金属沾污沉积物环境质量评价技术研究

It was dertermined that AVS (cold-acid volatile sulphide) was the dominant factor, which controlled toxic metals partitioning between sediment–rstitial water em(inactive-active). The reaction mechanism of AVS ominating hemical activities of toxic metals was scussed. The results of benthos toxicity tests validated that such equilibrium tioning relationship could quantificationally predtic the bioavailabiltiy or toxicity of heavy metals. Therefore, the ference and/or ratio of SEM (simultaneously extracted metals) and AVS was actually the effective criterion for assessing toxicity of metal-contaminated iment.In additional, this study tried to assess the sedient quality in continental shelf sea areas with backgroud value method. The sediment quality in coastal area, where pollutants including heavy metals nad organic pollutants -existed, was discussed with Hakanson ecological risk index method.

建立和完善金属沾污沉积物的环境质量评价方法是环境管理急需的一项重要基础工作。本项目拟通过对痕量金属在固相沉积物和间隙水间分配的机理研究，确定影响平衡分配的地球化学主控因子，并以化学活性浓度-毒性效应响应关系为基础，适当的归一化因子处理的沉积锱ǘ任泶铮范êＱ蟪粱镏泻哿拷鹗舻亩拘糟兄担⒔⒊粱镏柿科兰坌录际酢?.