کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7021213 | 1456006 | 2015 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of feedwater pre-treatment using UV/H2O2 for mitigating the fouling of a ceramic MF membrane caused by soluble algal organic matter
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
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چکیده انگلیسی
Soluble algal organic matter (AOM) resulting from cyanobacterial blooms can cause severe fouling for water treatment membranes as it contains a large proportion of high molecular weight (MW) organics such as biopolymers and humic-like substances. UV/H2O2 advanced oxidation of feedwater containing AOM derived from Microcystis aeruginosa was investigated as a means of mitigating the fouling of a ceramic microfiltration (MF) membrane and degrading the algal toxin microcystin-LR. The result was compared with the pre-treatment using coagulation with ACH. UV/H2O2 treatment and coagulation achieved a marked and comparable reduction in total fouling resistance, however coagulation led to considerably lower irreversible fouling. The significant reduction in membrane fouling by the pre-treatments was attributed to the effective breakdown/removal of the very high MW biopolymers (â¥20,000 Da) and high MW organic substances (~10,000 Da) in the AOM. UV/H2O2 treatment resulted in the generation of lower MW substances due to partial oxidation of the large molecules, and consequently greater irreversible membrane fouling compared with coagulation. Microcystin-LR was completely inactivated by UV/H2O2, whereas coagulation was ineffective for removing it.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 493, 1 November 2015, Pages 683-689
Journal: Journal of Membrane Science - Volume 493, 1 November 2015, Pages 683-689
نویسندگان
Xiaolei Zhang, Linhua Fan, Felicity A. Roddick,