamentals.com)
- The microbial degradation of organic matter generates the reducing environment and facilitates the dissolution of iron hydroxide thus releasing the adsorbed arsenic into the groundwater. (copernicus.org)
Extremely high arsenic levels2
Remediation4
- Advanced environment-friendly and economical remediation technologies are in high demand for effective removal of As from contaminated groundwater. (confex.com)
- The objective of this study was to demonstrate feasibility and technical effectiveness of ferrate [Fe(VI)] - an emerging "green" oxidant - for remediation of As-contaminated groundwater and aquifer materials in a pilot scale tank reactor under flow through conditions. (confex.com)
- Drawing on our staff's golf course remediation expertise, Apex conducted groundwater monitoring, site assessment, and developed a conceptual site model remedial design to determine arsenic contamination within and outside of property boundaries-the areas of the site that were most likely to have elevated levels of arsenic in soil and groundwater. (apexcos.com)
- State agencies have differing guidelines and standards for risk assessment and remediation of sites affected by arsenic. (lsu.edu)
Contaminate groundwater2
- Gold mining can contaminate groundwater with arsenic, because the element typically occurs in gold-containing ores. (wikipedia.org)
- Some studies have associated arsenic concentrations in New England with an anthropogenic source such as treated lumber, the use of pesticides, and wastes from manufacturing industries, which contaminate groundwater (D'Angelo 3). (studydaddy.com)
Anoxic2
- The groundwater native-Fe 2+ (2.33±0.03 mg/L) removed 61% of As in the oxic system (storage-aeration-filtration), whereas 92% As removal was achieved in the anoxic system. (tudelft.nl)
- Desalination was conducted by membrane capacitive deionization (MCDI), which shows low specific energy consumption (SEC). Anoxic groundwater with As(III) and Fe2+ was treated using a pre-oxidation step called subsurface arsenic removal (SAR) with the main advantage that no As-laden waste is produced. (edu.au)
Oxidation5
- Expected groundwater model conditions include low oxidation-reduction potential (ORP) measurements, elevated arsenic and elevated iron. (searchanddiscovery.com)
- Generally, abstracted groundwater is aerated, leading to iron (Fe 2+ ) oxidation to Fe 3+ and precipitation as Fe 3+ -(hydr)oxide (HFO) flocs. (tudelft.nl)
- This study hypothesizes that full utilization of the adsorption capacity of groundwater native-Fe 2+ based HFO flocs is hampered by rapid Fe 2+ oxidation-precipitation during aeration before or after storage. (tudelft.nl)
- There are four oxidation states of arsenic (As) such as arsines and methyl arsines (As 3- ), elemental arsenic (As 0 ), arsenite (As 3+ ) and arsenate (As 5+ ), the inorganic form (As 3+ or As 5+ ). (ijpsr.com)
- The acid produced through oxidation of pyrite and other sulfides caused elevated solubility and plant availability of copper, zinc, and arsenic, which killed vegetation and polluted surface and ground water. (cdc.gov)
Soil5
- arsenic in soil extended onto the western adjacent property belonging to FPL's Woodlands Substation. (apexcos.com)
- Beside adsorption on soil colloids, iron-arsenic co-precipitation phenomena can affect arsenic retention in soils. (unito.it)
- Arsenic (As) is widely distributed in water, soil, air and biota from natural and anthropogenic sources 1, 2 . (ijpsr.com)
- It deals with constraints on the mobility of arsenic in groundwater, its uptake from soil and water by plants, arsenic-propagation through the food chain, human health impacts, and arsenic-removal technologies. (routledge.com)
- Raina Maier, Director of the UA SRP noted that "by working together we were able to identify and address many of the community's questions about exposures to arsenic and lead in air, soil, house dust, and drinking water as well as levels of arsenic and lead in community member's blood and urine. (cdc.gov)
Extent of arsenic1
- Similarly, we designed a remedial approach to shrink the extent of arsenic in groundwater to within the maintenance area property boundaries. (apexcos.com)
Surface water and groundwater2
