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水相中苯酚光催化降解的全额光子效率

方雪慧 黄蓉 路娟娟 毕承路 叶招莲

方雪慧, 黄蓉, 路娟娟, 毕承路, 叶招莲. 水相中苯酚光催化降解的全额光子效率[J]. 环境科学研究, 2016, 29(1): 99-106.
引用本文: 方雪慧, 黄蓉, 路娟娟, 毕承路, 叶招莲. 水相中苯酚光催化降解的全额光子效率[J]. 环境科学研究, 2016, 29(1): 99-106.
FANG Xuehui, HUANG Rong, LU Juanjuan, BI Chenglu, YE Zhaolian. Analysis of Global Photonic Efficiency of Photolytic Degradation of Phenol in Aqueous Solution[J]. Research of Environmental Sciences, 2016, 29(1): 99-106.
Citation: FANG Xuehui, HUANG Rong, LU Juanjuan, BI Chenglu, YE Zhaolian. Analysis of Global Photonic Efficiency of Photolytic Degradation of Phenol in Aqueous Solution[J]. Research of Environmental Sciences, 2016, 29(1): 99-106.

水相中苯酚光催化降解的全额光子效率

基金项目: 国家自然科学基金项目(51108211);常州市科技计划项目(CJ20130033);江苏省大气环境监测与污染控制高技术研究重点实验室开放基金项目(KHK1409)

Analysis of Global Photonic Efficiency of Photolytic Degradation of Phenol in Aqueous Solution

  • 摘要: 为定量评价光催化反应器的性能,利用主辐射波长为207 nm的KrBr*准分子灯降解水相中的苯酚,测定了光解和光催化降解2种体系中苯酚和TOC去除率,并计算了苯酚降解的ξg(全额光子效率),探讨了其影响因素. 结果表明:①延长反应时间、加入适量催化剂、降低初始c(苯酚)能提高苯酚和TOC去除率. 采用动力学模型对苯酚的降解进行拟合,表明光解和光催化降解体系中苯酚的降解均符合准一级动力学模型. ②加入催化剂和提高初始c(苯酚)均可以获得较高的ξg,而光源的辐射功率与ξg没有线性相关性;在辐射功率为0.76 W、初始c(苯酚)为1.10 mmol/L、催化剂投加量(以ρ计)为0.8 g/L的条件下,ξg为5.56%. ③采用高效液相色谱对光催化降解体系中生成的中间产物的变化规律进行研究发现,4种中间产物表现为c(对苯二酚)>c(邻苯二酚)>c(对苯醌)>c(间苯二酚);通过建立苯酚及中间产物的拟一级降解动力学模型,证实苯酚光催化降解历程为苯酚→芳香烃中间产物→最终产物.

     

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出版历程
  • 收稿日期:  2015-05-15
  • 修回日期:  2015-10-15
  • 刊出日期:  2016-01-25

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