液膜法除电镀废水中铬的最佳试验条件和传质机理探讨

A study of Optimal Experimental Conditions and Mass-Transfer Mechanism with Emilsified Liquid-Membrane Treatment to Eliminate Chromium in Electroplating Waste Water

本文全面考虑了影响制乳和传质过程的各种因素,运用L18（21×37）多因素多水平正交试验,针对不同浓度含铬废水（20～100 ppm）,模索出能一次处理达到国家排放标准的液膜法除铬最佳试验条件,同时探讨了液膜法除铬分离机理,认为根据内相不同而存在两种不同的分离机理（同向迁移和逆向迁移）。

In this paper,considering the all —round factors in preparing the emulsion and influen cing the mass —transfer processes,the authors have used a multifactor and multilevel orthogonal test layout(L18(2~1×3~7))to investigate the optimal experimental conditions to remaove chro mium from different chromium —concentrated electroplating waste water with the liquid —membrane method in accord with the state standards through a single theatment.Moreover,the authors also have studied the seperating mechanism of eliminating chromium with the liquid — membrane method.The authors have concluded that according to the differences of the interior pases, there exist two kinds of seperating mechanism,i.e.unidirectional translation and bidirectoional translation.