电化学协同过硫酸盐氧化法处理含盐有机废水  

Electrochemical synergistic persulfate oxidation process for treatment of salty organic wastewater

作　　者：陈希 纪志永[1,2,3,4] 黄智辉 赵颖颖[1,2,4] 刘杰 袁俊生 CHEN Xi;JI Zhiyong;HUANG Zhihui;ZHAO Yingying;LIU Jie;YUAN Junsheng(National-Local Joint Engineering Laboratory of Chemical Energy Saving Process Integration and Resource Utilization,School of Chemical Engineering and Technology,Hebei University of Technology,Tianjin 300130,China;Engineering Research Center of Seawater Utilization of Ministry of Education,School of Chemical Engineering and Technology,Hebei University of Technology,Tianjin 300130,China;State Key Laboratory of Petroleum Pollution Control,Beijing 102206,China;Hebei Collaborative Innovation Center of Modern Marine Chemical Technology,Tianjin 300130,China)

机构地区：[1]河北工业大学化工学院,化工节能过程集成与资源利用国家-地方联合工程实验室,天津300130 [2]河北工业大学化工学院,海水资源高效利用化工技术教育部工程研究中心,天津300130 [3]石油石化污染物控制与处理国家重点实验室,北京102206 [4]河北省现代海洋化工技术协同创新中心,天津300130

出　　处：《化工进展》2019年第12期5572-5577,共6页Chemical Industry and Engineering Progress

基　　金：国家重点研发计划(2016YFB0600504);河北省青年拔尖人才支持计划(2016-9)

摘　　要：近年来,随着煤化工行业不断发展,废水排放量加大。煤化工行业废水排放量大、高盐和高化学需氧量的现状使得对其的处理成为一大热点和难点。本文以伊犁某工厂实际含盐有机废水(TDS含量25000mg/L)成分为依据,选取2-甲氧基苯酚作为煤化工废水中典型有机物,采用电化学协同过硫酸盐法处理含盐有机废水,主要考察电压、初始过硫酸钠浓度、极板间距及初始pH对2-甲氧基苯酚降解率的影响。结果表明,综合考虑电能消耗及氧化剂成本,在2V电压、极板间距3cm、过硫酸钠投加量5g/L、pH=12以及反应3h条件下,2-甲氧基苯酚的降解率可达到97.5%,相较单一的电化学法或过硫酸盐氧化法均有显著提升,协同效应明显。本文研究结果为今后煤化工行业含盐有机废水的绿色高效处理提供了一种新的思路。In recent years, the discharge of wastewater has increased with the continuous development of coal chemical industry. Wastewater treatment has become a hot and difficult spot for the large emissions,high salt and high COD. Based on the actual ingredients of the salty organic wastewater(TDS content is25000 mg/L) from a plant located in Yili(Sinkiang), 2-methoxyphenol was chosen as a typical organic in coal chemical wastewater. The method of electrochemistry synergistic persulfate oxidation was investigated to degrade 2-methoxyphenol. The influence of voltage, initial concentration of sodium persulfate, electrode distances and initial pH on the degradation ratio of 2-methoxyphenol were discussed. Considering the electronic consumption and oxidant cost, the suitable degradation conditions of2-methoxyphenol were the voltage of 2 V, electrode distance of 3 cm, initial sodium persulfate concentration of 5 g/L, pH=12 and reaction time of 3 h, and the degradation ratio could reach 97.5%.Compared with the single method of electrochemistry or persulfate oxidation, this method has obvious improvement on the degradation of 2-methoxyphenol and shows a synergistic effect. These results could provide a new method on environmental and efficiency wastewater treatment of coal chemical industry in the future.

关 键 词：电化学 过硫酸盐氧化 协同 含盐有机废水 2-甲氧基苯酚 自由基 

分 类 号：X784[环境科学与工程—环境工程]