Abstract
The forms of arsenic in the Zuzou Zone of the Xiangjang River are evaluated. Nine fractions of arsenic, consisting of soluble arsenic(III) and total soluble arsenic, loosely bound arsenic, aluminium arsenate, iron arsenate, calcium arsenate, arsenic occluded on iron oxide, organic compounds of arsenic and residual arsenic, were separated from suspended solids and sediments by sequential chemical extraction. All arsenic fractions were determined by ASV and AFS. The distributions of arsenic and arsenic fractions in water, sediments and suspended solids are discussed in terms of the mechanisms of arsenic transport and deposition in aquatic ecosystems.
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