Metals chemical fractionation. Medical search. Frequent questions

Akcay H, Oguz A, Karapire C (2003) Study of heavy metal pollution and speciation in Buyak Menderes and Gediz river sediments. (springer.com)
Cuong D, Obbard J (2006) Metal speciation in coastal marine sediments from Singapora using a modified BCR-Sequential extraction procedure. (springer.com)
Optimization of Tessier procedure for metal solid speciation in river sediments. (bcpublication.org)
The research activities are focused also to the development of analytical methods for sizing and quantification of metal nanoparticles that are used in nanoremediation, medicine and food and to the development of speciation techniques and bio-imaging methods to determine the spatial distribution of target metallospecies in μ-sections of biological tissues. (environment.si)
We develop and employ chemical and biological techniques to follow elements transformations, their speciation and fractionation, including the use of stable and radioactive isotopes as tracers. (environment.si)
Considerable interest is continuing to be shown in the speciation of metals, metalloids, and organometals due to the dependence of their toxicity and mobility on their chemical form. (tubitak.gov.tr)
This review focuses on the speciation analysis of metals, metalloids, and organometals by solid phase extraction before spectrometric detection, and all aspects of analytical speciation such as determination of oxidation states and organometallic compounds. (tubitak.gov.tr)
Some applications of speciation of metals and metalloids are also presented and discussed in this review. (tubitak.gov.tr)
Fractionation, which is used sometimes as speciation, and chromatographic detection are not discussed. (tubitak.gov.tr)
This review covers approximately the last four years (2012-March 2016), offering a critical review of the speciation of metals, metalloids, and organometals. (tubitak.gov.tr)

The properties of metals in soils and sediments depend on the physiochemical form in which they occur [ 1 ]. (intechopen.com)
Adagunodo TA, Sunmonu LA, Emetere ME (2018) Heavy metals' data in soils for agricultural activities. (springer.com)
Ahmadipour F, Bahramifar N, Ghasempouri SM (2014) Fractionation and mobility of cadmium and lead in soils of Amol area in Iran, using the modified BCR sequential extraction method. (springer.com)
Aslibekian O, Moles R (2003) Environmental risk assessment of metal contaminated soils at silver mines abandoned mine site, co tipperary, Ireland. (springer.com)
Using fractionation profile of potentially toxic elements in soils to investigate their accumulation in Tilia sp. (reading.ac.uk)
Pavlović, P. Fractionation, mobility and contamination assessment of potentially toxic metals in urban soils in four industrial Serbian cities. (reading.ac.uk)
Fältmarsch, R., Åström, M. & Vuori K.-M., 2008: Environmental risks of metals mobilised from acid sulphate soils in Finland: a literature review. (sgu.se)
Lindström C., 2017: Acid Sulfate Soils and Metal Accumulation in Sediments in the Rosån Catchment, Northern Sweden. (sgu.se)
Meers E., Samson R., Tack F.M.G., Ruttens A., Vandegehuchte M., Vangronsveld J., Verloo M.G. (2007): Phytoavailability assessment of heavy metals in soils by single extractions and accumulation by Phaseolus vulgaris. (edu.pl)
Toxic metal pollution of waters and soils is a major environmental problem, and most conventional remediation approaches do not provide acceptable solutions. (nature.com)
and (3) Phytostabilization-the use of plants to eliminate the bioavailability of toxic metals hi soils. (nature.com)

The behavior, bioavailability and toxicity of heavy metals in soil essentially relies on their chemical spices. (springer.com)
Metals of interest are sometimes termed "heavy metals", a term which is often misleading as there are a variety of definitions of heavy metals, based on density, atomic number, atomic weight, chemical properties or toxicity. (aweimagazine.com)
Plants often employ one of two defense methods to deal with heavy metal toxicity: avoidance or tolerance. (bcpublication.org)
Plants use these two methods to keep heavy metal concentrations in their cells below toxicity threshold levels. (bcpublication.org)
Response of plants towards heavy metal toxicity: an overview of avoidance, tolerance and uptake mechanism. (bcpublication.org)
In order to assess significant risks, it is crucial to govern the concentrations of bioavailable/bio-accessible metals that are available in PM. Estimating the total metal concentrations in PM is only an approximation of metal toxicity. (bvsalud.org)
Additionally, there is compelling evidence that health risks assessed using total metal concentrations may be overestimated, therefore, the metal toxicity assessment is more accurate and more sensitive to the concentration of the bioavailable/bio-accessible fraction than the total metal concentrations. (bvsalud.org)
Often it is important to establish which chemicals contribute to the toxicity. (zendy.io)
Establishing causality can be difficult and often requires fractionation with subsequent toxicity testing. (zendy.io)
The sample collection and manipulation process can alter chemical bioavailability and toxicity. (zendy.io)
An in situ toxicity identification evaluation (iTIE) chamber is described that was placed in sediments and fractionated pore‐water chemicals into nonpolar chemicals, metals, and ammonia‐type groups. (zendy.io)
The dominant chemical classes were separated by the iTIE method and revealed which fractions contributed to toxicity. (zendy.io)
The loss of toxicity in the TIE approach did not allow for subsequent fractionation and stressor identification. (zendy.io)
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)

