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微生物PRB中2,4-二硝基甲苯的还原降解机理研究
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摘要
以零价铁(Fe~0)作为PRB墙体介质材料,通过添加微生物Shewanella oneidensis MR-1与Fe~0形成联合体系,模拟不同地下水环境下的pH值和温度状况,分别研究了单独微生物MR-1体系、单独Fe~0体系和Fe~0-MR-1联合体系在不同pH值和不同温度条件下对地下水环境中2,4-二硝基甲苯(2,4-DNT)的还原降解情况。实验结果表明,单独微生物MR-1体系和Fe~0-MR-1联合体系对2,4-DNT的还原降解率与pH值和温度都很强的相关性,然而温度对单独Fe~0体系的还原降解率没有影响。在pH值6~8的范围内,联合体系对2,4-DNT的还原降解效果优于单独微生物MR-1体系、单独Fe~0体系,并且在pH值一定时,Fe~0-MR-1联合体系对2,4-DNT的还原降解效果随着温度的升高而提高。
We chose zero-valent iron(Fe~0) as lm-prb dielectric materials of PRB and built joint system by adding microorganism Shewanella oneidensis MR-1 to Fe~0. Different conditions of p H values and temperature of groundwater environment were simulated. The reductive degradation of 2,4-DNT by only microbial system, only zero-valent iron system and joint system of microbial and Zero-valent iron was investigated, respectively. Experimental results showed that the reductive degradation of 2,4-DNT in only microbial system and joint system of microbial and Zero-valent iron was influenced by both p H values and temperature. However, the reductive degradation of only zero-valent iron system was independent on temperature. In the range of p H 6 ~ 8, the reductive degradation of 2,4-DNT of joint system was superior to only microbial system, only zero-valent iron system. In addition, in the constant p H values, the reductive degradation of 2,4-DNT of joint system was enhanced along with the increase of the temperature.
引文
[1]蔡勇.吸附-降解修复石油烃污染地下水的方法研究[D].陕西科技大学,2006.
    [2]杨梅,费宇红.地下水污染修复技术的研究综述[J].勘察科学技术,2008(4):12-16.
    [3]Keith L,Telliard W.ES&T Special Report:Priority pollutants:I-a perspective view[J].Environmental Science&Technology,2003,13(4):416-423.
    [4]Ping G,Kuperman R G,Sunahara G I.Genotoxicity of 2,4-and 2,6-dinitrotoluene as measured by the Tradescantia micronucleus(Trad-MCN)bioassay[J].Mutation Research/genetic Toxicology&Environmental Mutagenesis,2003,538(1-2):13–18.
    [5]Cheng J,Suidan M T,Venosa A D.Anaerobic biotransformation of 2,4-dinitrotoluene with ethanol,methanol,acetic acid and hydrogen as primary substrates[J].Water Research,1998,32(10):2921-2930.
    [6]And U L,Spain J C,Smets B F.Simultaneous Biodegradation of 2,4-Dinitrotoluene and 2,6-Dinitrotoluene in an Aerobic Fluidized-Bed Biofilm Reactor[J].Environmental Science Technology,1998,32(1):82-87.
    [7]Rickert D E,Butterworth B E,Popp J A,et al.Dinitrotoluene:Acute Toxicity,Oncogenicity,Genotoxicity,and Metabolism[J].Critical Reviews in Toxicology,1984,13(3):217-34.
    [8]Taylor C A,Stefan H G.Shallow groundwater temperature response to climate change and urbanization.[J].Journal of Hydrology,2009,375(3):601-612.
    [9]Hillel D..Introduction to Soil Physics[J].Introduction to Soil Physics,1982:321–357.
    [10]Ludzack F.L.,Kinkead D..Persistence of oily wastes in polluted water under aerobic conditions[J].Industrial&Engineering Chemistry,2002,48(2):263-267.
    [11]Christensen T.H.,Kjeldsen P.,Albrechtsen H-J.,et al.Attenuation of landfill leachate pollutants in aquifers[J].Critical Reviews in Environmental Science&Technology,1965,205(4972):719-20.
    [12]Christensen J.B.,Jensen D.L.,Gr?n C.,et al.Characterization of the dissolved organic carbon in landfill leachate-polluted groundwater[J].Water Research,1998,32(1):125-135.
    [13]Renou S.,Givaudan J.G.,Poulain S.,et al.Landfill leachate treatment:Review and opportunity[J].Journal of Hazardous Materials,2008,150(3):468-93.
    [14]Salmon S.U.,Malmstr?m M.E..Geochemical processes in mill tailings deposits:modelling of groundwater composition[J].Applied Geochemistry,2004,19(1):1-17.
    [15]刘虹,张兰英,刘娜,等.生物可渗透性反应墙修复石油烃污染地下水的效果及微生物多样性研究[J].环境污染与防治,2013,35(3):1-4.
    [16]Van N T,Lieben F,Dries J,et al.Impact of microbial activities on the mineralogy and performance of column-scale permeable reactive iron barriers operated under two different redox conditions.[J].Environmental Science&Technology,2007,41(16):5724-30.
    [17]涂传青,马鲁铭.零价铁还原降解2,4-二硝基甲苯研究[J].环境科技,2005,18(2):1-3.
    [18]姜永海,张进保,席北斗,等.Fe~0还原地下水中2,4-DNT影响因素及产物[J].环境科学研究,2010,23(12):1541-1545.
    [19]马志飞,廉新颖,张进保,等.零价铁PRB修复2,4-DNT污染地下水模拟研究[J].中国环境科学,2013,33(5):814-820.
    [20]Alvarez P J,Till B A,Weathers L J,et al.Fe(o)-based bioremediation of aquifers contaminated with mixed wastes:US,US 6719902 B1[P].2004.

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