摘要
Abstract
The bioavailability of heavy metals in sediment relies on their forms, but it is not clear what form is more bioactive. This article used sequential extraction procedure for evaluation of the forms of heavy metals in sediment, combined with sediment exposure test in micro－ ecosystems, in assessment of the bioavailability of different forms of heavy metals in sediment through regression. It was showed that the uptake ways of organisms may also influence the bioavailability of heavy metals. Copper with soluble, exchangeable, carbonate－ bound, and Fe－ Mn oxides－ bound forms, soluble Lead, soluble, exchangeable, and organic matter－ sulfide bound Manganese are bioavailable for eating－ deposit feeders; while to filter－ feeders, soluble copper, soluble Lead are available. For rooted plants, soluble copper, soluble lead, soluble, exchangeable, carbonate－ bound, and organic matter－ sulfide bound zinc, manganese with soluble, exchangeable, carbonate－ bound, and Fe－ Mn oxides－ bound forms are also bioavailable.关键词
重金属/形态/生物有效性分类
资源环境
