摘要
选取1-萘酚(1-NAP)为目标污染物,利用固体废弃物煤气化渣(CGS)活化过硫酸钠(PS)降解水中1-NAP,考察了CGS投加量、PS投加量、初始pH和共存物质等因素的影响,并对降解机理进行了分析。实验结果表明:在初始pH为3、CGS投加量为1.0 g/L、PS投加量为0.5 mmol/L的条件下反应25 min,1-NAP(5 mg/L)的去除率可达100%,降解过程符合准一级动力学模型,在一定范围内提高CGS和PS投加量均可有效提高1-NAP的去除率;共存阴离子HCO_(3)^(-)、SO_(4)^(2-)和Cl-对CGS活化PS降解1-NAP产生抑制作用,HCO_(3)^(-)的抑制作用最强,Cl-最弱;CGS活化PS产生活性自由基SO_(4)^(-)·和HO·,在降解过程中SO_(4)^(-)·起主要作用。
1-Naphthol(1-NAP)was selected as the target pollutant,and solid waste coal gasification slag(CGS)was used to activate persulfate(PS)to degrade 1-NAP in water.The effects of CGS amount,PS amount,initial pH and coexisting substances on the degradation of 1-NAP were investigated,and the degradation mechanism was analyzed.The experimental results show that:Under the conditions of initial pH 3,CGS amount 1.0 g/L,PS amount 0.5 mmol/L and reaction time 25 min,the removal rate of 1-NAP(5 mg/L)can reach 100%;The degradation process of 1-NAP conforms to pseudo first-order reaction kinetics,and the 1-NAP removal rate can be increased by properly increasing the amount of CGS and PS within a certain range;The coexisting anions HCO_(3)^(-),SO_(4)^(2-)and Cl-inhibit the degradation of 1-NAP,with HCO_(3)^(-)having the strongest inhibitory effect and Cl-having the weakest inhibitory effect;CGS activates PS to produce active radicals SO_(4)^(-)·and HO·,and SO_(4)^(-)·play a major role in the degradation process.
作者
郭凯
李亚男
王嘉琪
张国凯
牛莫男
GUO Kai;LI Yanan;WANG Jiaqi;ZHANG Guokai;NIU Monan(College of Environmental Science and Engineering,Taiyuan University of Technology,Jinzhong 030600,China;Chinasea Group Environmental Protection Engineering Co.,Ltd.,Taiyuan 030012,China)
出处
《化工环保》
CAS
CSCD
北大核心
2023年第5期676-683,共8页
Environmental Protection of Chemical Industry
基金
山西省应用基础研究计划项目(20210302123121)
自然资源部生态地球化学重点实验室开放基金项目(ZSDHJJ201804)
太原理工大学大学生创新创业训练计划项目(2022107)。
关键词
1-萘酚
煤气化渣
过硫酸盐
活性自由基
共存物质
1-naphthol
coal gasification slag
persulfate
active radical
coexisting substance
