广西大学资源环境与材料学院, 南宁 530004
School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China
的去除率分别为94.66%、58.92%和41.52%,藻细胞去除的氧化、絮凝的贡献率分别为30.50%和69.50%;当pH为6.0~10.0时,藻细胞去除率均保持较高水平,其中弱酸环境有利于提高藻细胞的去除;外加的HPO
时,藻细胞、叶绿素a去除率随着Zeta电位净值降低而升高。扫描电镜表征结果表明,协同氧化后大多数藻细胞形态结构完整,从而可有效避免IOMs释放。以上研究结果可为FeSO
-PMS治理富营养化水体中蓝藻水华提供参考。
Avoiding the formation of disinfection by-products (DBPs) and the release of intracellular organic matters (IOMs) are keys to resolve the potential risks of cyanobacterial blooms treated by traditional techniques. In this study, the advanced oxidation technology based on FeSO
cells was investigated. The effects of FeSO
were studied. Results showed that when the doses of FeSO
measurements were reduced by 94.66%, 58.92% and 41.52%, respectively. The oxidation and flocculation process contributed to the algae cell removal rates were 30.50% and 69.50%, respectively. The removal rates of
could maintained at a high level when the pH was in the rage of 6.0~10.0, especial with mild acidic conditions. Due to competitive inhibition of
, the removal efficiencies of algae cells began to decrease. FeSO
-PMS could effectively degrade organic matters (AOMs) with fluorescence characteristics. While the dosage of FeSO
, the removal rate of algae cells and Chl-a increased with the decrease of the absolute Zeta potential. Scanning electron microscopy analysis also showed that most of algae cells had non-destructive morphology and structure after coordinated oxidation, which indicated this process effectively avoiding the release of IOMs. The above results can provide theoretical foundation for FeSO
-PMS treating cyanobacteria blooms in eutrophic water bodies.
.
Effect of pH on the removal rate of algae cells
on the removal rate of algae cells
on the removal rate of algae cells
Changes of fluorescence EEM spectra of extracellular AOMs
Zeta电位净值、藻细胞、叶绿素a去除率变化
Changes of the absolute value of zeta potentials and the removal rate of algae cells and Chl-a
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