摘要：

采用Fe₃O₄与PAC制备磁性-化学沉淀复合试剂MPACl，将其用于处理磷化工企业高含磷模拟生产废水。利用响应曲面法进行分析优化，得到对TP去除率影响大小顺序：MPACl投加量> PAC质量分数> pH。最佳运行条件为：MPACl中PAC占比74.75%，MPACl投加量16.07 g/L，pH=9，TP去除率为97.38%。MPACl除磷机理主要为：MPACl中聚合氯化铝水解并与磷酸根发生化学沉淀作用；磁性絮体对磷酸盐的化学吸附和沉淀网捕作用。

关键词: 含磷废水, 除磷, 磁强化混凝沉淀, 响应曲面法

Abstract:

The magnetic-chemical precipitation composite reagent MPACl prepared by Fe₃O₄ and PAC was used to treat high-phosphorus simulated production wastewater from phosphorus chemical enterprises. The response surface methodology was used for analysis and optimization, and the order of influence on the removal rate of total phosphorus (TP) was obtained: MPACl dosage>PAC mass fraction>pH. The optimal operating conditions were: PAC in MPACl accounts for 74.75%, MPACl dosage is 16.07 g/L, pH=9, and TP removal rate was 97.38%. The main mechanism of MPACl dephosphorization is: the polyaluminum chloride in MPACl is hydrolyzed and chemically precipitated with phosphate, and also phosphate is treated by the magnetic flocs with chemically adsorb and precipitation net trap.

Key words: phosphorus-containing wastewater, phosphorus removal, magnetically strengthened coagulation sedimentation, response surface methodology

中图分类号: 

• X703