title: [Influence of flooding on form transformation of soil arsenic].
abstract: An incubation test was conducted to study the dynamics of exogenously supplied dimethylarsenic acid (DMA), monomethylarsonic acid (MMA), and As(V) in soil under flooding. With the increasing time of incubation, the exogenously supplied DMA and MMA were mainly transformed into As(V), and the As(V) concentration increased, being significantly higher after incubated for 150 days, compared with that after incubated for 1 day. The exogenously supplied DMA was demethylated into As(V) within 30 days, accompanied by a little As(III), while the transformation rate of exogenously supplied MMA was rather slow within 60 days, accompanied by a little As(III) and DMA. The exogenously supplied As(V) decreased with increasing time of incubation, and its form had less change except that a little As(III) occurred.
authors.affiliation: Ministry of Agriculture Key Laboratory of Agro-Environment & Climate Change, Institute of Agricultural Environment and Sustainable Development, Chinese Academy of Agricultural Sciences, Beijing, China. zengxb@ieda.org.cn
authors.forename: Xi-bai
authors.initials: XB
authors.lastname: Zeng
authors.forename: Qiu-hong
authors.initials: QH
authors.lastname: He
authors.forename: Lian-fang
authors.initials: LF
authors.lastname: Li
authors.forename: Ling-yu
authors.initials: LY
authors.lastname: Bai
mesh_terms: D001151:Arsenic / Q000032:analysis / Q000737:chemistry*; D018556:Crops, Agricultural / Q000254:growth & development; D004784:Environmental Monitoring; D055868:Floods; D012987:Soil / Q000032:analysis*; D012989:Soil Pollutants / Q000032:analysis / Q000737:chemistry*
chemical_list: D012987:Soil; D012989:Soil Pollutants; D001151:Arsenic