萃取-类Fenton氧化工艺处理硝基苯甲酸废水  

Nitrobenzoic Acid Wastewater Was Treated by A Combination of Extraction And Fenton-Like Oxidation

作　　者：熊健西 冯长生 蒋彩云[2] 王玉萍[1] XIONG Jianxi;FENG Changsheng;JIANG Caiyun;WANG Yuping(School of Chemistry and Material Science,Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control,Nanjing Normal University,Nanjing 210023,China;Department of Engineering and Technology,Jiangsu Institute of Commerce,Jiangsu Food Safety Engineering Technology Research and Development Center,Nanjing 210007,China)

机构地区：[1]南京师范大学化学与材料科学学院,江苏省物质循环与污染控制重点实验室,江苏南京210023 [2]江苏经贸职业技术学院工程技术系,江苏省食品安全工程技术研发中心,江苏南京210007

出　　处：《水处理技术》2020年第7期108-112,共5页Technology of Water Treatment

基　　金：国家自然科学基金(51578295);江苏省自然科学基金(BK20161479);江苏省高校自然科学研究项目(16KJB150043)。

摘　　要：以自制的WXF-1为萃取剂,采用络合萃取结合类Fenton氧化的方法处理含硝基苯甲酸废水。结果表明,络合萃取处理过程优化条件为:pH为0.8、络合剂的体积分数10%、油水体积比为0.2、反萃剂NaOH的质量分数为25%、有机相与反萃取相体积比20:1;类Fenton氧化过程中优化条件为:萃余水相pH为1.5、H2O2的体积分数为12 m L/L、Fe3O4催化剂的量1.5 g/L、反应温度60℃、反应时间2 h时。在此优化条件下,废水COD从最初的7 g/L左右降到0.3 g/L以下,COD的总去除率达到92.8%,满足企业后续处理的要求(COD<300 mg/L)。With self-made WXF-1 as extraction agent,nitrobenzoic acid wastewater was treated by complex extraction combined with Fenton-Like oxidation.The results showed that the optimal conditions for complexation extraction treatment were as follow,the pH was 0.8,the volume fraction of complexing agent was 10%,the oil-water volume ratio was 0.2,the mass fraction of the back-extraction agent NaOH was 25%,and the volume ratio of the organic phase to the back-extraction phase was 20:1;The optimal conditions for fenton-like oxidation were as follow,the pH of raffinose was 1.5,the volume fraction of H2O2 was 12 mL/L,the amount of Fe3O4 catalyst was 1.5 g/L,the reaction temperature was 60℃,and the reaction time was 2 h.Under this optimized condition,the COD of wastewater decreased from the original 7 g/L to less than 0.3 g/L,and the total removal rate of COD reached 92.8%,meeting the requirements of the subsequent treatment of the enterprise(COD<300 mg/L).

关 键 词：硝基苯甲酸废水 组合工艺 络合萃取 类FENTON氧化 COD 

分 类 号：X783[环境科学与工程—环境工程]