电化学法处理香料工业氯化钠有机废盐的研究  

Study on electrochemical treatment of sodium chloride organic waste salt in spice industry

作　　者：姚健康 胡硕真 钮东方[1] 吴建平 张新胜[1] YAO Jiankang;HU Shuozhen;NIU Dongfang;WU Jianping;ZHANG Xinsheng(State Key Laboratory of Chemical Engineering,East China University of Science and Technology,Shanghai 200237,China;Shanghai Ruiyuan Chemical Technology Co.,Ltd.,Shanghai 200231,China)

机构地区：[1]华东理工大学化学工程联合国家重点实验室,上海200237 [2]上海瑞元化学科技有限公司,上海200231

出　　处：《无机盐工业》2024年第3期105-115,共11页Inorganic Chemicals Industry

摘　　要：为了实现氯化钠有机废盐的资源化利用,以某香料企业的氯化钠有机废盐为研究对象,在单室电化学氧化的基础上提出了一种资源化处理氯化钠废盐的一膜两室电解工艺,在降解废盐有机物的同时获取氢氧化钠。在单室电解槽中探究了废盐中有机物的电化学氧化降解条件和降解途径,研究表明,在电流密度为600 A/m^(2)、反应温度为35℃、初始pH为6的最佳电解条件下,电解8 h后废盐模拟废水化学需氧量(COD)去除率为92.3%,色度去除率为100%,电流效率为32.3%。有机物降解的主要途径为电极产生的活性氯和羟基自由基对有机物的间接氧化。通过调节阳极液pH和进料方式,在相同电解条件下电解8 h,一膜两室工艺阳极COD去除率可达87.2%,阴极氢氧化钠总产量可达11.33 g。该工艺具有反应条件温和、工艺流程简单及无二次污染等特点,可为氯化钠有机废盐的资源化处理提供参考。In order to achieve the resource utilization of sodium chloride organic waste salt,the sodium chloride organic waste salt from a spice enterprise was took as the research object,and a twochamber electrolysis process for resource treatment of sodium chloride organic waste was proposed based on the single chamber electrochemical oxidation,which could obtain sodium hydroxide while degrading the organic matter in the waste salt.The electrochemical oxidation degradation conditions and pathways of organic compounds in waste salt were investigated in a single chamber electrolytic cell.The research results showed that under the optimal electrolysis conditions of current density of 600 A/m^(2),reaction temperature of 35℃,and initial pH of 6,after 8 h of electrolysis,the chemical oxygen demand(COD)removal rate of wastewater was 92.3%,the chroma removal rate was 100%,the current efficiency was 32.3%,respectively.The degradation pathways of organic pollutants were mainly through the indirect oxidation of active chlorine and hydroxyl radicals generated on the anode.By adjusting the pH of the anolyte and the feeding method,under the same electrolysis conditions,after 8 h of electrolysis,the COD removal rate of anode wastewater in the twochamber process could reach 87.2%,and the total output of cathode sodium hydroxide could reach 11.33 g.This process had the characteristics of mild reaction conditions,simple process flow,and no secondary pollution.This study could provide reference for the resource utilization of sodium chloride organic waste salts.

关 键 词：电化学 氯化钠有机废盐 有机物降解途径 资源化 

分 类 号：TQ131.12[化学工程—无机化工]