My research aims to characterize the isotopic variation among metal sources and to quantify the extent to which reactions (physical, chemical and biological) cause isotopic fractionation of heavy stable isotopes, with the goal of developing these isotope systems as tools for source and process identification. (oregonstate.edu)

Sediments serve as the ultimate sink of heavy metals in the marine environment and they play an important role in the transport and storage of potentially hazardous metals. (intechopen.com)
Ben Amor R, Yahyaoui A, Abidi M, Chouba L, Gueddari M (2019) Bioavailability and assessment of metal contamination in surface sediments of rades-hamam lif coast, around meliane river (Gulf of Tunis, Tunisia, Mediterranean Sea). (springer.com)
The geochemistry, environmental factor values, and toxic metal extraction characteristics of Lake Kalimanci sediments represent a serious environmental risk for an extensive area. (tubitak.gov.tr)
Trace metal fractionation in Lake Murray sediments. (google.co.in)
Abstract When sediments are found to be toxic usually there is a mixture of chemicals present. (zendy.io)

Changes in environmental conditions, such as temperature, pH, redox potential and organic ligand concentrations, can cause metals to be released from solid to liquid phase and sometimes cause contamination of surrounding waters in aquatic systems [ 3 ]. (intechopen.com)
3. Järup, L. Hazards of heavy metal contamination. (reading.ac.uk)
Rajaganapathy V, Xavier F, Sreekumar D. Heavy Metal Contamination in Soil, Water and Fodder and their Presence in Livestock and Products. (bcpublication.org)
It is observed that the environmental risk indices such as bioavailability index (BI), contamination factor (CF) and risk assessment code (RAC) are specifically influenced by the concentration of these metals in a particular fraction. (bvsalud.org)
Therefore, more attentions should be paid to study the ecological risks of heavy metals and microplastics co-contamination in environment. (bvsalud.org)
It may also occur through heavy metal contamination of herbal preparations and so-called nutritional supplements. (medscape.com)

metals and metalloids: Hg, Cd, Pb, As, Se) in various environmental compartments at the scale of molecules to watersheds. (environment.si)

This paper attempts to quantify the heavy metals spices bound to various soil fractions at five sampling stations (S1-S5) from the Doustbaglu area, NW Iran, to ascertain their bioavailability, using sequential extraction. (springer.com)
In order to assess the environmental pollution status, 2 environmental factors were established, while for the determination of chemical fractionation of toxic metals a sequential extraction procedure was carried out. (tubitak.gov.tr)
The results of the sequential extraction procedure revealed the majority of the investigated toxic metals (Zn, Pb, Ni, Cu, and Cd) to be strongly bonded to the exchangeable fraction and the rest (As and Mo) to the oxidizable fraction. (tubitak.gov.tr)
Manganese fractionation using a sequential extraction method to evaluate welders' shielded metal arc welding exposures during construction projects in oil refineries. (cdc.gov)
2006. Assessment of metal availability in contaminated soil by sequential extraction. (akjournals.com)

and other organometallic compounds that contain heavy metals. (cdc.gov)

Ma LO, Rao G. Chemical fractionation of cadmium, coppery nickel and zinc contaminated soil. (bcpublication.org)

Threshold limit values for chemical substances and physical agents and biological exposure indices. (cdc.gov)
Jakubus M. (2012): Evaluation of compost by selected chemical and biological methods. (edu.pl)
International Symposium- Impact of Chemical and Biological Hazards on the Environment, Animals and Human Health and its Countermeasure. (hokudai.ac.jp)
Biological mechanisms of toxic metal uptake, translocation and resistance as well as strategies for improving phytoremediation are also discussed. (nature.com)
A major focus is on how the oceans work, with special attention on geological, chemical, and biological processes. (iastate.edu)

Thornton, I. Urban environmental geochemistry of trace metals. (reading.ac.uk)
Prolonged exposure to even trace amounts of toxic or essential metals can also have negative health impacts. (bvsalud.org)
The role of trace elements and their impact to the environment and living organisms depend not only on their total concentration but also on chemical forms in which they are present. (environment.si)
Global inventory of natural and anthropogenic emissions of trace metals to the atmosphere. (nature.com)

Ten different single extractors were used to determine the contents of microelements obtained in the chemical extraction of four different composts. (edu.pl)
Feng M.-H., Shan X.-Q., Zhang S.-Z., Wen B. (2005): Comparison of rhizospherebased method with other one-step extraction methods for assessing the bioavailability of soil metals to wheat. (edu.pl)

