摘要
采用改良的Hummers法制备了氧化石墨烯(GO),探究了GO-过硫酸盐(PS)联合去除水中四溴双酚S(TBBPS)的效果。结果表明,制得的GO具有优良的吸附性能和良好的催化活化作用,GO与PS的联合体系可有效去除水中的TBBPS。在反应温度为25℃、m(GO)∶m(PS)=2∶1时,经20 min反应后TBBPS的去除率可达到99.84%;在此基础上,适当地降低GO和PS的投加质量比、提高反应温度可提高TBBPS的去除率。液相氧化还原电位(ORP)和自由基检测结果表明,GO对PS有明显的活化作用,活化过程中会产生硫酸根自由基(SO-4·)和羟基自由基(·OH)。
Graphene oxide(GO)is prepared via modified Hummers method,and the removal effect of GO-persulfate(PS)on tetrabromo-bisphenol S(TBBPS)in water is studied.Study results show that the prepared GO has excellent adsorption performance and good catalytic oxidation.The combined action system of GO and PS can effectively remove TBBPS from water.The removal rate of TBBPS reaches 99.84%after 20 min of activation when the reaction temperature is 25℃,m(GO):m(PS)=2:1.On the basis,the removal rate of TBBPS can be increased by appropriately reducing the mass dosage ratio of GO to PS and increasing the reaction temperature.It is indicated through liquid phase redox potential and free radical detections that GO has an obvious activation effect on PS.Both SO-4·and·OH,two kinds of strongly oxidizing free radicals,are generated during the activation process.
作者
龚云姜
李玉兰
王崇均
李宇涵
王小平
GONG Yun-jiang;LI Yu-lan;WANG Chong-jun;LI Yu-han;WANG Xiao-ping(Chongqing Key Laboratory of New Materials for Catalysis and Environment,College of Environment and Resources,Chongqing Technology and Business University,Chongqing 400067,China;Pengshui Miao and Tujia Autonomous County Ecological Environment Monitoring Station,Chongqing 400067,China)
出处
《现代化工》
CAS
CSCD
北大核心
2023年第10期167-173,共7页
Modern Chemical Industry
基金
重庆市社会事业与民生保障科技创新专项项目(cstc2017shmsA20015)。
关键词
氧化石墨烯
过硫酸盐活化
四溴双酚S
高级氧化技术
硫酸根自由基
graphene oxide
persulfate activation
tetrabromo-bisphenol S
advanced oxidation technology
sulfate radical
