非均相硫酸根自由基深度处理焦化尾水研究  

Study on the Advanced Treatment of Coking Wastewater by Heterogeneous Sulfate Radical

作　　者：张智春[1,2] 岳秀萍 段燕青[1] 张潇 高艳娟[1] 饶竹 ZHANG Zhichun;YUE Xiuping;DUAN Yanqing;ZHANG Xiao;GAO Yanjuan;RAO Zhu(College of Environment Science and Engineering.Taiyuan University of Technology,Taiyuan 030006,China;Shanxi Construction Vocational and Technical College,Talyuan 030600,China;National Research Center for Geoanalysls,Beijing 100037,China)

机构地区：[1]太原理工大学环境科学与工程学院,山西太原030006 [2]山西建筑职业技术学院,山西太原030600 [3]国家地质实验测试中心,北京100037

出　　处：《水处理技术》2019年第2期57-60,66,共5页Technology of Water Treatment

基　　金：国家自然科学基金(NSFC51608345);山西省重点研发(R&D)项目(201603D321012)

摘　　要：采用固体催化剂激活过硫酸盐深度处理焦化尾水,研究了不同活化剂的活化性能,对比不同COD:ρ(Na_2S_2O_8)下COD的降解曲线,并进行化学反应动力学分析;通过气相色谱-质谱联用仪,分析焦化尾水中的难生物降解有机质的降解途径。结果表明,零价铁为最佳活化剂。降解过程优化的COD:ρ(Na_2S_2O_8)为1:6,此时COD降解率达到73%;色度降低至17倍,并对氰化物和硫氰化物具有优先攻击的选择性。硫酸根自由基(SO4·-)可破坏焦化尾水的生色团,有机物发生较大变化,苯酚被氧化为间甲酚、甲基苯酚等,喹啉、吲哚及其衍生物可被开环降解,但结构更加稳定的咔唑难以被氧化,反应产物具有絮凝作用,可进一步提高氧化反应出水水质。Solid catalyst activated persulfate was used for coking wastewater advanced treatment, the activation properties of different activators were studied, the degradation curve of COD with different COD:ρ(Na2S2O8) were compared, and the chemical reaction kinetics were analyzed. The degradation pathway of bio-refractory organic matters in coking wastewater was analyzed by gas chromatography-mass spectrometry. The results showed that the zero-valent iron(ZVI) was the best activator, the best COD:ρ(Na2S2O8) was 1:6, and the COD degradation rate reached 73%, the chroma decreased to 17 times. The cyanide and sulfur cyanide had the priority to be oxidized. Sulfate radical could destroy chromogen groups in coking wastewater, organic matters changed largely, phenol was oxidized into m-cresol and methy phenol, quinoline, indole and their derivatives were degraded in an open rings manner.Carbazole was difficult to oxidize because of its stable molecular structure. The effluent quality of coking wastewater can be further improved due to the flocculation of oxidation products.

关 键 词：焦化尾水 硫酸根自由基 非均相 絮凝作用 

分 类 号：X784[环境科学与工程—环境工程]