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太阳光照射土壤中多环芳烃化合物(PAHs)光催化降解动力学

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张利红, 陈忠林, 徐成斌, 李雪梅, 李培军. 太阳光照射土壤中多环芳烃化合物(PAHs)光催化降解动力学[J]. 环境化学, 2010, 29(3): 486-490.
引用本文: 张利红, 陈忠林, 徐成斌, 李雪梅, 李培军. 太阳光照射土壤中多环芳烃化合物(PAHs)光催化降解动力学[J]. 环境化学, 2010, 29(3): 486-490.
shu
ZHANG Li-hong, CHEN Zhong-lin, XU Cheng-bin, LI Xue-mei, LI Pei-jun. KINETICS DYNAMICS OF PHOTOCATALYTIC DEGRADATION OF PAHs ON SOIL SURFACE UNDER SOLAR IRRADIATION[J]. Environmental Chemistry, 2010, 29(3): 486-490.
Citation: ZHANG Li-hong, CHEN Zhong-lin, XU Cheng-bin, LI Xue-mei, LI Pei-jun. KINETICS DYNAMICS OF PHOTOCATALYTIC DEGRADATION OF PAHs ON SOIL SURFACE UNDER SOLAR IRRADIATION[J]. Environmental Chemistry, 2010, 29(3): 486-490.
shu

太阳光照射土壤中多环芳烃化合物(PAHs)光催化降解动力学

  • 1.

    辽宁大学环境学院, 沈阳, 110036;

  • 2.

    中国科学院沈阳应用生态研究所, 沈阳, 110016;

  • 3.

    沈阳师范大学化学与生命科学学院, 沈阳, 110034

  • 基金项目:

    国家重点基础研究发展计划(2004CB418506)

KINETICS DYNAMICS OF PHOTOCATALYTIC DEGRADATION OF PAHs ON SOIL SURFACE UNDER SOLAR IRRADIATION

  • 1.

    School of Environmental Science, Liaoning University, Shenyang, 110036, China;

  • 2.

    Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China;

  • 3.

    College of Chemistry and Life Science, Shenyang Normal University, Shenyang, 110034, China

  • Fund Project:

