Characterization and biotoxicity assessment of dissolved organic matter in RO concentrate from a municipal wastewater reclamation reverse osmosis system
作者： Ying-Xue Sun , Yue Gao , Hong-Ying Hu , Fang Tang , Zhe Yang
DOI: 10.1016/J.CHEMOSPHERE.2014.09.024
关键词: Reverse osmosis 、 Wastewater 、 Genotoxicity 、 Land reclamation 、 Chromatography 、 Excitation emission matrix 、 Fluorescence spectra 、 Environmental risk 、 Chemistry 、 Dissolved organic carbon
摘要: Abstract Reverse osmosis (RO) concentrate from municipal wastewater reclamation reverse (mWRRO) system containing organic compounds may associate with toxic risk, and its discharge might pose an environmental risk. To identify a basis for the selection of feasible technology in treating RO concentrates, characteristics biotoxicity different fractions dissolved matter (DOM) concentrates mWRRO were investigated. The results indicated that hydrophilic neutrals (HIN), hydrophobic acids (HOA) bases (HOB) accounted 96% carbon (DOC) total DOM concentrate. According to SEC chromatograph detected at 254 nm wavelength UV, molecular weight (MW) 1–3 kDa majority basic neutral fractions. fluorescence spectra excitation emission matrix (EEM) most aromatic proteins, humic/fulvic acid-like soluble microbial by-product-like substances existed HOA (HON). genotoxicity anti-estrogenic activity 1795.6 ± 57.2 μg 4-NQO L −1 2.19 ± 0.05 mg TAM L , respectively. HIN, HOA, HOB contributed concentrate, HIN was highest genotoxic level 1007.9 ± 94.8 μg 4-NQO L . HON, lead occupied approximately 60% total, which 1.3 ± 0.17 mg TAM L
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