摘要
采用逐级连续化学浸提技术分析底泥重金属的形态 ,结合微生态系统生物暴露试验 ,通过线性回归的方法 ,评价了不同形态的生物有效性。结果表明 ,不同形态重金属的生物有效性 ,对不同吸收途径的生物是不同的。对于食腐屑的底栖动物而言 ,底泥Cu的水溶态、离子交换态、碳酸盐态、铁锰氧化态 ,Pb的水溶态 ,Mn的水溶态、离子交换态、有机 -部分硫化物态可被生物吸收利用 ;而底泥Cu的水溶态 ,Pb的水溶态对滤食性底栖动物具有生物有效性 ;底泥Cu的水溶态 ,Pb的水溶态 ,Zn的水溶态、离子交换态、碳酸盐态、有机 -部分硫化物态 ,Mn的水溶态、离子交换态、碳酸盐态、铁锰氧化物态对水生根系植物是有效的。
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.
出处
《农业环境保护》
CSCD
北大核心
2001年第1期19-22,共4页
Agro-Environmental Protection
基金
国家自然科学基金!资助项目(29277280)
