The formation of arsenic sulfide phases in aquifer sediments as a mechanism for removal from solution, as opposed to adsorption or substitution mechanisms, requires that the solubility of the sulfide mineral is exceeded (at least locally) and that mineral precipitation rates are fast compared with the rate of groundwater flow.
The separated arsenic and sulfur species were detected by an electrical conductivity detector (DS6 Heated Conductivity Cell), which measures the conductance of each ion. The …
From Table 1, the main composition of the arsenic sulfide sludge are arsenic, sulphur and copper, and the concentration of each element is 36.70 wt%, 30.70 wt% and 2.54 wt%, respectively. There are also slightly (I think you need to find a better word here.) scattered metals in the arsenic sulfide sludge, such as rhenium (0.63%) and selenium.
Cys is synthesized in all subcellular compartments with own protein biogenesis by a two-step pathway: the formation of O -acetylserine (OAS) from serine and acetyl CoA …
Arsenic is both a siderophile and chalcophile element that can behave as a metal and combine with sulfur; however, in molten rock, it shows volatile behavior, similar to the light rare earth elements (Sims et al. 1990 ). As of 2014, arsenic has been shown to occur in 568 different mineral species (Nordstrom et al. 2014 ).
the reduced states of arsenic, iron, and sulfur for spectroscopic characterization. We combined spectral and chemical analysis of arsenic and iron in natural sediments with thermodynamic reaction-progress calculations to develop a general model for arsenic, iron, and sulfur speciation as a function of the oxidation state of the system.
Arsenic-sulfur-iodine glasses, recently described by Flaschen et al., were prepared and exposed to various neutral, acidic, and alkaline solutions. Chemical durability, reported in terms of weight lo...
Sulfur and arsenic often coexist in the environment and share similar microbial redox transformations. We examined the effects of sulfide on aerobic arsenite oxidation in alkaline lake water samples and in laboratory enrichment cultures. Significant arsenite oxidation occurred …
Sulfur and arsenic often coexist in the environment and share similar microbial redox transformations. We examined the effects of sulfide on aerobic arsenite oxidation in alkaline lake water samples and in laboratory enrichment cultures.
Arsenic is a metal (loid) that is toxic to microorganisms at elevated concentrations (Ballantyne and Moore, 1988) and can be present as several chemical species including the oxyanions arsenite (AsO 3−3) and arsenate (AsO 3−4) as well as arsenic thioanions.
Arsenic detoxification was mediated by PCs, NPTs and enzymes of S assimilatory pathway. • Sulfur supply results in immobilization of As in rice roots and low translocation to …
Arsenic sulfide | As2S3 | CID 61569 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, …
Although emerging evidence suggests positive association of arsenic (As) or sulfur dioxide (SO 2) exposure with human diseases, reports concerning the effects of co-exposure of As and SO 2 …
arsenic is a persistent and toxic metalloid existing in the aquatic environment.1–3 arsenic may cause poisoning and death in humans as a result of contaminated water.4–7 recently, arsenic contamination problems were reported in india, chile, bangladesh, vietnam, and other parts of the world.8–10 in china, chronic arsenic exposure has caused very …
Sulfur also promoted the biotransformation of As(III) in shoots into less toxic As species; reducing the As(III) proportion by 25% by 2 mmol L −1 of S under S-normal pre …
The word was subsequently adopted into Latin as arsenicum and ultimately into French and English as arsenic. Arsenic compounds have been known since the days of Ancient Greece …
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The ability of sulfur (S) to alleviate As toxicity and accumulation is clearly size dependent as NS could effectively reduce bioavailability and accumulation of As in rice via modulating the gene expression activity of As transport, S assimilatory, and glutathione synthesis pathways to facilitate AsIII detoxification.
This study investigated arsenic remediation by CBFM samples produced with high-sulfur fly ashes, waste synthetic gypsum, sodium sulfide, and elemental sulfur. Hardened concrete was batch tested in arsenic-contaminated deionized (DI) water and synthetic groundwater (SG) to elucidate ion competition.
Arsenic has numerous applications as a semiconductor and other electronic applications as indium arsenide, silicon arsenide and tin arsenide. Arsenic is finding increasing uses as a doping agent in solid-state devices such as …
What is the significance of arsenic-sulfur correlation in soil and plants? High arsenic concentration is correlated with sulfur in rock and soil samples then it's continue in to plant (paddy)...
It is concluded that cysteine exacerbates roxarsone toxicity by reducing it to the more toxic trivalent state. Experiments were conducted with growing crossbred chicks to determine the reasons why cysteine exacerbates roxarsone (3-nitro-4-hydroxyphenylarsonic acid) toxicity. A fortified corn-soybean meal diet that met or exceeded all nutrient requirements of the young …
Carbon Arsenic Sulfur Elemental Beers! 74% CASCAIS Carbon Arsenic Calcium Iodine Sulfur Elemental Towns and Cities - Portugal 71% CARCASS Carbon, Argon, Carbon, Arsenic, Sulfur Elements: Rock and Metal Bands III 70% CASH Carbon, Arsenic, Hydrogen Elemental Common Names 69% CAMUS Carbon Americium Uranium Sulfur Elemental Philosophers! 68% CASPER
Arsenic (As) contamination of water is a global concern and rice consumption is the biggest dietary exposure to human posing carcinogenic risks, predominantly in Asia. Sulfur (S) …
Arsenic in enargite is found to be in a chemical environment similar to that of arsenides or elemental arsenic, whereas copper in enargite is in a chemical state that corresponds to copper sulfide, Cu 2 S, for all samples irrespective of surface treatment (natural or freshly cleaved).
Sulfur has 4 stable naturally occuring isotopes while Arsenic has 1 stable naturally occuring isotopes. Chemical Properties: Ionization Energies and electron affinity Physical Properties Thermal Properties - Enthalpies and thermodynamics Regulatory and Health - Health and Safety Parameters and Guidelines Compare With Other Elements
Arsenic sulfide particles are fully formed and have clear crystal boundaries. Arsenic sulfide contains lead (2.8%) and zinc (0.6%), which form sulfates. Lead is mainly distributed over the surface of the particles, forming oxide–sulfide or sulfate phases. Table 2 Composition of Cake Phases at the Points of Local Sounding Full size table
Determination of arsenic and sulfur species in environmental samples by ion chromatography L. D. Hansen B. E. Richter D. K. Rollins J. D. Lamb D. J. Eatough Cite this: Anal. Chem. 1979, 51, 6, 633-637 Publication Date:May 1, 1979 https://doi.org/10.1021/ac50042a010 RIGHTS & PERMISSIONS Article Views 229 Altmetric - Citations 69
The present study showed that even in the absence of oxygen, arsenic and sulfur were likely to be released from As 2 S 3. By analyzing the arsenic and sulfur species released in the …
Arsenic is a substance that has been well known to both the 'healer' and the 'poisoner' throughout history. It is ubiquitous in our environment and it is a potent neurological and liver toxin as well as a lung, bladder and skin carcinogen. [1]