Ines Nițoi, L. Constantin, I. Cristea, M. Constantin
{"title":"ADVANCED OXIDATION PROCESSES (AOPS) ALTERNATIVE METHODS FOR DEGRADATION OF TOXIC POLLUTANTS FROM WASTEWATER","authors":"Ines Nițoi, L. Constantin, I. Cristea, M. Constantin","doi":"10.21698/rjeec.2019.105","DOIUrl":null,"url":null,"abstract":"The degradation of some toxic pollutants like chlorobenzenes, nitrobenzene and 4-chloroaniline in various advanced oxidation system such as: UV/ H2O2, UV-VIS/Fe-TiO2 and UV-VIS/TiO2/ H2O2 were studied. The influence of working conditions (pH0, H2O2 dose, photocatalyst dose, pollutant initial concentration and irradiation time) on pollutant degradation rate constant and efficiency were investigated. For any studied advanced oxidation systems, pollutant degradation followed a pseudo first order kinetics. The degradation pathway of chlorinated and nitro aromatic pollutants includes initial •OH radicals attack to aromatic ring with hydroxylated intermediates formation, followed by their step by step oxidation up to carboxylic acids. Inorganic ions like Cl-, NO3-, NH4+ are also formed as mineralization products.","PeriodicalId":21370,"journal":{"name":"Romanian Journal of Ecology & Environmental Chemistry","volume":"3 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2019-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Romanian Journal of Ecology & Environmental Chemistry","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.21698/rjeec.2019.105","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
The degradation of some toxic pollutants like chlorobenzenes, nitrobenzene and 4-chloroaniline in various advanced oxidation system such as: UV/ H2O2, UV-VIS/Fe-TiO2 and UV-VIS/TiO2/ H2O2 were studied. The influence of working conditions (pH0, H2O2 dose, photocatalyst dose, pollutant initial concentration and irradiation time) on pollutant degradation rate constant and efficiency were investigated. For any studied advanced oxidation systems, pollutant degradation followed a pseudo first order kinetics. The degradation pathway of chlorinated and nitro aromatic pollutants includes initial •OH radicals attack to aromatic ring with hydroxylated intermediates formation, followed by their step by step oxidation up to carboxylic acids. Inorganic ions like Cl-, NO3-, NH4+ are also formed as mineralization products.
研究了UV/ H2O2、UV- vis /Fe-TiO2和UV- vis /TiO2/ H2O2等高级氧化体系对氯苯、硝基苯和4-氯苯胺等有毒污染物的降解。考察了工作条件(pH0、H2O2剂量、光催化剂剂量、污染物初始浓度和照射时间)对污染物降解速率常数和效率的影响。对于任何研究的高级氧化系统，污染物降解遵循伪一级动力学。氯代和硝基芳香族污染物的降解途径是:初始•OH自由基攻击芳香族环，形成羟基化中间体，然后逐步氧化生成羧酸。矿化产物还形成Cl-、NO3-、NH4+等无机离子。
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