Heavy metal pollution is a serious and widely environmental problem due to the persistent and non-biodegradable properties of these contaminants. (intechopen.com)
Bharagava, R.N. Phytoremediation of Heavy Metal-Contaminated Sites: Eco-environmental Concerns, Field Studies, Sustainability Issues, and Future Prospects. (reading.ac.uk)
Soil amendments: a tool to reduce heavy metal uptake in crops for production of safe food [J]. Reviews in Environmental Science and Bio-Technology, 2018, 17: 187-203. (bcpublication.org)
Hence, chemical fractionation of toxic metals can serve as an effective tool for developing environmental protection laws and improving air quality monitoring programs for public health. (bvsalud.org)
The use of specially selected and engineered metal-accumulating plants for environmental clean-up is an emerging technology called phytoremediation. (nature.com)
The world has long been aware of the environmental and health risks associated with widespread chemicals such as 1,4-dioxane," said Kent Sorenson, Alonia's chief technology officer. (com.ng)

A major class of chondrites that mostly have Mg/Si ratios near the solar value and oxygen isotope compositions that plot below the terrestrial fractionation line. (usra.edu)

Chu H, Vu T, Nguyen T, Nguyen H (2019) Accumulation of arsenic and heavy metals in native and cultivated plant species in a lead recycling area in Vietnam. (springer.com)
Hazelton, P. Evaluation of accumulation and concentration of heavy metals in different urban roadside soil types in Miranda Park, Sydney. (reading.ac.uk)
Gupta A.K., Singh S. (2006): Chemical fractionation and heavy metal accumulation in the plant of Sesamum indicum (L.) var. (edu.pl)
Accumulation and chemical form distributions of Cd in leaves were distinguished into young and mature leaves. (bvsalud.org)

This review provides an overview of various procedures for extracting soluble toxic metals from PM and the importance of chemical fractionation in risk assessment. (bvsalud.org)

2020. Available online: https://www.un.org/development/desa/en/news/population/2018-revision-of-world-urbanization-prospects.html (accessed on 11 March 2021). (reading.ac.uk)
Němec I, Smrčka V, Mihaljevic M , Mazanek J, Pokorny J. (2018) Multielemental Chemical Analysis of Elements in Mandibular Bone and Teeth in the Rat. (cuni.cz)

Although the soil acts as a natural buffer, its ability to do this depends on a variety of characteristics of the soil, such as pH and organic matter, and therefore affects the complexation, dispersion and bioavailability of the metals within the soil. (aweimagazine.com)
The major contents of the book are iodine from oil well brines, lactic acid from corn sugar, modern production of chlorine and caustic soda, organic chemicals, chemicals derived from methane and so on. (niir.org)

The samples were analyzed using an experimental method to separate different Mn fractions by valence states based on selective chemical solubility. (cdc.gov)

Isotopic and elemental fingerprinting and chemical profiling (e.g. sugar, fatty acid, or even contaminant profiles) provide a robust analytical tool to determine the origin of food. (environment.si)

Since then, significant research and development efforts have led to the development of a mechanical and chemical soil fractionation method that isolates the contaminant for recovery. (northex.net)

Heavy metals entering natural water become part of the water-sediment system and their distribution processes are controlled by a dynamic set of physicochemical interactions and equilibria. (intechopen.com)
Heavy metals are distributed throughout soil and sediment components and associated with them in various ways, including adsorption, ion exchange, precipitation and complexation and so on [ 2 ]. (intechopen.com)
The chemical form is also important, and biomethylation occurs readily with mercury, arsenic, tin and lead as the metals reach a sediment layer. (aweimagazine.com)
Based on values of the enrichment factor and geoaccumulation index, the surficial sediment of Lake Kalimanci is strongly polluted in terms of most of the examined metals. (tubitak.gov.tr)

On site analysis of metals is possible in both soil and water matrices, but it should be used to yield indicative data, prior to laboratory analysis. (aweimagazine.com)
Traditional "test-kits" based on colorimetric analysis have been used for the analysis of metals in water for many years and, although they can only be used for a few analytes which give good reaction chromophores, they do give good quality indicative results in the right matrices. (aweimagazine.com)
At the laboratory, the analysis of metals in water is a fairly straight forward affair with a filtered sample (either before or after addition of nitric acid) being analysed directly. (aweimagazine.com)

They are introduced into the aquatic system as a result of weathering of soil and rocks, from volcanic eruptions and from a variety of human activities involving mining, dredging, processing and use of metals and/or substances containing metal contaminants. (intechopen.com)
In addition, a variety of substances such as fuel, water, antifreeze, dust, and various combustion products such as polycyclic aromatic hydrocarbons (PAHs), metals, and metallic oxides accumulate in the oil. (cdc.gov)

