title: [Transformation of different exogenous arsenic forms in soil under aerobic condition].
abstract: An incubation test was conducted to study the transformation of exogenous dimethylarsenic acid (DMA), monomethylarsenic acid (MMA), and arsenate [As(V)] in soil under the condition of 35% of water-holding capacity. After added into soil, the concentrations of test arsenic forms all showed a decreasing trend with time. The DMA and MMA were mainly demethylated, and after 120 days incubation at constant temperature and humidity, transformed into As(V). A small amount of MMA was detected in the treatment with added DMA on the 120th day of incubation, and a small amount of DMA was detected in the treatment with added MMA during the period of 7-60 days incubation. By the end of the incubation test, the concentrations of added DMA and MMA in soil decreased significantly (P < 0.01), with the decrement being 99.5% and 94.3% and the concentration of transformed As(V) increased by 4.61 and 5.15 times, respectively. Comparing with DMA and MMA, the As(V) after added into soil had less form transformation.
authors: Ministry of Agriculture Key Laboratory of Agro-Environment & Climate Change, Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China. heqiuhong0201@163.com
authors: Qiu-hong
authors: QH
authors: He
authors: Xi-bai
authors: XB
authors: Zeng
authors: Lian-fang
authors: LF
authors: Li
authors: Ling-yu
authors: LY
authors: Bai
mesh_terms: D000332:Aerobiosis; D001149:Arsenates / Q000032:analysis / Q000737:chemistry*; D001152:Arsenicals / Q000032:analysis / Q000737:chemistry; D002101:Cacodylic Acid / Q000032:analysis / Q000737:chemistry*; D018556:Crops, Agricultural / Q000254:growth & development*; D006813:Humidity; D012987:Soil / Q000032:analysis*; D012989:Soil Pollutants / Q000032:analysis / Q000737:chemistry*; D013696:Temperature
chemical_list: D001149:Arsenates; D001152:Arsenicals; D012987:Soil; D012989:Soil Pollutants; D002101:Cacodylic Acid; C020300:monomethylarsonic acid; C025657:arsenic acid