聚硅酸锌絮凝剂絮凝性能及水中残锌量的研究  

Performance of Poly-zinc Silicate Sulfate as Flocculating Agent and Residual Zinc in Water

作　　者：王雪枫[1] 俞静[1] 黄雪莉[1] 

机构地区：[1]石油天然气精细化工教育部和自治区重点实验室,新疆大学化学化工学院,新疆乌鲁木齐830046

出　　处：《环境科学与技术》2014年第9期145-149,共5页Environmental Science & Technology

基　　金：国家自然科学基金项目资助(21067013);新疆大学石油天然气精细化工重点实验室教育部和自治区重点实验室项目资助(XJDX0908-2012-4)

摘　　要：对聚硅酸锌絮凝剂(PZSS)中硅锌物质的量比、投加量、水样pH值、絮凝慢搅时间及搅拌强度、沉降时间等因素对其絮凝性能、处理后清液和滤液残锌量的影响进行了研究,同时通过光子相关光谱法(PCS)、紫外吸收(UVA)扫描法对其粒径分布、Zn2+和Zn2+水解聚合物与聚硅酸的作用进行了进一步证明。结果表明,硅锌比1∶1、投加量1 mL/L、水样pH 7.0、慢搅时间10 min,沉降10 min的条件下,即可得到浊度和溶液中残锌量符合国家生活饮用水卫生标准的处理液。Poly-zinc silicate sulfate （PZSS） as a flocculant in lieu of common PAC was studied on flocculating performance; besides, residual zinc content in clear liquid and filter liquor after flocculation were measured. Factors such as molar ratio of silica to zinc in PZSS, dosage of PZSS, pH value of water sample, slow stirring time, stirring intensity and settling time were investigated. In addition, size distribution of PZSS and polysilicate was measured, and the interactions between Zn^2＋ and silicate were further proved by use of PCS and UVA. The optimized flocc＇ulation condition was determined, i.e., silica-to-zinc molar ratio 1：1, PZSS dosage： 1 mL/L, pH 7.0, slow stirring time for 10 min and settling time for 10 min. The experirnental study concluded that flocculation using PZSS could purify water sample meeting the relevant standard of drinking water quality in terms of turbidity and residual zinc content.

关 键 词：絮凝剂 聚硅酸锌 残锌量 余浊 

分 类 号：X703.5[环境科学与工程—环境工程]