摘要
高级氧化技术(AOPs)对有机物有显著的降解能力,尤其对含有农药、染料、药物与个人护理品等难降解有机污染物废水的处理效果较好。研究者将AOPs引入有机废水的处理过程中。在AOPs降解有机污染物的研究中,常需要添加猝灭剂终止反应,以获得实验数据。探讨了不同种类猝灭剂对基于硫酸根自由基(SO_(4)^(·-))和羟基自由基(·OH)的2种高级氧化体系的猝灭效果。用二价铁活化过硫酸盐法(Fe^(2+)/PS)与Fenton法(Fe^(2+)/H_(2)O_(2))获得SO_(4)^(·-)和·OH,以罗丹明B(RhB)作为降解物,对比研究了亚硫酸钠(Na_(2)SO_(3))、亚硝酸钠(NaNO_(2))、抗坏血酸(AA)、甲醇(MeOH)、乙醇(EtOH)和叔丁醇(TBA)作为猝灭剂的猝灭效果。实验结果显示,在SO_(4)^(·-)氧化体系中,NaNO_(2)和AA的猝灭效果较好;而·OH氧化体系下,NaNO_(2)、MeOH、EtOH和TBA的猝灭效果更佳。
Advanced oxidation process(AOPs)has significant degradation ability for organic pollutants,especially for refractory organic pollutant wastewater containing pesticides,dyes,pharmaceutical and personal care products.The researchers used AOPs for the treatment of organic wastewater.In the study of organic pollutants degradation by AOPs,it is often necessary to add quenching agent to terminate the reaction in order to obtain experimental data.The quenching effects of different quenchers on two kinds of advanced oxidation systems which based on SO_(4)^(·-)and·OH were explored.SO_(4)^(·-)and·OH were generated via the activation of persulfate by Fe^(2+)(Fe^(2+)/PS)and the Fenton process(Fe^(2+)/H_(2)O_(2))respectively.Then with Rhodamine B as the degraded target compound,the quenching effect of six quenching agents including sodium sulfite(Na_(2)SO_(3)),sodium nitrite(NaNO_(2)),ascorbic acid(AA),methanol(MeOH),ethanol(EtOH)and tert-butyl alcohol(TBA)were compared.The experimental results showed that NaNO_(2) and AA had better quenching effect in the SO_(4)^(·-)oxidation system,while in the·OH oxidation system,the quenching effect of NaNO_(2),MeOH,EtOH and TBA was favorable.
作者
白孟琦
李敏睿
丁欣欣
王玉如
Bai Mengqi;Li Minrui;Ding Xinxin;Wang Yuru(Department of Environmental Science,School of Geography and Tourism,Shaanxi Normal University,Xi’an 710119,China)
出处
《工业水处理》
CAS
CSCD
北大核心
2021年第8期75-80,共6页
Industrial Water Treatment
基金
国家自然科学基金项目(51508317)
中央高校基本科研业务费项目(GK201802018)
中国博士后科学基金(2016M602762)
陕西省博士后科研项目(2017BSHTDZZ09)。
作者简介
白孟琦(1996—),硕士,E-mail:Baymax@snnu.edu.cn;通讯作者:王玉如,博士,副教授,E-mail:wangyuru@snnu.edu.cn。
