Preparation and characterization of poly-aluminiumferric silicate sulfate coagulant and its coagulation property

doi:10.3969/j.issn.0438-1157.2013.08.052

CIESC Journal ›› 2013, Vol. 64 ›› Issue (8): 3070-3075.DOI: 10.3969/j.issn.0438-1157.2013.08.052

Preparation and characterization of poly-aluminiumferric silicate sulfate coagulant and its coagulation property

ZHANG Kaishi¹, ZENG Fengchun², TAN Chao¹, ZHU Denglei¹

1. School of Chemistry and Chemical Engineering, Yibin University, Yibin 644000, Sichuan, China;
2. School of Chemistry and Pharmaceutical Engineering, Sichuan University of Science and Engineering, Zigong 643000, Sichuan, China

Received:2012-12-06 Revised:2013-02-16 Online:2013-08-05 Published:2013-08-05
Supported by:
supported by the Key Science and Technology Development Program of Sichuan Province(2012JYZ008)and the Natural Science Foundation of Sichuan Province(2010ZA064).

聚合硅酸硫酸铁铝混凝剂的制备表征与混凝性能

张开仕¹, 曾凤春², 谭超¹, 朱登磊¹

1. 宜宾学院化学与化工学院, 四川宜宾 644000;
2. 四川理工学院化学与制药工程学院, 四川自贡 643000

通讯作者: 张开仕(1959- ),男,教授。
作者简介:张开仕(1959- ),男,教授。
基金资助:
四川省重点科技发展计划项目(2012JYZ008);四川省教育厅自然科学基金项目(2010ZA064)。

Abstract

Abstract: A new type of inorganic polymer coagulant,poly-aluminum ferric silicate sulfate(PAFSS),was prepared by alkali leaching,acidic leaching,oxidation,and polymerization.Fly ash,crap iron and waste sulfuric acid were utilized as raw materials.The structure,morphology and coagulation property of the sample were characterized by XRD,TEM,microelectrophoresis,ultrafiltration and coagulation experiments.The results showed that the multi-core PAFSS sample,which possessed larger amounts of Al-O-Si and Fe-O-Si,was synthesized from the interaction between Fe³⁺,Al³⁺,their hydrating polymers,SO₄^2- and poly-silicic acid.The polymer displayed branch-like structure with higher polymerization degree,and larger molecular weight.The coagulation property of samples was excellent when the Si/(Fe+Al)ratio was equal to 0.06-0.10.pH adaptability was much better than that of commercial polymerized ferric sulfate(PFS),polymerized aluminum chloride(PAC)and poly-aluminum ferric sulfate(PAFS).

Key words: fly ash, waste sulfuric acid, poly-aluminium ferric silica sulfate, coagulation property

关键词: 粉煤灰, 废硫酸, 聚合硅酸硫酸铁铝, 混凝性能

CLC Number:

ZHANG Kaishi, ZENG Fengchun, TAN Chao, ZHU Denglei. Preparation and characterization of poly-aluminiumferric silicate sulfate coagulant and its coagulation property[J]. CIESC Journal, 2013, 64(8): 3070-3075.

张开仕, 曾凤春, 谭超, 朱登磊. 聚合硅酸硫酸铁铝混凝剂的制备表征与混凝性能[J]. 化工学报, 2013, 64(8): 3070-3075.

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Preparation and characterization of poly-aluminiumferric silicate sulfate coagulant and its coagulation property

聚合硅酸硫酸铁铝混凝剂的制备表征与混凝性能

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