摘要
针对半封闭空间中对二甲苯的去除难题,提出采用二氧化氯降解对二甲苯的方法。分别选取液态和气态对二甲苯作为研究对象,重点探讨了反应物浓度和时间对对二甲苯降解效能的影响。实验结果表明,12.5 mg/L ClO_(2)与水溶液中对二甲苯反应5 h时,对二甲苯降解率最高,为34.36%;140 mg/m^(3)ClO_(2)与空气中对二甲苯反应10 h时,对二甲苯降解率最高,达63.20%。结合自由基淬灭实验及气相色谱-质谱检测结果推测对二甲苯最终矿化为CO_(2)和H_(2)O。研究表明,二氧化氯能有效降解对二甲苯,为典型苯系污染物去除研究提供了新的技术途径。
A method of using chlorine dioxide to degrade p-xylene is proposed to address the difficulty of removing p-xylene in semi-closed space.P-xylene in liquid and gas phases were selected as the research objects,and the impact of reactant concentration and time on the degradation efficiency of p-xylene was mainly discussed.The experimental results showed that the removal effect of liquid p-xylene reached a maximum of 34.36%in 5 h when the dosage of ClO_(2)was 12.5 mg/L,and the removal effect of gaseous p-xylene reached a maximum of 63.20%in 10 h when the ClO_(2)dosage was 140 mg/m^(3).The results of quenching experiment and gas chromatography-mass spectrometry speculated that p-xylene was finally mineralized into CO_(2)and H_(2)O.The study demonstrates that chlorine dioxide can effectively degrade p-xylene in semi-enclosed spaces,which provides a new technical way for the removal of typical benzene pollutants.
作者
乔怡娜
王安隆
晋日亚
熊健
刘娇琴
贺增弟
QIAO Yi-na;WANG An-long;JIN Ri-ya;XIONG Jian;LIU Jiao-qin;HE Zeng-di(School of Environment and Safety Engineering,North University of China,Taiyuan 030051,China;Key Laboratory of Biodiversity and Eco-environmental Protection of the Qinghai-Tibetan Plateau Ministry of Education,Tibet University,Lhasa 850000,China;Tibet Autonomous Region Key Laboratory of Plateau Environmental Engineering and Pollution Control,Tibet University,Lhasa 850000,China;School of Ecology and Environment,Tibet University,Lhasa 850000,China)
出处
《化学试剂》
CAS
北大核心
2023年第9期128-133,共6页
Chemical Reagents
基金
西藏大学中央财政支持地方高校发展专项资金项目(2022年1号)
西藏大学中央财政支持地方高校发展专项资金项目(2023年1号)。
关键词
对二甲苯
二氧化氯
降解
半封闭空间
效能
p-xylene
chlorine dioxide
degradation
semi-closed space
efficiency
