| δ-MnO2氧化降解苯酚的机理研究 |
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| 引用本文： | 徐建,张莹,李蕾,郭昌胜,张远.δ-MnO2氧化降解苯酚的机理研究[J].环境科学学报,2013,33(4):1010-1016. |
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| 作者姓名： | 徐建 张莹 李蕾 郭昌胜 张远 |
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| 作者单位： | 中国环境科学研究院环境基准与风险评估国家重点实验室,流域水生态保护技术研究室,北京100012 |
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| 基金项目： | 中央级公益性科研院所基本科研业务专项课题(No.2010KYYW03);国家自然科学基金(No.20977051) |
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| 摘 要： | δ-MnO2以水羟锰矿和水钠锰矿的形式普遍存在于陆地和海洋环境中,是酚类等有机污染物发生非生物转化的重要氧化剂.本文研究了实验室制备的δ-MnO2悬浮液对苯酚的去除作用,同时讨论了pH、二氧化锰投加量、离子强度、共存金属离子和腐殖酸等不同影响因素对苯酚去除效率的影响.结果表明,苯酚氧化降解的最佳pH和δ-MnO2投加量分别为3.62和0.13 mg·L-1.溶液中共存的Na+和Mn2+会对苯酚氧化降解产生抑制作用,而Mg2+和Ca2+对反应过程没有明显的影响.溶液中共存的腐殖酸也对苯酚的降解过程产生了抑制作用,随着腐殖酸的浓度由1 mg·L-1增加到5 mg·L-1,苯酚的去除率从96.9％降为78.9％.GC-MS分析发现,对苯二酚为该过程的主要中间产物,同时给出了苯酚在δ-MnO2存在时的可能降解机制.
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| 关 键 词： | δ-MnO2 苯酚 氧化降解 机理 |
| 收稿时间： | 7/3/2012 12:00:00 AM |
| 修稿时间： | 2012/7/27 0:00:00 |
Oxidative degradation of phenol by manganese dioxide |
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| XU Jian,ZHANG Ying,LI Lei,GUO Changsheng and ZHANG Yuan.Oxidative degradation of phenol by manganese dioxide[J].Acta Scientiae Circumstantiae,2013,33(4):1010-1016. |
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| Authors: | XU Jian ZHANG Ying LI Lei GUO Changsheng and ZHANG Yuan |
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| Institution: | State Key Laboratory of Environmental Criteria and Risk Assessment, Laboratory of Riverine Ecological Conservation and Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012;State Key Laboratory of Environmental Criteria and Risk Assessment, Laboratory of Riverine Ecological Conservation and Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012;State Key Laboratory of Environmental Criteria and Risk Assessment, Laboratory of Riverine Ecological Conservation and Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012;State Key Laboratory of Environmental Criteria and Risk Assessment, Laboratory of Riverine Ecological Conservation and Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012;State Key Laboratory of Environmental Criteria and Risk Assessment, Laboratory of Riverine Ecological Conservation and Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012 |
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