聚合氯化铝和聚合硫酸铁对水中亚硒酸盐的去除研究

Study on selenite removal by polyaluminum chloride and polyferric sulfate

为达到快速有效去除饮用水中亚硒酸盐的目的,通过混凝法考察了聚合氯化铝与聚合硫酸铁对模拟硒污染饮用水源中亚硒酸盐的去除效果,探讨了初始浓度、投加量以及pH对去除效果的影响。结果表明,混凝工艺对水中亚硒酸盐的去除效果明显,在初始硒浓度为184μg/L时,聚合氯化铝和聚合硫酸铁对亚硒酸盐的最大去除率分别为70%和97%。聚合硫酸铁对亚硒酸盐的混凝去除效果明显好于聚合氯化铝,其最佳除硒pH为8。

For the purpose of fast and effective treatment of selenite, polyaluminum chloride （PAC1） and polyferric sulfate （PFS） were used in the coagulation process of the simulated drinking water contaminated by selenite. The effect of the initial concentration, dosage and pH on selenite removal was studied. The results show that coagulation is an effective process for the fast and effective removal of selenite from drinking water. At the initial selenite concentration of 184μg/L, the maximum removal by PAC1 and PFS are 70% and 97% , respectively. PFS shows better removal of selenite than PAC1 and the optimum pH for PFS is 8.