Effects of Low Molecular Weight Organic Anions on the Release of Arsenite and Arsenate from a Contaminated Soil | Zendy

Shuzhen Zhang | Zendy; Wei Li | Zendy; Xiao-quan Shan | Zendy; Anxiang Lu | Zendy; Peijiang Zhou | Zendy

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Effects of Low Molecular Weight Organic Anions on the Release of Arsenite and Arsenate from a Contaminated Soil

Author(s) -

Shuzhen Zhang,

Wei Li,

Xiao-quan Shan,

Anxiang Lu,

Peijiang Zhou

Publication year - 2005

Publication title -

water air and soil pollution

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.557

H-Index - 111

eISSN - 1573-2932

pISSN - 0049-6979

DOI - 10.1007/s11270-005-8219-2

Subject(s) - arsenate , arsenite , arsenic , chemistry , metalloid , bioavailability , environmental chemistry , inorganic chemistry , adsorption , oxalate , dissolution , nuclear chemistry , metal , organic chemistry , bioinformatics , biology

Low-molecular-weight-organic-anions (LMWOAs) are important exudates of plants and may influence the mobility and bioavailability of metals or metalloids. In the present study the effects of selected LMWOAs, citrate, malate and oxalate, on the release of arsenite (As(III)) and arsenate (As(V)) in a contaminated soil were investigated. The organic anions have significant influence upon the release of arsenic from the soil, and a linear relationship exits between the released arsenic and the concentration of LMWOAs in the extractants. pH effects on the arsenite and arsenate adsorption were not significant over the range from 3 to 7. The amounts of arsenite and arsenate released were significantly correlated with the release of Fe, Mn and Al, suggesting that arsenic was mainly released from Fe-, Mn- and Al-oxides or hydroxides in soil. The ratio of released arsenite to arsenate was not influenced by LMWOAs.

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