碱渣对海洋水环境中PO_4^（3－）的吸附动力学特征

The Dynamic Feature Of Calcium Carbonate Residue Waste Adsorbed Phosphate In Seawater

本文作为碱渣倾倒对海洋水环境影响现场调查的先期研究，从理论上推导了固─液体系的二级吸附动力学模型。在室内试验的基础上，利用该模型对碱渣─海水混合体系的吸附试验数据进行了理论分析。认为碱渣对海水中磷酸盐的吸附是二级动力学过程。并且提出了碱渣─海水体系中碱渣含量对吸附反应速率影响大小的“强度指数”概念。应用该模型预测了不同混合比例条件下碱渣对海水中不同初始浓度磷酸盐的平衡吸附量和平衡浓度。理论分析发现，预测的平衡吸附量和平衡浓度之间符合乔姆金等温吸附方程，说明了海水中磷酸盐在碱渣表面上的吸附是遮盖率不大的单层化学吸附，与本文的前提假设相符合。

The influences of dumped calcium carbonate residue upon the marine environmental were studied.The dynamic feature of calcium carbonate residue adsorbed phosphate in seawater is one part of the studied works.Based on the laboratory experiments,a theoretical model of 2nd.order adsorption dynamics was built up in this paper and a new conception-“adsorbing strength exponent”was put forth in this theoretical model.Under several mixed proportions of the calciurn carbonate residue to seawater,the theoretical model was used to estimate the equilibrium amount(X(eq)) of adsorbed phosphate and the equilibrium concentration(C(eq)) of phosphate in seawaterIt is found that the relationship between X(eq) and C(eq) is according with TeMH equation.