Moderate effect of calcium peroxide enhanced coagulation on algae containing water: cell characteristics and disinfection by-products formation
文献类型： 外文期刊
作者： Liang, Zihan 1 ; Yang, Shu 1 ; He, Xin 1 ; Yin, Chao 1 ; Zhu, Yiping 2 ; Wang, Xiaodong 3 ; Xu, Bin 1 ; Tang, Yulin 1 ;
作者机构： 1.Tongji Univ, Coll Environm Sci & Engn,Shanghai East Hosp, Minist Water Resources,State Key Lab Pollut Contro, Key Lab Urban Water Supply Water Saving & Water En, Shanghai 200092, Peoples R China
2.Shanghai Chengtou Raw Water Co Ltd, Shanghai 200125, Peoples R China
3.Chinese Acad Fishery Sci, Fishery Machinery & Instrument Res Inst, Shanghai 200092, Peoples R China
关键词： Microcystis aeruginosa; Calcium peroxide; Algal organic matter; Cell characteristics; Disinfection by-products
期刊名称：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING （ 影响因子：7.4； 五年影响因子：7.3 ）
ISSN： 2213-2929
年卷期： 2024 年 12 卷 4 期
页码：
收录情况： SCI
摘要： Preserving cellular integrity while eliminating algae cells constitutes a pivotal aspect in the removal of algae within potable water treatment facilities. The effect of calcium peroxide (CaO2) as a pre-oxidizer on water containing Microcystis aeruginosa and its algal removal performance and reaction mechanism were investigated in this study. CaO2 was found to be highly effective in removing algae, requiring only a small amount to eliminate algal cells while preserving their cellular integrity. At 1.0 mM CaO2, the algal cell damage rate was 19.2 % with mild oxidation and slight damage to cellular integrity. Dissolved organic carbon decreased to 75.9 % and 13.5 % of the original after pre-oxidation and enhanced coagulation at 1.0 mM CaO2, respectively. Higher CaO2 concentrations improved coagulation and reduced disinfection by-products (DBPs) precursors. Notably, CaO2 was more effective in reducing the formation of carbonaceous disinfection by-products compared to nitrogenous disinfection by-products. The formation of most DBPs by chloramination was less than that by chlorination, except for trichloromethane, which was first founded. This study showed that CaO2 had great potential for application in the treatment of algae-laden water.
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