- Ethion has been detected only rarely in both surface water and groundwater monitoring studies typically at concentrations below 0.5 ppb. (cdc.gov)
- The water you drink is a combination of surface water and groundwater. (medlineplus.gov)
India3
- The Department of Water Resources, River Development and Ganga Rejuvenation has issued guidelines for control and regulation of groundwater extraction with pan-India applicability. (bilkulonline.com)
- The University of Miyazaki has conducted activities for arsenic mitigation in Uttar Pradesh State, India, under a JICA technical cooperation project from 2008 until now, in collaboration with AAN. (scirp.org)
- The arsenic (As) concentration in the north-eastern states of India is greater than 0.05 mg/l, implying that millions of people are at serious risk of as poisoning 11 . (ijpsr.com)
Mobilization of arsenic1
- The present study was conducted to explore the influence of geomorphic features of the area on the mobilization of arsenic in groundwater. (copernicus.org)
Cadmium3
- Cadmium and chromium were found in groundwater of 24 districts in nine states and in 29 districts of 10 states, respectively. (bilkulonline.com)
- To evaluate the environmental concentration of lead, cadmium, mercury and arsenic in autochthonous species of moss and to analyze some methodological aspects of biomonitoring in Paraguay. (bvsalud.org)
- A higher level of ambient nickel with allergic diseases of humans are arsenic, cadmium, was associated with increased respiratory symptoms lead, nickel, chromium and manganese ( 8,9 ). (who.int)
Releases arsenic1
- Gold processing releases arsenic from mine tailings, and contaminated groundwater may be unsafe to drink for decades. (wikipedia.org)
Shallow groundwater2
- At Lake St. John (LSJ) Field, Concordia Parish, Louisiana, dissolved arsenic in shallow groundwater (8 ft to 22 ft below ground surface) occurs in former emergency pit areas associated with tank batteries and with the saltwater injection disposal system. (searchanddiscovery.com)
- This study specifically addresses the following-does a reductive dissolution model explain, or partially explain, an elevated dissolved arsenic shallow groundwater signature around the oilfield pits? (searchanddiscovery.com)
Drinking Water11
- A 2007 study found that over 137 million people in more than 70 countries are probably affected by arsenic poisoning of drinking water. (wikipedia.org)
- Federal standards allow drinking water to have arsenic levels of up to 10 parts per billion (ppb) -- 83% of the Emmett neighborhood homes exceeded this level, with some reaching over 40 ppb. (michiganradio.org)
- High levels of arsenic in drinking water have been linked to increased risk of cancer, and low levels have been linked to everything from diabetes to a higher stroke risk. (michiganradio.org)
- In: Best practice guide on the control of arsenic in drinking water. (lincoln.ac.uk)
- To protect families, EPA recommends that private well owners routinely test their drinking water for arsenic. (thedriller.com)
- Arsenic contamination of groundwater, in Asia, is seen in the basins of the great rivers, originating in the Himalayan Mountains and the Tibetan Plateau, such as the Ganges River, the Indus River, the Mekong River, the Haw River, and the Yellow River [1], where people depend on the drinking water for groundwater. (scirp.org)
- Approximately 150 million people have been affected by drinking water contaminated with arsenic (As). (ijpsr.com)
- The levels of arsenic (As) in drinking water in several countries worldwide cause a major public health issue. (ijpsr.com)
- Over 15 million U.S. households rely on private groundwater wells for drinking water. (cdc.gov)
- Testing of both private groundwater wells and the public water supply has revealed arsenic levels above drinking water standards set by the U.S. Environmental Protection Agency (EPA)(see box for more information about arsenic in water from private wells). (cdc.gov)
- Pennsylvania's Tracking Program concentrations population dependent on private of arsenic in the state's ground water, counseled families in high risk areas in groundwater wells for drinking water. (cdc.gov)
Compounds4
- Groundwater remedial design consisted of the injection of an amendment designed to drive the aquifer to extreme reducing conditions to precipitate arsenic from groundwater with the introduction of iron and sulfate designed to form arseno-pyrite compounds. (apexcos.com)
