Hybrid peroxi-coagulation/ozonation process for highly efficient removal of organic contaminants  

作　　者：Shasha Li Jinxin Xie Jinyu Gu Minghua Zhou 

机构地区：[1]Key Laboratory of Pollution Process and Environmental Criteria,Ministry of Education,College of Environmental Science and Engineering,Nankai University,Tianjin 300350,China [2]Tianjin Key Laboratory of Environmental Technology for Complex Trans-Media Pollution,College of Environmental Science and Engineering,Nankai University,Tianjin 300350,China [3]Tianjin Advanced Water Treatment Technology International Joint Research Center,College of Environmental Science and Engineering,Nankai University,Tianjin 300350,China

出　　处：《Chinese Chemical Letters》2023年第10期86-92,共7页中国化学快报（英文版）

基　　金：supported by Natural Science Foundation of China(Nos.21976096 and 52170085);Key Project of Natural Science Foundation of Tianjin(No.21JCZDJC00320);National highlevel foreign experts project(Nos.QN20200002003,G2021125001 and G2021125002);Fundamental Research Funds for the Central Universities,Nankai University。

摘　　要：Aromatic compounds such as phenols presented widely in coal chemical industry wastewater(CCW)render the treatment facing great challenge due to their biorefractory characteristics and potential risks to the environment and human health.Ozone-based advanced oxidation processes show promising for these pollutants removal,but the mineralization via ozonation alone is unsatisfactory and not cost-effective.Herein,a hybrid peroxi-coagulation/ozonation process(denoted as PCO)was developed using sacrificial iron plate as an anode and carbon black modified carbon felt as cathode in the presence of ozonation.An enhanced phenol removal of∼100%within 20 min and phenol mineralization of∼80%within 60 min were achieved with a low energy consumption of 0.35 kWh/g TOC.In this novel process,synergistic effect between ozonation and peroxi-coagulation was observed,and beside O_(3) direct oxidation,peroxone played a dominant role for phenol removal.In the PCO process,the hydrolyzed Fe species enhanced the generation of reactive oxygen species(ROS),while•OH was dominantly responsible for pollutant degradation.This process also illustrated high resistance to high ionic strength and better performance for TOC removal in real wastewater when compared with ozonation and peroxi-coagulation process.Therefore,this process is more cost-effective,being very promising for CCW treatment.

关 键 词：Coal chemical industry wastewater Phenol removal Catalytic ozonation Peroxi-coagulation Reactive oxygen species 

分 类 号：X703[环境科学与工程—环境工程]