阴离子对地下水中氯苯微电解的影响

Effects of Anions on Micro-electrolysis of Chlorobenzene in Groundwater

在模拟氯苯污染的地下水中分别添加Cl-,SO42-,NO3-,CO32-,HCO3-等阴离子,考察了各种阴离子对氯苯去除率的影响。实验结果表明:SO42-质量浓度对氯苯去除率影响不明显;HCO3-质量浓度为200～400mg/L、反应5h时,氯苯去除率与未加HCO3-的空白试样的氯苯去除率接近;随Cl-质量浓度增加,氯苯去除率下降;NO3-质量浓度为20mg/L和200mg/L时,微电解反应3h,氯苯去除率比未加NO3-的空白试样氯苯去除率提高了15%;CO32-质量浓度较低时,氯苯去除率较高,略高于未加CO32-的空白试样的氯苯去除率。

The anions such as Cl-, SO4 2- , NO3 -, CO3 2- , HCO3 - were respectively added into the simulated chlorobenzene-contaminated groundwater, and their effects on the chlorobenzene removal rate were studied. The experimental results show that： The effect of the SO4 2- mass concentration on the chlorobenzene removal rate is unremarkable ; When the mass concentration of HCO3 - is 200 - 400 mg/L and the reaction time is 5 h, the chlorobenzene removal rate is similar to that of the blank sample; The chlorobenzene removal rate is decreased with the increasing of Cl- mass concentration; When the mass concentration of NO3- is 20 mg/L and 200 mg/L and the reaction time is 3 h, the chlorobenzene removal rate is 15% larger than that of the blank sample.