Effect of ozone and permanganate on algae coagulation removal - Pilot and bench scale tests
Effect of ozone and permanganate on algae coagulation removal - Pilot and bench scale tests
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DOI：
10.1016/j.chemosphere.2008.10.009
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发表时间：
2009-02-01
期刊：
影响因子：
8.8
通讯作者：
Tseng, I-Cheng
中科院分区：
文献类型：
--
作者：
Chen, Jen-Jeng;Yeh, Hsuan-Hsien;Tseng, I-Cheng
通过中试和小试试验，比较了臭氧预氧化和高锰酸盐预氧化对明矾混凝除藻的影响。结果表明，适量的预氧化剂均有利于藻类的混凝去除。这可能归因于细胞稳定性的下降；过量使用可能会导致细胞裂解和有机物的释放，这可能会干扰藻细胞的凝集。钙的存在进一步增强了预氧化对藻类混凝的有利作用；然而，这种现象对于使用高锰酸盐比使用臭氧更显著。推测这是因为带正电的钙离子可以作为桥梁将带负电的MnO2和藻细胞连接在一起。此外，这一行为也解释了高锰酸盐预氧化的性能优于在中试中使用臭氧去除藻类混凝的性能，因为源水含有高钙含量。(C)2008爱思唯尔有限公司。保留所有权利。
Both pilot and laboratory scale experiments are conducted to compare the effect of ozone and permanganate preoxidation on algae removal by alum coagulation. Both appropriately dosed preoxidants are shown to be beneficial to algae coagulation removal. This may be attributed to a decrease in cell stability; overdosing may cause cell lysis and the release of organics, which could interfere with algae cell however, coagulation. The presence of calcium further enhances the beneficial effect of preoxidation on algae coagulation; however, this phenomenon is more significant for using permanganate than ozone. It is speculated that this is due to the fact that the positively charged calcium ions can serve as bridges to hold the negatively charged MnO2 and algal cells together. Further, this behavior also explains the superior performance of permanganate preoxidation compared to that obtained using ozone for algae coagulation removal in pilot testing, as the source water contains high calcium content. (C) 2008 Elsevier Ltd. All rights reserved.