摘要
该文以偶氮染料酸性橙7(AO7)为目标污染物,研究颗粒活性炭(GAC)活化过硫酸钠(PS)降解水中AO7的效能和机理。通过研究GAC含量、PS浓度及p H对AO7降解的影响,发现当GAC为0.4 g/L、PS/AO7摩尔比=15∶1、150 min时,AO7的去除率可达到96.1%。在pH为3~9的条件下,AO7的去除均能达到较好的效果。猝灭实验结果表明,除了·OH、SO_(4)^(-),体系中的单线态氧及表面结合SO_(4)^(-)也参与了AO7的降解。XPS分析结果表明,C-O及π^(*)键可能作为活性位点参与PS活化产生活性物种对AO7进行降解。
The degradation efficiency and mechanism of Acid Orange 7(AO7)in water by granular activated carbon activated sodium persulfate were studied.Reaction conditions such as GAC content,PS concentration and pH value on the degradation were investigated.The results showed that when GAC was 0.4 g/L,molar ratio of persulfate to AO7 of 15∶1,and reaction time of 150 min,the removal rate of AO7 reached 96.1%.Under the condition of pH 3~9,the removal of AO7 can achieve good results.Quenching results show that in addition to·OH and SO4•-,non-free radical pathways such as singlet oxygen and surface-bound SO4•-also involved in the degradation of AO7.The results of XPS showed that C-O and π^(*) may act as active sites involved in AO7 degradation in the system.
作者
谢鹏飞
马梦杰
章慧娟
王诗生
XIE Pengfei;MA Mengjie;ZHANG Huijuan;WANG Shisheng(School of Energy and Environment,Anhui University of Technology,Ma’anshan 243002,China;Engineering Research Center of Biofilm Water Purification and Utilization Technology of Ministry of Education,Anhui University of Technology,Ma’anshan 243032,China)
出处
《环境科学与技术》
CAS
CSCD
北大核心
2024年第S01期8-14,共7页
Environmental Science & Technology
基金
安徽高校自然科学研究项目(KJ2021A0383)
生物膜法水质净化及利用技术教育部工程研究中心开放基金(BWPU2020KF06)。
关键词
颗粒活性炭
过硫酸钠
AO7
活性物种
活性位点
granular activated carbon
sodium persulfate
Acid Orange 7
reactive species
reactive sites
