黄河水中沉积物与铜和铅交换吸附等温线的研究

Study on the Adsorption Exchange Isotherms of the Sediments on Cu^(2+) and Pb^(2+) in the Yellow River

运用界面分级离子 /配位子交换原理和方法研究了黄河水中Cu2 + ,Pb2 + 与沉积物相互作用的等温线。这类等温线具有 1个“拐点”2个“平台”。应用分级离子交换平衡理论导出的等温式 ,用作图法求出了 2种金属离子与沉积物相互作用的平衡常数K1和K2 。证明Cu2 + ,Pb2 +在黄河水中与沉积物的交换吸附是分二级进行的。

The isotherms of the interaction between Cu 2+ , Pb 2+ and the sediments in the Yellow River were studied by the theory and method of interfacial stepwise ion/coordination particle exchange. The isotherms are stepped, formed by two curves combined together with a “plateau” in the middle. The isothermal equation of surface stepwise ion exchange is applied to calculating equilibrium constants K 1 and K 2 of two metal ions by the diagrams. The exchanged adsorption between Cu 2+ , Pb 2+ and the sediments is stepwise in the Yellow River water.