Harmful algal bloom removal and eutrophic water remediation by commercial nontoxic polyamine-co-polymeric ferric sulfate-modified soils

Environmental Science and Pollution Research International
Guofei DaiZhenbin Wu

Abstract

Harmful algal bloom has posed great threat to drinking water safety worldwide. In this study, soils were combined with commercial nontoxic polyamine poly(epichlorohydrin-dimethylamine) (PN) and polymeric ferric sulfate (PFS) to obtain PN-PFS soils for Microcystis removal and eutrophic water remediation under static laboratory conditions. High pH and temperature in water could enhance the function of PN-PFS soil. Algal removal efficiency increased as soil particle size decreased or modified soil dose increased. Other pollutants or chemicals (such as C, P, and organic matter) in eutrophic water could participate and promote algal removal by PN-PFS soil; these pollutants were also flocculated. During PN-PFS soil application in blooming field samples, the removal efficiency of blooming Microcystis cells exceeded 99 %, the cyanotoxin microcystins reduced by 57 %. Water parameters (as TP, TN, SS, and SPC) decreased by about 90 %. CODMn, PO4-P, and NH4-N also sharply decreased by >45 %. DO and ORP in water improved. Netting and bridging effects through electrostatic attraction and complexation reaction could be the two key mechanisms of Microcystis flocculation and pollutant purification. Considering the low cost of PN-PFS soil and it...Continue Reading

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Citations

Jul 4, 2016·Journal of Environmental Sciences (China)·Wenqing ShiGang Pan
Mar 28, 2016·The Science of the Total Environment·Changhui WangHuacheng Xu
Nov 26, 2015·Environmental Science and Pollution Research International·Chunli Liao, Xiaobo Liu
May 4, 2016·Environmental Science and Pollution Research International·Shengpeng ZuoXiaofeng Jiang
Apr 22, 2017·Environmental Pollution·Guofei DaiWei Zhang
Jun 9, 2018·Environmental Science and Pollution Research International·Hengfeng ZhangHongjie Wang
Sep 29, 2020·ACS Sustainable Chemistry & Engineering·Yicheng HuVictor M Zavala

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