- This paper reviews the natural and anthropogenic occurrence of arsenic in the environment, toxicity of arsenic and newly invented scientific low coast household and the other chemical processes to remove arsenic (As) and its compounds from arsenic-contaminated water and soils in the world as well as in Tripura. (ijpsr.com)
- Fish generally contain a form of arsenic that is thought to safely pass through the human body without being metabolized, but dark meat fish also contain arsenic compounds that can be metabolized. (sciencedaily.com)
- Toxicological appraisal of halogenated aromatic compounds following groundwater pollution : report on a WHO working group. (who.int)
Level of arsenic1
High11
- It is a high-profile problem due to the use of deep tube wells for water supply in the Ganges Delta, causing serious arsenic poisoning to large numbers of people. (wikipedia.org)
- About 160 households are affected by the high levels of arsenic. (michiganradio.org)
- The glaciers melted and exposed arsenic-bearing rocks in the high Himalayas, and more arsenic made its way on to the alluvial plains. (thewire.in)
- This map shows the position of shorelines between 7,000 and 4,000 years ago, along with the location of wells with high levels of arsenic. (thewire.in)
- The map below shows high arsenic levels in groundwater coinciding with topographic lows (i.e. depressions in the land). (thewire.in)
- The greatest risk of arsenic contamination occurred when the hydraulic conductivity of the bedrock aquifer was high, or where there was upward flow from the bedrock aquifer because of the position of the well in the flow system. (usgs.gov)
- The study, published in the journal Environmental Science and Technology , identifies factors that may contribute to high arsenic in wells, and confirms findings from previous studies. (thedriller.com)
- However, based on the compound's measured K value in oc soils with moderate-to-high levels of organic matter, ethion is relatively immobile and does not leach into groundwater. (cdc.gov)
- However, moderate to high (10-50 micrograms) arsenic concentrations have been present in groundwater in eastern New England. (studydaddy.com)
- Groundwater with high levels of arsenic in southwestern and northeastern Taiwan received much attention. (routledge.com)
- Many of these HMs, such contaminated with low levels of arsenic can be harmful as copper, chromium, iron, manganese and zinc, are es- for the respiratory system ( 10 ), and a high blood level of sential to health. (who.int)
Water for arsenic1
- Is there an affordable and practical way of testing water for arsenic levels, suitable for poor and remote areas? (appropedia.org)
Amount of arsenic1
- As a result, a lesser amount of arsenic made its way onto the alluvial plains. (thewire.in)
Effects of arsenic1
Occurrence of arsenic1
Soils3
- The fate of the arsenic added to the soils by irrigation hence resulted strongly influenced by iron-arsenic co-precipitation, depending on the Fe/As ratio in water. (unito.it)
- Elevated non-volatile dissolved organic carbon (NVDOC) concentrations in groundwater monitoring wells under oil-contaminated hydrophobic soils originating from a pipeline rupture at the National Crude Oil Spill & Natural Attenuation Research Site near Bemidji, MN are documented. (usgs.gov)
- In Dewey-Humboldt, Arizona historical mining of gold, silver, copper, lead and zinc ores, and purifying of ores, left behind arsenic and lead in soils in some areas. (cdc.gov)
World Health Organ1
- Mar. 11, 2020 Millions of people worldwide consume water contaminated with levels of arsenic that exceed those recommended by the World Health Organization. (sciencedaily.com)
Levels9
- Sampling done from 1983 through 2003 shows where arsenic levels in groundwater are the highest in Michigan. (michiganradio.org)
- New Delhi, Nov 30: Fluorides, nitrates, arsenic and iron have been found above the optimum levels in the groundwater of 370, 423, 154 and 341 districts of the country, respectively, the Parliament was informed on Monday. (bilkulonline.com)
