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铁锰矿类Fenton异相光催化降解有毒有机染料

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张钰, 何燕, 邹彩琼, 邓安平, 赵小蓉, 黄应平. 铁锰矿类Fenton异相光催化降解有毒有机染料[J]. 环境化学, 2010, 29(6): 1032-1037.
引用本文: 张钰, 何燕, 邹彩琼, 邓安平, 赵小蓉, 黄应平. 铁锰矿类Fenton异相光催化降解有毒有机染料[J]. 环境化学, 2010, 29(6): 1032-1037.
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ZHANG Yu, HE Yan, ZOU Caiqiong, DENG Anping, ZHAO Xiaorong, HUANG Yingping. PHOTO-DEGRADATION OF ORGANIC DYE BY IRON-MANGANESE ORE AS HETEROGENEOUS FENTON-LIKE CATALYST[J]. Environmental Chemistry, 2010, 29(6): 1032-1037.
Citation: ZHANG Yu, HE Yan, ZOU Caiqiong, DENG Anping, ZHAO Xiaorong, HUANG Yingping. PHOTO-DEGRADATION OF ORGANIC DYE BY IRON-MANGANESE ORE AS HETEROGENEOUS FENTON-LIKE CATALYST[J]. Environmental Chemistry, 2010, 29(6): 1032-1037.
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铁锰矿类Fenton异相光催化降解有毒有机染料

  • 1.

    三峡库区生态环境教育部工程研究中心, 三峡大学, 宜昌, 443002

  • 基金项目:

    国家自然科学基金(20877048)

    国家重点基础研究发展计划(973)项目前期预研课题(2008CB417206)

    湖北省高校优秀中青年创新团队计划(T200703)

    湖北省自然科学基金创新群体项目(2009CDA020)资助

PHOTO-DEGRADATION OF ORGANIC DYE BY IRON-MANGANESE ORE AS HETEROGENEOUS FENTON-LIKE CATALYST

  • 1.

    Engineering Research Center of Eco-environment in Three Gorges Reservoir Region, Ministry of Education, China Three Gorges University, Yichang, 443002

  • Fund Project:

  • 摘要: 选取6种天然铁锰矿石为光催化剂,以可见光(λ＞420nm)照射下活化H2O2降解有机染料罗丹明B(Rhodamine B,RhB)为探针反应,筛选出活性较高的天然矿石(磁赤铁矿)催化降解RhB及2,4-二氯苯酚(2,4-Dichlorophenol,DCP).实验表明,可见光下磁赤铁矿在pH=7.0的介质体系,H2O2浓度为3×10-3mol·l-1条件下可有效降解RhB.通过反射紫外光谱、原子吸收分光光度法、XRD初步表征了磁赤铁矿组成结构;采用紫外-可见吸收光谱(UV-vis)、红外光谱(IR)、总有机碳(TOC)测定等方法,研究了其可见光照射下对RhB光催化降解特性.结果表明,在实验条件下RhB矿化率达60%,DCP矿化率达到63.93%.利用电子自旋捕捉技术(ESR)跟踪测定RhB降解过程中氧化物种,表明催化降解过程涉及羟基自由基(·OH)氧化过程.拟定异相矿石类Fenton体系与传统均相Fenton体系相比,具有反应介质pH范围宽(3.0—7.0)、可见光激发及催化剂易得廉价等优势.
    Abstract: Six kinds of natural mineral were selected to degrade on organic dye Rhodamine B (RhB) under the visible light. Natural ore (maghemite) with high activity to degrade RhB and small molecular compound 2,4-dichiorophenol (DCP)was selected by comparing the catalytic activity of all the minerals. The results showed that the maghemite had the highest catalytic activity at pH7.0, H2O2 concentration3×10-3mol·l-1 and catalyst dosage 30mg under visible light irradiation. Maghemite's composition and structure were characterized by UV-vis reflection absorption spectrometry, atomic absorption spectrometry and XRD. The degradation process of RhB was studied by UV-visible spectrometry(UV-vis), IR and total organic carbon(TOC). The results indicated that RhB and DCP were degraded effectively with a mineralization ratio of 60.00% for RhB and 63.93% for DCP. Electron spin resonance (ESR) spin-trapping technique determination showed the process of this reaction followed the mechanism of hydroxyl radical oxidation. Compared with traditional Fenton system, heterogeneous Fenton-like system has a wider applicable pHrange(3.0—7.0), can make full use of visible light, and is easy to get.
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  • [1] Roberto Andreozzi, Vincenzo Caprio, Amedeo Insola,et al. Advanced oxidation processes (AOP) for water purification and recovery[J]. Catalysis Today, 1999, 53:51-59
    [2] DENG Jingheng, JIANG Jingyuan, ZHANG Yuanyuan, et al. FeVO4 as a highly active heterogeneous Fenton-like catalyst towards the degradation of Orange Ⅱ[J]. Applied Catalysis B, Environmental, 2008, 84(3/4):468-473
    [3] 鲁安怀. 环境矿物材料基本性能: 无机界矿物天然自净化功能[J]. 岩石矿物学杂志, 2001, 20(4):371-381
    [4] 鲁安怀. 矿物环境属性与无机界天然自净化功能[J]. 矿物岩石地球化学通报, 2002, 21(3):192-197
    [5] 赵超, 黄应平, 方艳芬, 等. 分子筛负载Fe3+可见光协助降解有机污染物[J]. 环境化学, 2008, 27(1):6-10
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    [9] 许韵华, 杨玉国, 曹克宁, 等. 铁氧化物催化氧化降解苯酚[J]. 武汉大学学报: 理学版, 2006, 52(4):431-434
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  • 收稿日期:  2009-12-22

铁锰矿类Fenton异相光催化降解有毒有机染料

  • 1. 三峡库区生态环境教育部工程研究中心, 三峡大学, 宜昌, 443002
  • 收稿日期:  2009-12-22
基金项目:

国家自然科学基金(20877048)

国家重点基础研究发展计划(973)项目前期预研课题(2008CB417206)

湖北省高校优秀中青年创新团队计划(T200703)

湖北省自然科学基金创新群体项目(2009CDA020)资助

摘要: 选取6种天然铁锰矿石为光催化剂,以可见光(λ＞420nm)照射下活化H2O2降解有机染料罗丹明B(Rhodamine B,RhB)为探针反应,筛选出活性较高的天然矿石(磁赤铁矿)催化降解RhB及2,4-二氯苯酚(2,4-Dichlorophenol,DCP).实验表明,可见光下磁赤铁矿在pH=7.0的介质体系,H2O2浓度为3×10-3mol·l-1条件下可有效降解RhB.通过反射紫外光谱、原子吸收分光光度法、XRD初步表征了磁赤铁矿组成结构;采用紫外-可见吸收光谱(UV-vis)、红外光谱(IR)、总有机碳(TOC)测定等方法,研究了其可见光照射下对RhB光催化降解特性.结果表明,在实验条件下RhB矿化率达60%,DCP矿化率达到63.93%.利用电子自旋捕捉技术(ESR)跟踪测定RhB降解过程中氧化物种,表明催化降解过程涉及羟基自由基(·OH)氧化过程.拟定异相矿石类Fenton体系与传统均相Fenton体系相比,具有反应介质pH范围宽(3.0—7.0)、可见光激发及催化剂易得廉价等优势.

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