中文摘要：

铁渗透反应格栅是铬污染地下水的有效去除技术，但地下水中SO4^2-对格栅长期运行性能是否有影响以及如何影响还不清楚．本文采用批实验和柱实验的方法，研究了SO4^2-对颗粒铁除Cr（VI）动力学的影响．批试验表明，随SO4^2-浓度的增加，Cr（VI）的面积标准化速率系数ksA增加．柱实验表明，运行100PV以前，SO4^2-使颗粒铁对Cr（VI）的kSA显著增强，随后SO4^2-增强作用逐渐减弱，运行337PV时，SO4^2-没有明显的影响．SO4^2-通过在铁表面形成配合物而加速铁的溶解，增加颗粒铁的表面活性，从而增强颗粒铁对Cr（VI）的去除，生物作用不强时可以不考虑SO4^2-对格栅长期运行性能的影响．

英文摘要：

Iron permeable reactive barriers are an effective remediation of groundwater contaminated by hexavalent chromium. The impact of major ions in groundwater such as sulfate on permeable reactive barriers is unclear. The effect of sulfate on the removal dynamics with chromium concentration（20 mg/l） was investigated by mixed _batch and column experiments. Batch experiments show observed Cr（VI） reduction rate increased with increasing sulfate concentration.. Column results show that sulfate can make surface area normalized coefficients（kSA） of hexavalent chromium removal by granular iron increase before 100 PV. Subsequently ,the enhancement of sulfate became Weaker and weaker. Based on nearly 400 PV result, it is unnecessary to consider the sulfate efffct on reactive barrier long-term performance without obviouse biology activity .