  • 摘要: 以多环芳烃菲(Phe)、芘(Pyr)和苯并[a]芘(BaP)为目标污染物,研究了土壤pH和腐殖酸对太阳光降解PAHs动力学的影响,以及土壤pH对纳米TiO2和半导体Fe2O3催化太阳光降解PAHs动力学的影响.结果表明,太阳光照射下酸性和碱性土壤中PAHs的降解快于中性,在pH相同的条件下,三种PAHs的降解快慢的顺序为BaPPyrPhe.在PAHs污染土壤中加入腐殖酸后光降解速率加快,5mg·kg-1腐殖酸可有效地促进土壤中PAHs的降解,腐殖酸起到敏化作用.在酸性条件下纳米TiO2和半导体Fe2O3催化降解最快,在碱性和中性条件下相差不大.
    Abstract: This paper studied the soil borne PAHs(polycyclic aromatic hydrocarbons)photodegradation and photocatalytic degradation under solar irradiation with phenanthrene,pyrene and benzo[a]pyrene as target contaminants.The effect of soil pH and humic acids(HA)on the kinetics of photodegradation was studied.The effect of soil pH on the photocatalytic degradation of PAHs was investigated with nano TiO2 or Fe2O3 semi-conducter as catalysts.The results showed that the photodegradation rate of PAHs in acidic or alkaline conditions was greater than that in neutral condition under solar light irradiation.The photodegradation rate of diferent PAHs follows the order of:BaPPyrPhe at the same soil pH.HA accelerated PAHs photodegradation.HA played a sensitizing role during the PAHs photodegradation.HA concentration of 5 mg·kg-1 could efficiently sensitized the PAHs photodegradation.In acidic conditions,the photocatalytic degradation rate of PAHs using nano TiO2 or Fe2O3 semi conducter as catalysts were the greatest,while in neutral and alkaline conditions the difference was not obvious.
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  • [1] Cerniglia C E,Biodegradation of Polycyclic Aromatic Hydrocarbons [J]. Biodegradation,1992,3:351—368
    [2] Matsuzawa S, Nasser-ali L, Garrigues P,Photolytic Behavior of Polycyclic Aromatic Hydrocarbons in Diesel Particulate Matter Deposited on the Ground [J]. Environ.Sci.Technol., 2001,35:3139—3143
    [3] Niu J F, Chen J W, Dieter M et al.,Photolysis of Polycyclic Aromatic Hydrocarbons Adsorbed on Spruce[Picea abies(L.) Karst.] Needles under Sunlight Irradiation[J]. Environ.Pollut., 2003,123(1):39—45
    [4] Zhang L H, Li P J,Li X M et al.,Photocatalytic Degradation of Polycyclic Aromatic Hydrocarbons on Soil Surfaces Using TiO2under UV-light [J].J.Hazard.Mater.,2008,158:478—484
    [5] Zhang L H, Li P J, Gong Z Q, Photochemical Behavior of Benzo[a]pyrene on Soil Surfaces under UV Light Irradiation [J].J.Environ.Sci.,2006,18(6):1226—1232
    [6] Fan X Z, Lu B, Gong A J,Dynamics of Solar Light Photodegradation Behavior of Atrazine on Soil Surface [J]. J.Hazard. Mater., 2005,117:75—79
    [7] Lehto K M, Vuorima E, Lemmetyinen H, Photolysis of Polycyclic Aromatic Hydrocarbons(PAHs) in Dilute Aqueous Solutions Detected by Fluorescence[J]. J. Photochem. Photobio. A: Chem., 2000,136:53—60
    [8] Higarashi M M, Jardim W F, Remediation of Pesticide Contaminated Soil Using TiO2 Mediated by Solar Light[J]. Catal. Today, 2002,76:201—207
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  • 收稿日期:  2009-04-03
张利红, 陈忠林, 徐成斌, 李雪梅, 李培军. 太阳光照射土壤中多环芳烃化合物(PAHs)光催化降解动力学[J]. 环境化学, 2010, 29(3): 486-490.
引用本文: 张利红, 陈忠林, 徐成斌, 李雪梅, 李培军. 太阳光照射土壤中多环芳烃化合物(PAHs)光催化降解动力学[J]. 环境化学, 2010, 29(3): 486-490.
shu
ZHANG Li-hong, CHEN Zhong-lin, XU Cheng-bin, LI Xue-mei, LI Pei-jun. KINETICS DYNAMICS OF PHOTOCATALYTIC DEGRADATION OF PAHs ON SOIL SURFACE UNDER SOLAR IRRADIATION[J]. Environmental Chemistry, 2010, 29(3): 486-490.
Citation: ZHANG Li-hong, CHEN Zhong-lin, XU Cheng-bin, LI Xue-mei, LI Pei-jun. KINETICS DYNAMICS OF PHOTOCATALYTIC DEGRADATION OF PAHs ON SOIL SURFACE UNDER SOLAR IRRADIATION[J]. Environmental Chemistry, 2010, 29(3): 486-490.
shu

太阳光照射土壤中多环芳烃化合物(PAHs)光催化降解动力学

  • 1.  辽宁大学环境学院, 沈阳, 110036;
  • 2.  中国科学院沈阳应用生态研究所, 沈阳, 110016;
  • 3.  沈阳师范大学化学与生命科学学院, 沈阳, 110034
  • 收稿日期:  2009-04-03
基金项目:

国家重点基础研究发展计划(2004CB418506)

摘要: 以多环芳烃菲(Phe)、芘(Pyr)和苯并[a]芘(BaP)为目标污染物,研究了土壤pH和腐殖酸对太阳光降解PAHs动力学的影响,以及土壤pH对纳米TiO2和半导体Fe2O3催化太阳光降解PAHs动力学的影响.结果表明,太阳光照射下酸性和碱性土壤中PAHs的降解快于中性,在pH相同的条件下,三种PAHs的降解快慢的顺序为BaPPyrPhe.在PAHs污染土壤中加入腐殖酸后光降解速率加快,5mg·kg-1腐殖酸可有效地促进土壤中PAHs的降解,腐殖酸起到敏化作用.在酸性条件下纳米TiO2和半导体Fe2O3催化降解最快,在碱性和中性条件下相差不大.

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