【摘要】 在本专题[2]的基础上,用正交设计的试验方法,深入进行河口海域中的主要参量Cl‰、pH、悬浮颗粒物质和可溶性有机物(DOM)等七个变量二个水平和五个变量四个水平对粘土矿物固定重金属的吸附容量的综合效应作了探讨。实验结果得出了吸附剂(悬浮颗粒物质)和吸附质(重金属)有显著影响之外,DOM对Hg(Ⅱ)以及DOM和Cr(Ⅱ)、pH、Hg(Ⅱ)的交互效应,对Cu(Ⅱ)都有较大的影响。同时,计算了重金属在现场条件下向海底沉积的分量,进而估算长江口海域对有害重金属的净化能力,并提出Cr(Ⅲ)、Cu(Ⅱ)和Hg(Ⅱ)在长江口海域的地球化学收支平均的理论模式。更多还原

【Abstract】 Based upon the thermodynamic and kinatic study for the adsorption of Cr(Ⅲ),Cu(Ⅱ) and Hg(Ⅲ)on mineral clays,We employed the meth-amatical statistics in designing the experiment of 7 parameters with two levels per parameter system for adsorption As a result the adsorption ability for heavy metals on mineral clays,was significant deffercnt in various systems.According to the best probability of fixation for these three metals on mineral clay(multiple system),the mean turbidity and the discharge loads of effluent into Yangtze River water,We suggested a theoraticaj model for the geochemical balance o?budget Cr(Ⅲ),Cu(Ⅲ) and Hg(Ⅱ) under the evironrncnt of Yangtze River estuarine.Hence,We obtained a pattern of distribution and transport of these metals in the region.At last it was found that Cr(Ⅲ),Cu(Ⅱ) and Hg(Ⅱ) entered into the estuary and would be transported to sediment and offcoast leading to 70%,50% and 85% purification respectively.更多还原