A rapid, sensitive and economic method has been developed for the direct determination of toxic species of arsenic present in fish and mussel samples. As(III), As(V), dimethylarsinic acid (DMA), and monomethylarsonic acid (MMA) were determined by hydride generation-atomic fluorescence spectrometry using a series of proportional equations without the need of a chromatographic previous separation...

The objective of this study was to examine the removal of arsenic from groundwater by a laboratory scale electro-ultrafiltration (EUF) system. Two groundwater samples taken from I-Ian County located in the northeastern part of Taiwan were studied. These well waters were selected based on their As(III) and As(V) contents; the As(III) to As(V) ratios of the well water were 1.8 and 0.4 for Well-#1...

-The disposal of toxic heavy metals such as arsenic posed high risk to the environment. Arsenite [As(III)], a reduced form of arsenic, is more toxic and mobile than arsenate [As(V)]. The aim of this work was to isolate arsenic-tolerant bacteria from contaminated soil collected from various industrial landfills of Gujarat, India. This study explores the potential of the amplified ribosomal DNA r...

Concentrations of arsenic and other trace elements in groundwater were examined at three villages (PT, POT and CHL) in the Kandal Province of Cambodia. Concentrations of arsenic in the groundwater ranged from 6.64 (in POT village) to 1543 microg/L (in PT village), with average and median concentrations of 552 and 353 microg/L, respectively. About 86% out of fifteen samples contained arsenic con...

Arsenic is a human toxin and carcinogen commonly found as a contaminant in drinking water. Arsenite (As(III)) is the most toxic inorganic form, but recent evidence indicates that the metabolite monomethylarsonous acid (MMA(III)) is even more toxic. We have used a chemical genomics approach to identify the genes that modulate the cellular toxicity of MMA(III) and As(III) in the yeast Saccharomyc...

A rsenic, A rsenic H alides, Cyclopentadienyl Arsenic Com pounds, Crystal Structure l,2 ,3 ,4-T etraisopropylcyclopenta-2,4-dien-l-yl arsenic (III) dihalides, viz. TipCpAsX2 (1 X = Br, 2 X = I), have been prepared by direct m etathesis reaction betw een the correspond­ ing arsenic (III) trihalides with one equivalent o f TipCpK at low tem perature in good yields. Alternatively, 2 has been prepa...

The metalloid arsenic and the heavy metal cadmium have no demonstrated biological function in plants. Both elements are highly toxic and of major concern with respect to their accumulation in soils, in the food-chain or in drinking water. Arsenate is taken up by phosphate transporters and rapidly reduced to arsenite, As(III). In reducing environments, As(III) is taken up by aquaporin nodulin 26...

Abstract Arsenic is a common impurity element in sulfide concentrates. It tends to accumulate the flue dust of smelting furnace due volatility and internal circulation practiced smelting-converting process chain. The only outlets for arsenic are anodes discard slag. condensation dust-free conditions was studied below 800 °C where gas atmosphere controlled by SO 2 -air-N mixtures. Based on these...