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纳米Fe0/Fe3O4复合体系对溶液中PCB77的降解研究

Keywords: 纳米Fe0,纳米Fe3O4,PCB77,降解动力学

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Abstract:

研究了纳米Fe0与纳米Fe3O4单一与复合体系对溶液中PCB77的降解动力学,以及影响降解效率的不同因素。结果表明,投加纳米Fe0对PCB77有显著的降解效果,反应240min后PCB77残留率为8.94%;投加纳米Fe0同时配以不同比例的纳米Fe3O4能明显影响PCB77的降解速率,纳米Fe0/Fe3O4投加比例为1∶0.1、1∶0.2和1∶1时,PCB77的残留率分别为6.46%、10.23%和38.20%。溶液pH对纳米Fe0/Fe3O4复合体系降解PCB77具有较大的影响,当溶液pH为6.8时,纳米Fe0/Fe3O4复合体系降解PCB77的效果最好。纳米Fe0/Fe3O4复合体系对PCB77的降解是一个还原脱氯的过程,随着PCB77残留率的减小,氯离子浓度不断增大,同时反应体系中氧化还原电位不断降低。研究结果将为环境中残留PCBs提供一种高效去除方法,并为PCBs污染水体和土壤的修复提供理论依据。

References

[1]  刘耕耘;陈左生;史烨弘.北京土壤中的PCBs含量与组成[J].环境科学学报,2006(12)
[2]  金重阳;杨国兴;彭万寿,多氯联苯(PCBs)的污染及无害化处理,环境保护科学,1990(3).
[3]  Rong Cheng ;Jian-long Wang ;Wei-xian Zhang,Comparison of reductive dechlorination of p-chlorophenol using Fe~0 and nanosized Fe~0,Journal of Hazardous Materials?,2007, 144(1/2).
[4]  吴文海;徐杰.多氯联苯降解方法研究进展[J].宁夏大学学报(自然科学版),2001(2)
[5]  何娜;李培军;范淑秀.零价金属降解多氯联苯(PCBs)[J].生态学杂志,2007(5)
[6]  GILLHAM R W;O\'HANNESIN S F,Enhanced degradation of halogenated aliphatics by zero-volent,Ground Water? ,1994, 32.
[7]  谢海赟;程金平;胡晓芳.上海市某工业区表层土壤中PCBs分布特征研究[J].南开大学学报(自然科学版),2005(4)
[8]  Fr(o)schl B;Stangl G;Niessner R,Combination of micellar extraction and GC-ECD for the determination of polychlorinated biphenyls (PCBs) in water,Fresenius J Anl Chem,1997.
[9]  Srogi K,Levels and congener distributions of PCDD,PCDFs and dioxin-like PCBs in environmental and human samples:a review,ENVIRONMENTAL CHEMISTRY LETTERS? ,2008, 6.
[10]  全燮;刘慧娟;杨凤林.二元金属体系对水中多氯有机物的催化还原脱氯特性[J].中国环境科学,1998(4)
[11]  陈颖敏;李静;张学谦.镍/铁双金属体系对多氯联苯的催化脱氯降解[J].华北电力大学学报,2008(4)
[12]  周红艺;徐新华;汪大翚.钯/铁双金属对水中氯苯的催化脱氯研究[J].浙江大学学报(工学版),2003(3)
[13]  Sweeny K H,Reductive degradation treatment of industrial and municipal wastewaters,Washington D.C.:Theme,Water Reuse from Research to Application,American Water Works Association Research Foundation,1979.
[14]  常春;祝凌燕;朱淑贞.纳米零价铁对γ-HCH的降解效果及机理研究[J].中国环境科学,2010(2)
[15]  Tee Y H;Grulke E;Bhattacharyya D,Role of Ni/Fe nanoparticle composition on the degradation of trichoroethylene from water,Industrial and Engineering Chemistry Research? ,2005, 44.
[16]  Lien HL. ;Zhang WX.,Nanoscale iron particles for complete reduction of chlorinated ethenes,Colloids and Surfaces. A, Physicochemical and Engineering Aspects?,2001, 191(1/2).
[17]  Coelho F D S;Ardisson J D;Moura F C C,Potential application of highly reactive Fe0/Fe3O4 composites for the reduction of Cr(Ⅵ) environmental contaminants,Chemosphere,2008.
[18]  司雄元;司友斌;王寅.纳米Fe、Si体系对3,3\',4,4\'-四氯联苯的脱氯降解[J].中国环境科学,2011(5)
[19]  Weber E J,Iron-mediated reductive transformation:Investigation of reaction mechanism,Environmental Science and Technology,1996.
[20]  胡恩宇;杨丽莉;王美飞.气相色谱法同时测定水中28种多氯联苯单体[J].环境监测管理与技术,2010(1)
[21]  储少岗;徐晓白;童逸平,多氯联苯在典型污染地区环境中的分布及其环境行为,环境科学学报,1995(4).
[22]  Tsigouri A D;Tyrpenou A E,Determination of organochlorine compounds(OCPs and PCBs) in fish oil and fish liver oil by capillary gas chromatography and electron capture detection,Bulletin of Environmental Contamination and Toxicology? ,2000, 65.
[23]  Moura F C C;Araujo M H;Costa R C C,E□cient use of Fe metal as an electron transfer agent in a heterogenenus Fenton system based on Fe0/Fe3O4 composites,Chemosphere? ,2005, 60.
[24]  Chang Ming-Chin;Shu Hung-Yee;Hsieh Wen-Pin,Using nanoscale zero-valent iron for the remediation of polycyclic aromatic hydrocarbons contaminated,J Air and Waste Manage A ssoc,2005.
[25]  刘菲;汤鸣皋;何小娟.零价铁降解水中氯代烃的实验室研究[J].地球科学-中国地质大学学报,2002(2)
[26]  Abdul A S;Gibson T L;Ang C C,Pilot test of in situ surfactant washing of polychlorinated biphenyls and oils from a contaminated site,Ground Water? ,1992, 30(02).

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