Issue 32, 2017, Issue in Progress
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RSC Advances

Characterization of an inorganic polymer coagulant and coagulation behavior for humic acid/algae-polluted water treatment: polymeric zinc–ferric–silicate–sulfate coagulant†

Yong Liao,ab   Xiaomin Tang, ORCID logo *ac   Qingqing Yang,ab   Wei Chen,ab   Bingzhi Liu,ab   Chuanliang Zhao,ab   Jun Zhaiab  and  Huaili Zheng*ab  

* Corresponding authors

a Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, State Ministry of Education, Chongqing University, Chongqing 400045, P. R. China
E-mail: txmno1@126.com, zhl@cqu.edu.cn
Fax: +86 023 65120827
Tel: +86 23 65120827

b National Centre for International Research of Low-carbon and Green Buildings, Chongqing University, Chongqing 400045, P. R. China

c Chongqing Key Laboratory of Catalysis and Environmental New Materials, College of Environment and Resources, Chongqing Technology and Business University, Chongqing 400067, P. R. China

Abstract

Algae and algae organic matter (AOM) are not the sole pollutants in algae-polluted water. Other pollutants such as colloidal particles and natural organic matter should be simultaneously removed and might influence the treatment of algae and AOM. A new polymeric zinc–ferric–silicate–sulfate (PZFSiS) coagulant was prepared, and the relationship between its structure and performance in the treatment of humic acid (HA)/algae-polluted water was discussed. PZFSiS coagulants prepared under different conditions had different distributions of Fe(III) species. The coagulant possessing the highest Feb content was able to treat turbidity and HA well. As a copolymer of Fe(III), Zn(II) and Si(IV), PZFSiS had a positive charge in water and thus neutralized the negative surface charges of pollutants. The adsorption of hydroxyl polymer formed by Fe/Zn during the hydrolysis process contributed to the removal of organic matter. The dosage of PZFSiS and pH significantly influenced pollutant removal. Colloidal particles in the water competed with the organic matter, markedly decreasing the removal efficiency of organic matter by coagulation.

Graphical abstract: Characterization of an inorganic polymer coagulant and coagulation behavior for humic acid/algae-polluted water treatment: polymeric zinc–ferric–silicate–sulfate coagulant

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Article information

DOI
https://doi.org/10.1039/C7RA00232G
Article type
Paper
Submitted
06 Jan 2017
Accepted
24 Mar 2017
First published
04 Apr 2017
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2017,7, 19856-19862

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Characterization of an inorganic polymer coagulant and coagulation behavior for humic acid/algae-polluted water treatment: polymeric zinc–ferric–silicate–sulfate coagulant

Y. Liao, X. Tang, Q. Yang, W. Chen, B. Liu, C. Zhao, J. Zhai and H. Zheng, RSC Adv., 2017, 7, 19856 DOI: 10.1039/C7RA00232G

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