Fixation, transformation, and mobilization of arsenic in sediments.
Fixation, transformation, and mobilization of arsenic in sediments.
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DOI：
10.1021/es00159a005
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发表时间：
1987-05
影响因子：
11.4
通讯作者：
J. Brannon;W. H. Patrick
中科院分区：
文献类型：
--
作者：
J. Brannon;W. H. Patrick
研究了沉积物-水相互作用过程中沉积物砷的固定、形态和活化过程。重点放在转化和固定的As（V）在厌氧沉积物中，长期（6个月）释放的天然存在的和添加的As，和沉积物性质影响的动员As（V），As（III），和有机As。沉积物中的砷与相对不动的铁和铝化合物结合在一起。在厌氧培养之前向沉积物中添加As（V）也会导致As（III）和有机As在厌氧沉积物的间隙水和可交换相中的积累。砷从沉积物中被动员在短期和长期。短期释放量与间隙水和交换相中As浓度有关。长期净质量释放与沉积物总铁、可提取铁或CaCO/sub 3/当量浓度有关。参考文献52篇，图3幅，表11个。
Fixation, speciation, and mobilization of sediment arsenic (As) during sediment-water interactions were studied. Emphasis was placed on transformation and fixation of As(V) in anaerobic sediment, long-term (6 months) release of naturally occurring and added As, and sediment properties affecting the mobilization of As(V), As(III), and organic As. Arsenic added to sediment became associated with relatively immobile iron and aluminum compounds. Addition of As(V) to sediments prior to anaerobic incubation also resulted in accumulation of As(III) and organic As in the interstitial water and exchangeable phases of anaerobic sediments. Arsenic was mobilized from sediment over both the short and long term. Short-tern releases were related to As concentrations in the interstitial water and exchangeable phases. Long-term net mass releases were related to sediment total iron, extractable iron, or CaCO/sub 3/ equivalent concentration. 52 references, 3 figures, 11 tables.