以SO₄^2-的去除率作为考察指标，在高浓度SO₄^2-模拟地下水中以不同方式投加高铁酸钾（K₂FeO₄）、聚合氯化铝（PAC）和聚丙烯酰胺（PAM），考察不同药剂对SO₄^2-的去除效果，并对其去除机理进行了分析。研究结果显示，对于SO₄^2-浓度为1 000 mg/L的原水，加入K₂FeO₄比单独使用PAC和PAM处理时去除效果显著提高；K₂FeO₄-PAC-PAM复合药剂对SO₄^2-的去除率可达46.69%；并且发现K₂FeO₄和PAC-PAM的投加顺序也会对SO₄^2-的去除率产生不同程度的影响。在K₂FeO₄-PAC-PAM复合药剂体系中，K₂FeO₄起到显著的絮凝协同作用，从而使高浓度硫酸盐通过强化絮凝作用被去除。

In order to increase effectively the utilization value of groundwater with high sulfates content in water-scarce areas and to provide water quality guarantee for industrial water treatment processes such as reverse osmosis,taking the removal rate of SO₄^2- as the investigation index,potassium ferrate (K₂FeO₄),polyaluminium chloride (PAC) and polyacrylamide (PAM) are added in different ways in simulated groundwater with high concentration of SO₄^2- to investigate the removal effect of different agents on SO₄^2-.Removal mechanism is also analyzed.It is shown that for raw water with a concentration of SO₄^2- 1 000 mg·L^-1,the removal effect is significantly improved after adding K₂FeO₄ than when using PAC and PAM alone;the removal rate of SO₄^2- by K₂FeO₄-PAC-PAM compound agent can reach 46.69%,in which the adding order among K₂FeO₄,PAC and PAM will also affect the removal rate of SO₄^2- to varying degrees.It is found that in K₂FeO₄-PAC-PAM compound system,K₂FeO₄ plays a significant flocculation synergy,so that high-concentration sulfate is removed by enhanced flocculation.

王红旺(1991-),男,硕士生,研究方向为环境污染控制与修复,chao99699@163.com