吕丽萍,乔俊莲,张龙.高锰酸钾预氧化强化混凝去除螺旋鱼腥藻的研究[J].环境科学学报,2015,35(9):2820-2825
高锰酸钾预氧化强化混凝去除螺旋鱼腥藻的研究
- Enhancement of the coagulation in removing the Anabaena spiroides by potassium permanganate pre-oxidation
- 基金项目：上海市科委项目(No.14231200400)
- 吕丽萍
- 同济大学环境科学与工程学院, 上海 200092
- 乔俊莲
- 1. 同济大学环境科学与工程学院, 上海 200092;2. 同济大学污染控制与资源化研究重点实验室, 上海 200092
- 张龙
- 1. 同济大学环境科学与工程学院, 上海 200092;2. 同济大学污染控制与资源化研究重点实验室, 上海 200092
- 摘要：以水华优势藻螺旋鱼腥藻为对象,研究不同高锰酸钾浓度氧化下,藻光合作用能力,藻液中Mn浓度,胞外有机物三维荧光和分子量分布的变化.研究发现高锰酸钾氧化作用主要在1 h内完成,1 h后藻液中残余Mn的含量达到1.23%~5.98%.藻光合能力随着高锰酸钾浓度上升而下降,随着高锰酸钾浓度升高,藻细胞分泌更多胞外有机物,同时藻细胞受到破坏,生成消毒副产物的前驱物腐殖酸.高锰酸钾预氧化1 h后进行混凝实验发现,藻的去除率显著升高,比直接混凝增加33.99%~36.35%.
- Abstract：Different concentrations of potassium permanganate were added into anabaena spiroides, one of the dominant algae in water bloom, to investigate the effect on the algae characteristics, including photosynthesis ability, Mn concentration in algae solution and the changes in extra-cellular organic matter three-dimensional fluorescence and the distribution of molecular weight. The results show that the oxidation of potassium permanganate is mostly completed within one hour, with the content of residual Mn of 1.23%~5.98%. Along with increasing concentration of potassium permanganate, the photosynthesis ability of algae decreases, more extracellular organic matter is secreted and the cell is destroyed, generating humic acid, the precursor of disinfection by-products. The coagulation results show that the removal rate significantly increases after pre-oxidation for 1 h, 33.99%~36.35% higher than direct coagulation.
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