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Immediate and long-term impacts of potassium permanganate on photosynthetic activity, survival and microcystin-LR release risk of Microcystis aeruginosa

机译：高锰酸钾对铜绿微囊藻光合活性，存活和微囊藻毒素-LR释放风险的立即和长期影响

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摘要

The immediate and long-term impacts of potassium permanganate (KMnO_4) as pre-oxidant on Microcystis aeruginosa and microcystin-LR (MC-LR) release risk were investigated. The cell density and the integrity of M. aeruginosa were determined by a flow cytometry, and typical photosynthetic parameters were measured by a pulse amplitude modulated fluorometer. The photosynthetic parameters were reduced to different degrees, accompanied with slight cytoclasis and complete degradation of extracellular MC-LR immediately after various dosages KMnO_4 oxidation (2-20 mg L~(-1)). In a 6-d cultivation following 5 mg L~(-1) KMnO_4 oxidation, the cell density decreased from 3.9 × 10~6 to 0.6 × 10~6 cells mL~(-1), and then increased to 0.9 × 10~6 cells mL~1, while the extracellular MC-LR increased from 0 to 51.2μ.gL~(-1). In the cultivation after 10mgL~(-1) KMnO_4 treatment, the intracellular MC-LR and cell activity significantly declined, while significant cytoclasis (cell density from 3.8 x 10~6 to 0 cells mL~(-1)) and MC-LR release (increase from 0 to 15.2 μg L~(-1)) were observed. The photosynthetic parameters were found to be useful tools to predict the recovery tendency of M. aeruginosa cells, and the MC-LR release risk should be considered during KMnO_4 pre-oxidation in water-treatment plants.
机译：研究了高锰酸钾（KMnO_4）作为预氧化剂对铜绿微囊藻和微囊藻毒素-LR（MC-LR）释放风险的近期和长期影响。通过流式细胞仪确定铜绿假单胞菌的细胞密度和完整性，并通过脉冲幅度调制荧光计测量典型的光合作用参数。在不同剂量的KMnO_4氧化（2-20 mg L〜（-1））后，光合参数不同程度地降低，伴随着轻微的细胞溶解和细胞外MC-LR的完全降解。在5 mg L〜（-1）KMnO_4氧化后的6 d培养中，细胞密度从3.9×10〜6降至0.6×10〜6细胞mL〜（-1），然后增加到0.9×10〜 6个细胞mL〜1，而细胞外MC-LR从0增加到51.2μg.gL〜（-1）。在10mgL〜（-1）KMnO_4处理后的培养中，细胞内MC-LR和细胞活性显着下降，而细胞裂解显着（细胞密度从3.8 x 10〜6到0细胞mL〜（-1））和MC-LR释放（从0增加到15.2μgL〜（-1））。发现光合参数是预测铜绿假单胞菌细胞恢复趋势的有用工具，在水处理厂中，KMnO_4预氧化过程中应考虑MC-LR释放风险。

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  • 来源
    《Journal of Hazardous Materials》 |2012年第15期|p.267-275|共9页
  • 作者

    Huase Ou; Naiyun Gao; Chaohai Wei; Yang Deng; Junlian Qiao;

  • 作者单位

    State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China;

    State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China;

    College of Environmental Science and Engineering, South China University ofTechnology, Guangzhou 510006, China;

    Department of Earth and Environmental Studies, Montclair State University, Montclair, NJ 07043, United States;

    State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    potassium permanganate; cyanobacteria; photosynthesis; microcystis aeruginosa; microcystin-LR;

    机译：高锰酸钾;蓝细菌光合作用;铜绿微囊藻;微囊藻毒素;

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