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兰青, 叶志钧, 陈熠熠, 张艳林. 异相草酸铁光降解五氯酚过程中的铁物种分配[J]. 环境化学, 2017, 36(2): 336-344. doi: 10.7524/j.issn.0254-6108.2017.02.2016040506
引用本文: 兰青, 叶志钧, 陈熠熠, 张艳林. 异相草酸铁光降解五氯酚过程中的铁物种分配[J]. 环境化学, 2017, 36(2): 336-344. doi: 10.7524/j.issn.0254-6108.2017.02.2016040506
shu
LAN Qing, YE Zhijun, CHEN Yiyi, ZHANG Yanlin. Distribution of Fe species during the photodegradation of pentachlorophenol in heterogeneous Fe-oxalate system[J]. Environmental Chemistry, 2017, 36(2): 336-344. doi: 10.7524/j.issn.0254-6108.2017.02.2016040506
Citation: LAN Qing, YE Zhijun, CHEN Yiyi, ZHANG Yanlin. Distribution of Fe species during the photodegradation of pentachlorophenol in heterogeneous Fe-oxalate system[J]. Environmental Chemistry, 2017, 36(2): 336-344. doi: 10.7524/j.issn.0254-6108.2017.02.2016040506
shu

异相草酸铁光降解五氯酚过程中的铁物种分配

  • 1.

    广东环境保护工程职业学院环境监测系, 佛山, 528216;

  • 2.

    广东环境保护工程职业学院, 广东省固体废弃物资源化与重金属污染控制工程技术研究中心, 佛山, 528216;

  • 3.

    中山大学化学与化学工程学院, 广州, 510275

  • 基金项目:

    国家自然科学基金（41201503），高等学校博士学科点专项科研基金（20110171120025），广东环境保护工程职业学院院长基金（KY201301003），广东省高等职业教育品牌专业建设项目（2016gzpp036），广东省环保专项资金，广东省高等学校优秀青年教师培养计划（YQ2015203）资助.

Distribution of Fe species during the photodegradation of pentachlorophenol in heterogeneous Fe-oxalate system

  • 1.

    Environment Monitoring Department, Guangdong Polytechnic of Environmental Protection Engineering, Foshan, 528216, China;

  • 2.

    Guangdong Engineering and Technology Research Center of Solid Waste Resource Recovery and Heavy Metal Pollution Control, Guangdong Polytechnic of Environmental Protection Engineering, Foshan, 528216, China;

  • 3.

    School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou, 510275, China

  • Fund Project: Supported by the National Natural Science Foundation of China (41201503), Research Fund for the Doctoral Program of Higher Education(20110171120025), Foundation of President of Guangdong Polytechnic of Environmental Protection Engineering (KY201301003), Guangdong Province Higher Vocational Education Brand Specialty Construction Project (2016gzpp036), Guangdong Province Special Fund For Environmental Protection and the Outstanding Young Teacher Training Program for Higher Education of Guangdong Province (YQ2015203).

