Zeng Xi-bai, He Qiu-hong, Li Lian-fang, Bai Ling-yu
Ministry of Agriculture Key Laboratory of Agro-Environment & Climate Change, Institute of Agricultural Environment and Sustainable Development, Chinese Academy of Agricultural Sciences, Beijing, China.
Ying Yong Sheng Tai Xue Bao. 2010 Nov;21(11):2997-3000.
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.
进行了一项培养试验，以研究淹水条件下土壤中外源供应的二甲基砷酸（DMA）、一甲基砷酸（MMA）和砷（V）的动态变化。随着培养时间的增加，外源供应的DMA和MMA主要转化为砷（V），且砷（V）浓度增加，培养150天后显著高于培养1天后的浓度。外源供应的DMA在30天内脱甲基转化为砷（V），伴有少量砷（III），而外源供应的MMA在60天内转化速率相当缓慢，伴有少量砷（III）和DMA。外源供应的砷（V）随着培养时间的增加而减少，其形态变化较小，只是出现了少量砷（III）。
