颗粒活性炭活化过硫酸钠降解水中酸性橙7
Degradation of Acid Orange 7 in Water by Granular Activated Carbon Activated Sodium Persulfate
谢鹏飞 1马梦杰 1章慧娟 2王诗生2
作者信息
- 1. 安徽工业大学能源与环境学院,安徽 马鞍山 243002
- 2. 安徽工业大学能源与环境学院,安徽 马鞍山 243002;安徽工业大学生物膜法水质净化及利用技术教育部工程研究中心,安徽 马鞍山 243002
- 折叠
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pH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、SO4·-,体系中的单线态氧及表面结合SO4·-9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.
Abstract
The degradation efficiency and mechanism of Acid Orange 7(AO7)in water by granular activated carbon activat-ed sodium persulfate were studied.Reaction conditions such as GAC content,PS concentration and pH value on the degrada-tion 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 OHand 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 ac-tive sites involved in AO7 degradation in the system.
关键词
颗粒活性炭/过硫酸钠/AO7/活性物种/活性位点Key words
granular activated carbon/sodium persulfate/Acid Orange 7/reactive species/reactive sites引用本文复制引用
基金项目
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)
出版年
2024
NETL
NSTL
万方数据