改性复合钛基混凝剂制备及其除藻性能  

Preparation of Modified Composite Titanium-Based Coagulant and Its Algae Removal Performance

作　　者：张凤娥 相金钢 陈冬 熊秋秋 ZHANG Feng e;XIANG Jingang;CHEN Dong;XIONG Qiuqiu(School of Environmental&Safety Engineering,Changzhou University,Changzhou 213164,China)

机构地区：[1]常州大学环境与安全工程学院,江苏常州213164

出　　处：《常州大学学报（自然科学版）》2022年第1期25-32,共8页Journal of Changzhou University：Natural Science Edition

基　　金：2014龙城英才项目第六批领军人才优先支持资助项目(2014150)。

摘　　要：为了进一步增强无机高分子混凝剂的处理能力,引入稀土镧对混凝剂聚合硫酸铁钛进行改性处理,制备了镧改性聚合硫酸铁钛固体混凝剂(La-PTFS)。采用响应面实验优化混凝剂的制备条件,结果表明,在n(Fe)/n(Ti)=11.64,n(La)/n(Fe)=125.05,n(P)/n(Fe)=0.2时,制备所得La-PFTS对废水浊度去除率最高。在La-PTFS投加量为250 mg/L、快搅拌速率为200 r/min、慢搅拌速率为70 r/min时对某湖湖水的处理效果最好,浊度去除率达到94.8%,比市售聚合硫酸铁(PFS)提升了5%;叶绿素a去除率达到99.8%,比市售PFS提高了19.8%。In order to further enhance the processing capacity of the inorganic polymer coagulant,rare earth lanthanum was introduced to modify the coagulant polymerized iron titanium sulfate,and a lanthanum-modified polymerized iron titanium sulfate solid coagulant(La-PTFS)was prepared.The response surface experiment was used to optimize the preparation conditions of the coagulant,and it was shown that when n(Fe)/n(Ti)was 11.64,n(La)/n(Fe)was 125.05,and n(P)/n(Fe)was 0.2,the prepared La-PFTS could remove wastewater turbidity at the highest rate.When the dosage of La-PTFS was 250 mg/L,the stirring rate was 200 r/min,and the slow stirring rate was 70 r/min,the treatment effect on Lake water was the best,and the turbidity removal rate reached 94.8%,which was 5%higher than that of commercially available polyferric sulfate(PFS);the removal rate of chlorophyll a reached 99.8%,which was 19.8%higher than that of commercially available PFS.

关 键 词：复合混凝剂 镧改性 聚合硫酸铁钛 响应面 叶绿素A 

分 类 号：X524[环境科学与工程—环境工程]