ZVI 与 TCE 反应参数优化及动力学方程的建立

摘要

以批量研究的方法，考察了ZVI纯度、ZVI粒径、ZVI投量、pH值、温度和初始TCE浓度对TCE去除的影响，建立了ZVI去除TCE的动力学方程。最佳参数为：ZVI纯度92％，ZVI粒径30目，ZVI投量30 g ，pH值为6．0，温度25℃，初始TCE质量浓度50mg／L。最佳条件下TCE去除率可达73．6％，反应符合一级动力学方程。%Batch research methods are used to investigate the influences of ZVI purity ,ZVI particle size ,ZVI dosing quan-tity ,solution pH value ,reaction temperature and initial concentration of TCE on TCE removing .The mathematical models of ZVI removing TCE are established .The optimum experiment conditions are :92% purity of ZVI ,size 30 mu size of ZVI ,30 g of ZVI additive amount ,solution pH 6 .0 ,reaction temperature of 25℃ and initial TCE concentration of 50 mg/L .TCE removal rate can reach 73 .6% under these optimum conditions and the reaction kinetics equations agree with the pseudo -first-order reaction kinetics equation .