Fuentes A., Llorens M., Saez J., Soler A., Aguilar I., Ortuno J., Meseguer F. (2004): Simple and sequential extractions of heavy metals from different sewage sludges. (edu.pl)

The presence of some metals such as Al, Fe, Co, and Mn, in dust may significantly modify the marine biochemistry and may change the phytoplankton communities resulting in fast growth rates leading to blooms [ 8 ], after deposition to Ocean waters [ 9 ]. (hindawi.com)
Limitations of the iTIE method as compared to the TIE methods were extensive pretest assembly process, fewer phase I fractionation possibilities, and restriction to shallow waters. (zendy.io)
Removal of some heavy metals from polluted waters by aquatic plants: Studies on duckweed and water velvet. (nature.com)

Air pollution is a major contributor to metal redistribution in the biosphere, although the transfer from air particulates to soil and vegetation is complex with a variety of physiochemical processes involved. (aweimagazine.com)
An example of air pollution causing a redistribution of metals in the environment can be seen with lead released through the use of lead additives in fuel. (aweimagazine.com)

Chiroma TM, Ebewele RO, Hymore FK (2014) Comparative assessment of heavy metal levels in soil, vegetables and urban grey waste water used for irrigation in Yola and Kano. (springer.com)

During use, the high temperatures and friction cause changes such as oxidation, nitration, and cracking of polymers in the component chemicals (Vazquez-Duhalt 1989). (cdc.gov)

Lignocellulosic biomass is a vital raw material for the sustainable production of fuels, chemicals, and energy. (ncsu.edu)

Peijnenburg W.J.G.M., Jager T. (2003): Monitoring approaches to assess bioaccessibility and bioavailability of metals: Matrix issues. (edu.pl)

Heavy metal stress can disturb the physiological function of plants and even lead to plant poisoning. (bcpublication.org)
The proxy is in fact something giving an indirect measurement of temperature, via the ecological limits of a plant or animal or a chemical reaction that works differently in different temperatures. (gregladen.com)

When the heavy metal content in soil is too high, the growth and development of plants will be hindered. (bcpublication.org)
Heavy metal detoxification is a necessary step in the phytoremediation process. (bcpublication.org)
Heavy metal pollutions: state of the art and innovation in phytoremediation. (bcpublication.org)
These are set to be joined by eight other products by 2030, including microbes that can remove heavy metal waste from mining. (com.ng)
An important difference between new and used motor oil is the heavy metal content. (cdc.gov)

Phytoremediation of heavy metals-concepts and applications. (bcpublication.org)

My research interests lie in natural biogeochemical cycling of metals and assessing the importance of anthropogenic activities as metal sources. (oregonstate.edu)
Metal emissions to the environment from anthropogenic sources may be much larger than those from natural sources. (oregonstate.edu)

Pahlevan, K., Stevenson, D. J. & Eiler, J. M. Chemical fractionation in the silicate vapor atmosphere of the Earth. (lostobject.org)

Free histidine as a metal chelator in plants that accumulate nickel. (bcpublication.org)

Ashford's dictionary of industrial chemicals: properties, production, uses. (cdc.gov)
The chemical industry comprises the companies that produce industrial chemicals. (niir.org)

P1B-ATPases-an ancient family of transition metal pumps with diverse functions in plants. (bcpublication.org)

Methods of soil analysis: Part 2 chemical and microbiological properties, vol 9. (springer.com)

Seventeen solvents were evaluated based on their Hansen solubility parameters and for having a similar polarity to the solvents they would replace, four of which were selected as substitutes in the classic fractionation process. (bvsalud.org)

It easily forms alloys with many metals, such as gold, silver, and tin, and these alloys are called amalgams. (wordquests.info)

The book contains manufacturing processes, reactions, equipments details, process flow diagram of number of chemicals, which have huge industrial uses. (niir.org)

Anatomy2

Diseases1

Chemicals and Drugs12

Analytical, Diagnostic and Therapeutic Techniques and Equipment13

Phenomena and Processes8

Disciplines and Occupations1

Information Science2

Speciation10

Soils11

Toxicity14

Isotopic fractionation1

Sediments5

Contamination6

Metalloids1

Sequential extraction5

Compounds1

Cadmium1

Biological5

Trace4

Extraction2

Environmental6

Isotope1

Accumulation4

Risk Assessment1

20182

Organic2

Fractions1

Fatty acid1

Contaminant1

Sediment4

Analysis of metals3

Substances2

Extractions1

Waters3

Pollution2

Assessment of heavy1

19891

Fuels1

Bioaccessibility1

Plant2

Heavy metal5

Phytoremediation1

Anthropogenic2

Atmosphere1

Accumulate1

Industrial chemicals2

Transition1

Microbiological1

Solubility1

Alloys1

Processes1