[1]许霞,严雪琦,王利平.新型聚硅铁锌的混凝性能及应用[J].常州大学学报(自然科学版),2017,(02):17-22.[doi:10.3969/j.issn.2095-0411.2017.02.004]
　XU Xia,YAN Xueqi,WANG Liping.Coagulation Mechanism and Application Research of New Polysilicate-Ferric-Zinc(PSFZn)Coagulant[J].Journal of Changzhou University(Natural Science Edition),2017,(02):17-22.[doi:10.3969/j.issn.2095-0411.2017.02.004]
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新型聚硅铁锌的混凝性能及应用()
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常州大学学报(自然科学版)[ISSN:2095-0411/CN:32-1822/N]

卷:
期数:
2017年02期
页码:
17-22
栏目:
材料科学与工程
出版日期:
2017-03-28

文章信息/Info

Title:
Coagulation Mechanism and Application Research of New Polysilicate-Ferric-Zinc(PSFZn)Coagulant
作者:
许霞; 严雪琦; 王利平
常州大学 环境与安全工程学院,江苏 常州 213164
Author(s):
XU Xia;  YAN Xueqi;  WANG Liping
School of Enviromental and Safety Engineering, Changzhou University, Changzhou 213164, China
关键词:
聚硅铁锌(PSFZn);  混凝性能;  无机高分子
Keywords:
polysilicate-ferric-zinc(PSFZn);  coagulation mechanism;  inorganic coagulant
分类号:
TQ 31
DOI:
10.3969/j.issn.2095-0411.2017.02.004
文献标志码:
A
摘要:
以水玻璃、硫酸亚铁、硫酸锌及氯酸钠为原料,用共聚法制备聚硅铁锌混凝剂(PSFZn),观察PSFZn的形态、结构、Zeta电位及混凝性能,并对其混凝机理进行初步探讨。结果表明:n(Fe)/n(Zn)=4的PSFZn(PSFZn4)所呈现的团簇及片层结构能增大其比表面积,从而增强其混凝性能; 同时聚硅铁锌中的Si和Fe、Zn打破了铁盐、锌盐和聚硅酸本身的聚合成键模式,Si-O-Si、Fe-O-Fe、Zn-O-Zn形成了Si-O-Fe、Si-O-Zn键; 此外,PSFZn4在pH<3.14时ζ>0,该阶段PSFZn4以电中和、脱稳为主要混凝作用; 当pH>3.14时ζ<0,且随pH的进一步增大其负电性就越强,此时PSFZn4主要以吸附架桥及网捕作用为主。通过对实际水样的去除效果对比,发现 PSFZn4要远优于聚硅铁(PSF)、聚合硫酸铁(PFS)和聚合硫酸铁铝(PFA)。
Abstract:
A new type of inorganic coagulant, Polysilicate-ferric-zinc(PSFZn)was prepared using water glass, ferrous sulfate, zinc sulfate and sodium chlorate with co-polymerized method. The morphology, structure, zeta potential and coagulation performance of PSFZn were discussed. The results show that the cluster and lamellar structure of Polysilicate-ferric-zinc, prepared at 4 of Fe/Zn mol ratio(PSFZn4), pocessed large specific area which would strengthen coagulation performance. At the same time, Si-O-Fe bond and Si-O-Zn were formed between Si, Fe and Zn which changed the growth model of Fe-O-Fe, Zn-O-Zn and Si-O-Si respectively. In addition, the coagulation performance of PSFZn4 mainly depended on charge-neutralization when pH<3.14 with positive ζ value and adsorption-bridging/sweeping action when pH>3.14 with negative ζ value. PSFZn4 displayed better coagulation efficiency on the water treatment than Polysilicic-ferric(PSF), Polyferric sulfate(PFS)and Poly-ferric-aluminium sulfate(PFA).

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2016-05-17。
基金项目:江苏省高校自然科学研究项目(14KJB10002)。
作者简介:许霞(1982—),女,江苏常州人,博士,讲师,主要从事水处理材料的研发与应用研究。通讯联系人:王利平(1960-),E-mail: wlp@cczu.edu.cn
更新日期/Last Update: 2017-04-01