  • 摘要: 草酸铁光化学体系在自然界中广泛存在，此体系可以内源生成过氧化氢，构成Fenton体系，产生羟基自由基（·OH），用于降解有机污染物.通过测定赤铁矿（α-Fe2O3）和针铁矿（α-FeOOH）两种铁氧化物-草酸体系在光降解五氯酚（PCP）过程中草酸和pH的变化，计算反应过程中各种Fe（Ⅲ）和Fe（Ⅱ）物种的分配情况，分析影响体系活性的关键因素.研究表明，体系中的铁物种分配和pH通过影响体系的铁循环直接影响体系的反应活性.相同初始pH，不同草酸初始浓度下，高活性的Fe（Ⅱ）物种分配具有较大差异从而影响体系的铁循环速率和反应活性.不同初始pH，达到饱和吸附的相同草酸初始浓度下，高活性的Fe（Ⅱ）和Fe（Ⅲ）物种均为体系控制物种，而pH通过影响Fe（Ⅲ）的还原速率从而影响体系的铁循环速率和反应活性.
    Abstract: The photochemistry system of Fe-oxalic acid is ubiquitous in nature, in which H2O2, Fenton reaction and·OH can be formed in situ. In this paper, during the photodegradation of pentachlorophenol (PCP) in hematite (α-Fe2O3) and goethite (α-FeOOH) system with oxalic acid, the variation of oxalic acid and pH were determined,the distribution of various Fe species were calculated and the critical factors of system were explored. The results showed that the distribution of Fe species and pH greatly influenced the activity of system by regulating the iron redox cycling. At the same initial pH and different initial concentrations of oxalic acid, the proportion of high activity Fe(Ⅱ) was different which greatly influenced the efficiency of the iron cycling and the activity of system. At different initial pH and same initial concentration of oxalic acid approaching the maximum amount of adsorption, the dominant species of Fe(Ⅱ) and Fe(Ⅲ) were all high activity, pH influenced the efficiency of the iron cycling and the activity of system by influencing the reduction rate of Fe(Ⅲ).
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  • [1] SHEN H, YAN X L, ZHAO M, et al. Exudation of organic acids in common bean as related to mobilization of aluminum- and iron-bound phosphates[J]. Environmental and Experimental Botany, 2002, 48(1):1-9.
    [2] ZUO Y, HOIGNE J. Formation of hydrogen peroxide and depletion of oxalic acid in atmospheric water by photolysis of iron(Ⅲ)-oxalato complexes[J]. Environmental Science & Technology, 1992, 26(5):1014-1022.
    [3] JEONG J, YOON J. Dual roles of CO2-· for degrading synthetic organic chemicals in the photo/ferrioxalate system[J]. Water Research, 2004, 38(16):3531-3540.
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    [5] JEONG J S, YOON J Y. pH effect on OH radical production in photo/ferrioxalate system[J]. Water Res, 2005, 39(13):2893-2900.
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  • 收稿日期:  2016-04-05
  • 刊出日期:  2017-02-15
兰青, 叶志钧, 陈熠熠, 张艳林. 异相草酸铁光降解五氯酚过程中的铁物种分配[J]. 环境化学, 2017, 36(2): 336-344. doi: 10.7524/j.issn.0254-6108.2017.02.2016040506
引用本文: 兰青, 叶志钧, 陈熠熠, 张艳林. 异相草酸铁光降解五氯酚过程中的铁物种分配[J]. 环境化学, 2017, 36(2): 336-344. doi: 10.7524/j.issn.0254-6108.2017.02.2016040506
shu
LAN Qing, YE Zhijun, CHEN Yiyi, ZHANG Yanlin. Distribution of Fe species during the photodegradation of pentachlorophenol in heterogeneous Fe-oxalate system[J]. Environmental Chemistry, 2017, 36(2): 336-344. doi: 10.7524/j.issn.0254-6108.2017.02.2016040506
Citation: LAN Qing, YE Zhijun, CHEN Yiyi, ZHANG Yanlin. Distribution of Fe species during the photodegradation of pentachlorophenol in heterogeneous Fe-oxalate system[J]. Environmental Chemistry, 2017, 36(2): 336-344. doi: 10.7524/j.issn.0254-6108.2017.02.2016040506
shu

异相草酸铁光降解五氯酚过程中的铁物种分配

  • 1.  广东环境保护工程职业学院环境监测系, 佛山, 528216;
  • 2.  广东环境保护工程职业学院, 广东省固体废弃物资源化与重金属污染控制工程技术研究中心, 佛山, 528216;
  • 3.  中山大学化学与化学工程学院, 广州, 510275
  • 收稿日期:  2016-04-05
基金项目:

国家自然科学基金（41201503），高等学校博士学科点专项科研基金（20110171120025），广东环境保护工程职业学院院长基金（KY201301003），广东省高等职业教育品牌专业建设项目（2016gzpp036），广东省环保专项资金，广东省高等学校优秀青年教师培养计划（YQ2015203）资助.

摘要: 草酸铁光化学体系在自然界中广泛存在，此体系可以内源生成过氧化氢，构成Fenton体系，产生羟基自由基（·OH），用于降解有机污染物.通过测定赤铁矿（α-Fe2O3）和针铁矿（α-FeOOH）两种铁氧化物-草酸体系在光降解五氯酚（PCP）过程中草酸和pH的变化，计算反应过程中各种Fe（Ⅲ）和Fe（Ⅱ）物种的分配情况，分析影响体系活性的关键因素.研究表明，体系中的铁物种分配和pH通过影响体系的铁循环直接影响体系的反应活性.相同初始pH，不同草酸初始浓度下，高活性的Fe（Ⅱ）物种分配具有较大差异从而影响体系的铁循环速率和反应活性.不同初始pH，达到饱和吸附的相同草酸初始浓度下，高活性的Fe（Ⅱ）和Fe（Ⅲ）物种均为体系控制物种，而pH通过影响Fe（Ⅲ）的还原速率从而影响体系的铁循环速率和反应活性.

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