引用本文
  • 鲁蓝锶,陈际达,鄢婷,付登林,文亚男,邓智博,张柔.催化臭氧氧化降解PCB有机废液及其机理[J].环境工程学报,2019,13(9):2130-2141.DOI:10.12030/j.cjee.201812170    [点击复制]
  • LU Lansi,CHEN Jida,YAN Ting,FU Denglin,WEN Yanan,DENG Zhibo,ZHANG Rou.Performance and mechanism of PCB organic effluents degradation by catalytic ozonation[J].,2019,13(9):2130-2141.DOI:10.12030/j.cjee.201812170   [点击复制]
【打印本页】 【在线阅读全文】【下载PDF全文】 查看/发表评论下载PDF阅读器关闭

←前一篇|后一篇→

过刊浏览    高级检索

本文已被:浏览次   下载 本文二维码信息
码上扫一扫!
催化臭氧氧化降解PCB有机废液及其机理
鲁蓝锶, 陈际达, 鄢婷, 付登林, 文亚男, 邓智博, 张柔
0
(重庆大学化学化工学院,重庆 401331)
摘要:
为了高效、快速治理高浓度难降解PCB(printed circuit board)有机废液,研究了氧化钙非均相催化臭氧氧化降解PCB废液的催化机理和催化性能。采用叔丁醇淬灭自由基实验和水杨酸羟基化实验探究催化机理;通过GC/MS研究了PCB废液中有机物可能降解途径;通过单纯形优化法对实验因素进行优化,并通过XRD和BET探究催化剂的循环稳定性。结果表明:氧化钙非均相催化臭氧氧化过程遵循羟基自由基机理;在pH为12.97、CaO质量为1.0 g、废液深度为11 cm、降解时间为150 min、臭氧用量为120 mg·min-1时,COD去除率可达到90.045%;氧化钙经过5次循环后,废液的COD去除率没有显著降低,从92.78%降低至84.04%。CaO应用于催化臭氧氧化过程处理高浓度且难降解的PCB废液,能维持良好的催化性能和循环稳定性,具有良好的应用前景。
关键词:  催化臭氧氧化  氧化钙  PCB废液  羟基自由基
DOI:10.12030/j.cjee.201812170
投稿时间:2018-12-25
基金项目:
Performance and mechanism of PCB organic effluents degradation by catalytic ozonation
LU Lansi, CHEN Jida, YAN Ting, FU Denglin, WEN Yanan, DENG Zhibo, ZHANG Rou
(School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China)
Abstract:
In order to high efficiently and rapidly treat refractory organic effluent generated during manufacturing printed circuit boards (PCB) with high concentration, the performance and mechanism of PCB organic effluents degradation by heterogeneously catalytic ozonation with CaO were studied. The catalytic mechanism was investigated by radical quenching test with tert-butanol and hydroxylation test of salicylic acid. The possible degradation pathway of organic matter was studied by GC/MS. The experimental factors were optimized by simplex optimization method, and the cycle stability of the catalyst was explored by XRD and BET. The results showed that the catalytic ozonation process in the presence of calcium oxide followed hydroxyl radicals mechanism. The COD removal efficiency could reach 90.045% at the pH of 12.97, CaO mass of 1.0 g, the solution height of 11 cm, the degradation time of 150 min, and the ozone dosage of 120 mg·min-1. After five cycles, the COD removal ratio of organic matter decreases insignificantly, which changes from 92.78% to 84.04%. CaO can maintain a good catalytic performance and recycle stability during treating refractory organic industrial wastewater with high concentration, which confirms its good prospect in this field.
Key words:  catalytic ozonation  calcium oxide  PCB effluents  hydroxyl radicals