聚硅酸铝絮凝剂除氟除浊效能研究
Research on the efficiency of polysilicate aluminum flocculant in removing fluoride and turbidity
马潇莹 1程文雨 1王东田2
作者信息
- 1. 苏州科技大学 环境科学与工程学院,江苏 苏州 215009
- 2. 苏州科技大学 化学与生命科学学院,江苏 苏州 215009
- 折叠
摘要
随着半导体及光伏产业的发展,产生的含氟废水越来越多,含氟废水的处理也成为人们重点关注的问题.以聚硅酸铝絮凝剂(PSA)为除氟除浊药剂,研究了PSA的除氟除浊效果,并与硫酸铝、聚合氯化铝进行了除氟除浊效能对比.结果表明:PSA除氟除浊的最佳混凝条件为:水样pH=7、投加量4×10-4 mol/L、快搅速度260 r/min、快搅时间2 min、慢搅速度20 r/min、慢搅时间20 min、沉淀时间30 min,此时除氟率可达67.99%,剩余氟含量为1.60 mg/L,除浊率为98.67%.PSA的除氟除浊效果优于硫酸铝、聚合氯化铝.
Abstract
With the advancement of semiconductor and photovoltaic industries,the generation of fluorinated waste-water is on the rise,making the treatment of such wastewater a critical issue.This study investigates the effective-ness of polysilicate aluminum flocculant(PSA)as fluoride and turbidity removal agent in removing fluoride and tur-bidity,and compares it with the aluminum sulfate and polyaluminum chloride in the effectiveness of fluoride and turbidity as removal agent.The results indicate that the optimal coagulation conditions for PSA to remove fluoride and turbidity are as follows:water sample pH=7,dosage of 4×10-4 mol/L,fast stirring speed of 260 r/min,fast stir-ring time of 2 min,slow stirring speed of 20 r/min,slow stirring time of 20 min,and sedimentation time of 30 min.Under these conditions,the fluoride removal rate reaches 67.99%,with a residual fluoride content of 1.60 mg/L,and the turbidity removal rate is 98.67%.PSA outperforms aluminum sulfate and polyaluminum chloride in terms of fluoride and turbidity removal.
关键词
聚硅酸铝絮凝剂/除氟/除浊Key words
polysilicate aluminum flocculant/fluoride removal/turbidity removal引用本文复制引用
出版年
2024
NETL
NSTL
万方数据