萃取-Fenton氧化组合工艺高效处理羟肟酸类选矿药剂生产废水研究  

Study on High-Efficient Treatment of Hydroxamic Acid Wastewater by Extraction Combined with Fenton Oxidation Technology

作　　者：韩雷 张发明 罗云波 齐越超 龙来寿[4] 张绍青 HAN Lei;ZHANG Faming;LUO Yunbo;QI Yuechao;LONG Laishou;ZHANG Shaoqing(Guangzhou Yueyouyan Mineral Resources Technology Co.,Ltd.,Guangzhou Guangdong 510650,China;Institute of Resource Utilization and Rare Earth Development,Guangdong Academy of Sciences,Guangzhou Guangdong 510650,China;State Key Laboratory of Rare Metal Separation and Comprehensive Utilization,Guangzhou Guangdong 510650,China;School of Chemistry and Civil Engineering,Shaoguan University,Shaoguan Guangdong 512005,China)

机构地区：[1]广州粤有研矿物资源科技有限公司,广东广州510650 [2]广东省科学院资源利用与稀土开发研究所,广东广州510650 [3]稀有金属分离与综合利用国家重点实验室,广东广州510650 [4]韶关学院化学与土木工程学院,广东韶关512005

出　　处：《当代化工》2024年第11期2689-2692,2719,共5页Contemporary Chemical Industry

基　　金：国家自然科学基金项目(项目编号:52200065)。

摘　　要：针对羟肟酸类选矿药剂生产废水高COD、难降解等特点,采用液-液萃取联合Fenton氧化工艺进行了高效处理研究。系统地考察了萃取过程中萃取液组成、废水pH、萃取相比(有机相与水相体积比,即V(O)/V(A))对COD去除率的影响及Fenton氧化技术处理过程中萃余相pH、H2O2浓度、Fe^(2+)与H_(2)O_(2)物质的量比对萃余相COD去除率的影响。结果表明:在V(N235)∶V(煤油)∶V(正辛醇)=7∶2∶1、废水pH为3、V(O)/V(A)为1∶1的条件下,羟肟酸类生产废水经萃取法处理后,COD由136780 mg·L^(-1)降低至39260 mg·L^(-1),去除率为71.30%;在萃余相pH为3、H_(2)O_(2)浓度为200 mmol·L^(-1)、n(Fe^(2+))∶n(H_(2)O_(2))=1∶4的条件下,萃余相经Fenton氧化技术处理后,COD由39260 mg·L^(-1)降低至7200 mg·L^(-1),去除率为81.66%;萃取法联合Fenton氧化工艺处理羟肟酸类选矿药剂生产废水COD综合去除率达94.74%。此法操作简单,技术上可行,可为同类废水的高效处理提供参考。In view of the problems such as high COD and difficult degradation of hydroxamic acid production wastewater,liquid-liquid extraction combined with Fenton oxidation technology was used for high efficiency treatment.The effects of extraction liquid composition,pH of wastewater and the volume ratio of organic phase to water phase V(O)/V(A)on COD removal rate of the wastewater in the extraction process,as well as the effects of pH of extractive phase,amount of H_(2)O_(2)and molar ratio of Fe^(2+)to H_(2)O_(2)on COD removal rate of extractive phase in Fenton oxidation process were systematically investigated.The results showed that under the optimum conditions of V(N235)∶V(kerosene)∶V(n-octanol)=7∶2∶1,pH of wastewater was 3,and V(O)/V(A)was 1∶1,the COD of hydroxamic acid production wastewater was reduced from 136780 mg·L^(-1)to 39260 mg·L^(-1)by extraction,and the removal rate reached 71.30%.Under the suitable conditions of raffinate phase pH=3,H_(2)O_(2)dosage 200 mmol·L^(-1),n(Fe^(2+))∶n(H_(2)O_(2))=1∶4,after Fenton oxidation treatment,COD of raffinate phase decreased from 39260 mg·L^(-1)to 7200 mg·L^(-1),and the removal rate reached 81.66%.The comprehensive COD removal rate of hydroxamic acid wastewater treated by extraction method combined with Fenton oxidation technology was 94.74%.The process is simple in operation and technically feasible,and can provide reference for the efficient treatment of similar wastewater.

关 键 词：羟肟酸类废水 萃取 FENTON氧化 化学需氧量 

分 类 号：TQ085.4[化学工程]