文献类型：期刊文献

英文题名：Interaction-sedimentation strategy for highly efficient removal of refractory humic substances in biologically treated wastewater effluent: from mechanistic investigation to full-scale application

作者：Wang, Yuan[1];Jin, Xibiao[1];Zhuo, Ningze[1];Zhu, Guoqiang[1];Cai, Zhengqing[1]

机构：[1]East China Univ Sci & Technol, Res Inst Environm Engn, Natl Engn Lab High Concentrat Refractory Organ Wa, Shanghai 200237, Peoples R China

年份：2021

卷号：418

外文期刊名：JOURNAL OF HAZARDOUS MATERIALS

收录：;EI(收录号：20212510529164);WOS:【SCI-EXPANDED(收录号:WOS:000689306900005)】；

基金：This study was financially supported by projects of National Natural Science Foundation of China (41807340) . Besides, the authors would like to thank all group members for their assistance of experiments.

语种：英文

外文关键词：Advanced treatment; Humic substances; Effluent organic matter; Biologically treated wastewater effluent; Carboxyl group

摘要：Based on the accurate characterization of the binding sites of humic substances (HS) and their binding coefficients with ferric ions (Fe(III)), a coupled interaction-sedimentation (CIS) technology was proposed for dealing with HS in the biologically treated wastewater effluent (BTWE) from a full-scale antibiotic production wastewater treatment plant. The infrared spectral and carbon-13 nuclear magnetic resonance characteristics showed that (i) protonated carboxyl groups in HS were the main binding sites for Fe(III) and HS, (ii) one carboxyl group of HS interacted with one ferric ion, (iii) the Fe(III)-binding ability of fulvic acids (FA) was 2.8 times as much as that of humic acids (HA) when FA and HA coexisted, and (iv) the presence of non-humic substances in the effluent organic matter (EfOM) amplified the Fe(III)-binding ability difference between FA and HA to 4.9 times. Afterwards CIS technology was successfully optimized and applied in engineering-scale and superior HS and EfOM removal efficiencies of 94.2% and 84.0% were reached, respectively. The CIS technology and its engineering application in this study not only fulfill the direct discharging standard for antibiotic production wastewater, but also have the potential for replication in broader advanced treatments for BTWE.