无机高分子复合混凝剂聚合硫酸铝铁的制备与应用  

Preparation and applications of inorganic polymer composite flocculant poly aluminum ferric sulfate

作　　者：郑怀礼[1] 陈文源[1] 张智[1] 孙永军[1] 关庆庆[1] 刘力维[1] 卢伟[1] 郑晓楷[1] 

机构地区：[1]重庆大学三峡库区生态环境教育部重点实验室,重庆400045

出　　处：《重庆大学学报（自然科学版）》2013年第7期114-120,共7页Journal of Chongqing University

基　　金：重庆市工业发展基金产研专项资助项目(10-cxy-09);国家自然科学基金项目(51078366)

摘　　要：以工业副产物FeSO4.7H2O为原料,采用浓HNO3作为强氧化剂,Al2(SO4)3为添加剂制备混凝性能强的铁基混凝剂,并应用于有机腐殖酸的去除。研究内容包括:反应温度、合成时间、Al/Fe摩尔比和OH/Fe摩尔比,通过红外光谱和扫描电镜对其结构进行表征。研究结果表明:当反应温度为60～80℃,合成时间为30～50min,Al/Fe摩尔比为1∶9,OH/Fe摩尔比为0.3时,混凝剂的混凝性能强。红外分析表明了产物的结构,电镜扫描表明产物表面积较大,且凝聚形态强。将试验制备的聚合硫酸铝铁用于处理腐殖酸溶液时,当快搅速度为350rpm,快搅时间为120s,慢搅速度为40rpm,慢搅时间为12 min,投加量为3.36 mg/L,pH为7时,腐殖酸去除率达到94.6%。Industrial by-products FeSO4·7H2O is taken as raw material,concentrated nitric acid as strong oxidant and aluminum sulfate as additive to produce poly aluminum ferric sulfate（PAFS）flocculants,which is applied to the removal of organic humic acid.The study includes the reaction temperature,reaction time,Al/Fe molar ratio and basicity（OH/Fe）.Infrared spectroscopy and scattering electron are used to characterize the structure of the PAFS.The results show that the product have the best coagulation effect when reaction temperature,reaction time,Al/Fe molar ratio and basicity（OH/Fe）are 60～80℃,30～50 min,1∶9 and 0.3 respectively.Infrared spectroscopy analysis shows the product＇s structure and scattering electrons analysis suggests a large surface area and a strong condensed state for PAFS.The removal rate of humic acid is 94.72% when the dosage of PAFS is 3.36 mg /L,pH value is 7,rapid stirring speed is 350 rpm,fast mixing time is 2.0 min,the slow stirring speed is 40 rpm and slow stirring time is 12 min.

关 键 词：无机复合混凝剂 聚合硫酸铝铁 水处理 腐殖酸 

分 类 号：X703.1[环境科学与工程—环境工程]