摘要
采用NaClO、UV-LED和UV-LED/NaClO工艺去除水中的对乙酰氨基酚(AAP),考察了NaClO投加量、pH值和腐殖酸(HA)等因素对UV-LED/NaClO工艺去除AAP的影响,研究了UV-LED/NaClO去除AAP过程中OH·、UV-LED、NaClO和氯自由基RCS(Cl·,Cl2·^-,ClO·)的贡献值,评估了AAP降解过程中溶液急性毒性的变化.结果表明,UV-LED/NaClO可以有效降解.AAP.反应90min后,UV-LED、NaClO和UV-LED/NaClO工艺对AAP的去除率分别为4.42%、93.61%和100%.AAP的降解符合拟一级反应动力学模型(R^2=0.9967).AAP的去除随着NaClO投加量的增大而增加,中性条件有利于AAP的降解,HA对AAP去除具有抑制作用,HCO3^-和NO3^-可略微促进AAP的去除.当NaClO投加量为1mg/L,OH·、UV-LED、NaClO和RCS各组分对AAP去除的相对贡献率分别为0.82%、0.66%、33.78%和64.74%,UV-LED/NaClO工艺可以有效的降低溶液的急性毒性.
The degradation of acetaminophen(AAP)in aqueous solution by NaClO,UV-LED and UV-LED/NaClO was investigated,the influences of several factors such as NaClO dosage,pH values and humic acid(HA)on AAP degradation by UV-LED/NaClO process were discussed.Contributions of hydroxyl radical(OH·),UV-LED irradiation,NaClO and free chlorine radical RCS(Cl,Cl2·^-,ClO·)AAP degradation also studied.Variation of acute toxicity of reacted solution was evaluated.The results indicated that AAP was removed effectively during UV-LED/NaClO process.After reaction of 90min,UV-LED irradiation,NaClO and UV-LED/NaClO processes for AAP removal were found to be 4.42%,93.61%and 100%,respectively.The AAP degradation well fitted with the pseudo-first-order kinetics model(R^2=0.9967).The removal of AAP increased with the increasing of NaClO dosage,neutral condition was conducive to AAP degradation.AAP removal was inhibited in the presence of HA.HCO3^-and NO3^-could slightly promote the removal of AAP.When the dosage of NaClO was 1mg/L,the relative contribution rates of OH·,UV-LED,NaClO and RCS radicals in the degradation of AAP were 0.82%,0.66%,33.78%and 64.74%,respectively.The UV-LED/NaClO process can decrease the acute toxicity of the solution effectively.
作者
李博强
马晓雁
李青松
廖文超
陈彦洁
陈国元
李国新
LI Bo-qiang;MA Xiao-yan;LI Qing-song;LIAO Wen-chao;CHEN Yan-jie;CHEN Guo-yuan;LI Guo-xin(College of Civil Engineering and Architecture,Zhejiang University of Technology,Hangzhou 310014,China;Water Resource and Environment Institute,Xiamen University of Technology,Xiamen 361005,China;College of Health Science and Environmental Engineering,Shenzhen Technology University,Shenzhen 518118,China;School of Environmental Science and Engineering,Qingdao University,Qingdao 266022,China)
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2019年第11期4681-4688,共8页
China Environmental Science
基金
国家自然科学基金资助项目(51878582,51678527,51378446)
福建省科技计划引导性资助项目(2017Y0079)
福建省自然科学基金项目(2017J01491)
福建省高校新世纪优秀人才支持计划项目(JA14227)
