کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6584371 | 456361 | 2015 | 38 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Removal of p-nonylphenol isomers using nitrifying sludge in a membrane sequencing batch reactor
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
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چکیده انگلیسی
The aim of this study was to assess p-nonylphenol removal mechanisms under nitrifying conditions in a bioreactor system. The removal of a technical mixture of p-nonylphenol isomers was evaluated in a membrane sequencing batch reactor without the addition of an organic carbon source in enriched nitrifying sludge. The p-nonylphenol concentration was quantified in the liquid and solid phases to accurately differentiate between biodegradation and sorption mechanisms. The predominant removal mechanism was p-nonylphenol biodegradation (62%), followed by sorption, which resulted in a total removal of 96%. In addition, ammonium-oxidizing microorganisms controlled the biodegradation of p-nonylphenol, and 1,2-benzenedicarboxylic acid, mono(2-ethylhexyl)ester was identified as the main intermediary metabolite. These results suggested that co-metabolic biodegradation by heterotrophic microorganisms is necessary to completely mineralize p-NP isomers under nitrifying conditions. This study provides an important contribution to existing knowledge of nonylphenol biodegradation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volume 281, 1 December 2015, Pages 860-868
Journal: Chemical Engineering Journal - Volume 281, 1 December 2015, Pages 860-868
نویسندگان
Germán Buitrón, Angeles X. Torres-Bojorges, Glenda Cea-Barcia,