کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6310445 | 1307469 | 2013 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Impact of potassium permanganate on cyanobacterial cell integrity and toxin release and degradation
ترجمه فارسی عنوان
تأثیر پرمنگنات پتاسیم بر سلول کامل سینوآب باکتریایی و انتشار و تخریب توکسین
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم محیط زیست
شیمی زیست محیطی
چکیده انگلیسی
Potassium permanganate (KMnO4) is commonly used as a pre-treatment oxidant to remove soluble manganese (Mn) and iron (Fe) which can contribute to dirty water in drinking water supplies. Because Mn and Fe problems are commonly associated with thermal stratification in summer and autumn, they frequently coincide with the presence of cyanobacteria. The use of KMnO4 as an oxidant for Mn and Fe control therefore needs to consider the potential impacts on cyanobacterial cell integrity and toxin release. This study aims to assess the effect of KMnO4 on cyanobacteria cell integrity, toxin release and toxin oxidation. A toxic strain of Microcystis aeruginosa was exposed to various concentrations of KMnO4 and the cell integrity of cyanobacteria was measured with flow cytometry. Further the intra- and extra-cellular toxin concentrations were quantified and it was apparent that KMnO4 reduced both the intra- and extra-cellular toxins at low initial concentrations of 1 and 3 mg Lâ1 without complete cell lysis. However, the cell integrity of cyanobacteria was compromised at KMnO4 concentrations of 5 mg Lâ1 and 10 mg Lâ1 and led to intracellular toxin release. In the 10 mg Lâ1 KMnO4 treatment, the total toxin was oxidised after 7 h contact time. A model describing the two step process of release and degradation was developed and may provide a tool to assess the risk water quality posed by toxin release. Consequently, it may be possible to use KMnO4 as a pre-treatment for Mn and Fe at concentrations <3 mg Lâ1 and short contact time when cyanobacteria are also present.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 92, Issue 5, July 2013, Pages 529-534
Journal: Chemosphere - Volume 92, Issue 5, July 2013, Pages 529-534
نویسندگان
Jiajia Fan, Robert Daly, Peter Hobson, Lionel Ho, Justin Brookes,