文献类型：期刊文献

英文题名：Toxicity in different molecular-weight fractions of sludge treating synthetic wastewater containing 4-chlorophenol

作者：Zhao, Jianguo[1];Chen, Xiurong[1];Zhao, Jun[1];Lin, Fengkai[1];Bao, Zheng[1];He, Yixuan[1];Wang, Lu[1];Shi, Zhendong[1]

机构：[1]E China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asse, Shanghai 200237, Peoples R China

年份：2015

卷号：104

起止页码：251

外文期刊名：INTERNATIONAL BIODETERIORATION & BIODEGRADATION

收录：;EI(收录号：20152700994209);WOS:【SCI-EXPANDED(收录号:WOS:000362308400036)】；

基金：This research was supported by the National Natural Science Foundation (No. 51378207), the National Science Foundation for Distinguished Young Scholars of China (No. 51125032), the Shanghai Pujiang Programme (No. 13PJD009) and the Major Projects of Science and Technology (No. 2014ZX07202-011) in China.

语种：英文

外文关键词：Sludge toxicity; 4-Chlorophenol; Adsorption and biodegradation; Molecular-weight distribution; Synthetic wastewater

摘要：This study investigated sludge toxicity in removal of 4-chlorophenol (4-CP) in reactor system with addition of methanol. The toxicity was evaluated in two sequential batch reactors (SBRs), namely acclimated sludge reactor with addition of 10 mg l(-1) 4-CP and control sludge reactor without 4-CP addition. Results showed that even though 4-CP both in aqueous and sludge phases was undetectable, the toxicity of the acclimated sludge was still higher than the control sludge, which was assessed with Photobacterium phosphoreum (P. phosphoreum). Adsorption and biodegradation assays indicated that secondary metabolites from microorganism also contributed to sludge toxicity in addition to 4-CP itself. The different molecular-weight (MW) distribution of organic substances in sludge analysis validated that the mass fractions of TOC at >10 K and 10 K-500 were significantly related to the sludge toxicity. (c) 2015 Elsevier Ltd. All rights reserved.