- Levels of arsenic (As) in the environment have become a global concern due to its toxicity and adverse effects on human health and other living beings. (ijpsr.com)
- According to the North Eastern Regional Institute of Water and Land Management (NERIWALM) report 2007, the arsenic (As) levels in Assam, Manipur, Tripura and Arunachal Pradesh were above 300 parts per billion (ppb). (ijpsr.com)
- According to the World Health Organisation (WHO), uptake of water contaminated with arsenic (As) levels of over 50 ppb can cause skin lesions and even cancer. (ijpsr.com)
- Dec. 9, 2020 A national study of public water systems found that arsenic levels were not uniform across the U.S., even after implementation of the latest national regulatory standard. (sciencedaily.com)
- Some people in this area may be exposed to arsenic at levels that can pose health risks over the long-term. (cdc.gov)
- Lead concentrations detected in moss explants exposed to the urban environment were higher than mosses from natural forest, while arsenic levels in the latter were higher than those found in bryophytes transferred to the city. (bvsalud.org)
- The different lead levels measured here, could be surrogates of urban pollution while the notorious arsenic level in natural forest moss points to other sources like wildfires. (bvsalud.org)
Ganges1
Mobility3
- Geochemical modeling indicates that precipitation and dissolution of Fe- and Mn-minerals controls the mobility of trace metals in groundwater. (auburn.edu)
- Geochemical parameters that influence arsenic speciation (arsenate vs. arsenite), mobility, and toxicity will also be presented. (lsu.edu)
- Dissolved organic carbon (DOC) and Fe mineral phases are known to influence the mobility of arsenic (As) in groundwater. (bournemouth.ac.uk)
Inorganic arsenic4
- On the other hand inorganic arsenic (As) is associated with iron, cobalt or nickel coupled with sulphide minerals 3 . (ijpsr.com)
- The widespread contamination and toxicity of inorganic arsenic (As) is an alarming issue as the metalloid does not degrade, nor can it be destroyed in the environment. (ijpsr.com)
- Chronic inorganic arsenic poisoning is also associated with a number of chronic medical conditions (hypertension, diabetes mellitus, and peripheral vascular disease) as well as lung, bladder, and hepatic malignancies. (medscape.com)
- Chelation therapy may be necessary in patients with inorganic arsenic poisoning. (medscape.com)
Poses3
- Arsenic (As) contamination of groundwater poses a global and serious environmental concern. (confex.com)
- Arsenic poisoning poses a threat to public health, and is a serious environmental hazard in many developing countries worldwide. (biomedcentral.com)
- As groundwater pollution poses a major risk to human life by being an important source of freshwater, Tudu listed out various initiatives taken by the Central government in the past few years to tackle the problem. (bilkulonline.com)
Bedrock1
- In areas of Karst, much of the rainfall that would normally flow to rivers and streams, directly or indirectly flows into the shallow bedrock and becomes part of the groundwater some water wells may utilize. (iowadnr.gov)
Irrigation2
- Irrigation systems favouring the sedimentation of the Fe-As flocks could help in protecting the rice from the adverse effects of dissolved arsenic. (unito.it)
- The reducing of groundwater table due to over exploitation of groundwater for irrigation has initiated the discharge of arsenic. (chemistryfundamentals.com)
Corrosion inhibitors2
- If the model does not explain elevated arsenic (or even if it does), what additional evidence is available through the historic oil field operations concerning possible arsenic addition, specifically 1950s arsenic corrosion inhibitors? (searchanddiscovery.com)
- This presentation will include a summary of potential arsenic contaminant sources (e.g., the use of corrosion inhibitors, disposal of arsenic-containing brines, condensate/crude oil, and mine tailings, use of arsenic-based herbicides, etc. (lsu.edu)
Geochemical conditions2
- Geochemical speciation models show that highly toxic As(III) is the dominant As species in Manikganj groundwater geochemical conditions. (auburn.edu)
- In cases where arsenic has been released into the environment, site-specific geochemical conditions dictate its fate and transport. (lsu.edu)