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有机配体对膨润土负载纳米零价铁还原Cr(Ⅵ)的影响 被引量：8

Influence of Various Organic Ligands on the Removal of Cr(Ⅵ) by Bentonite-Supported Nanoscale Zero-Valent Iron
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摘要 六价铬〔Cr(Ⅵ)〕因具有剧毒性和致癌性而被广泛关注.以Fe(Ⅲ)与NaBH4反应制得负载型的纳米铁(B-NZVI),并对该材料做了TEM和AAS的表征;深入考察B-NZVI去除Cr(Ⅵ)的动力学规律,以及草酸、柠檬酸、草酸钠、柠檬酸钠等有机配体对膨润土负载纳米零价铁还原Cr(Ⅵ)去除速率的影响,并对其影响机理进行初步探讨.结果表明,膨润土负载纳米零价铁对Cr(Ⅵ)的去除行为符合Langmuir-Hinshelwood模型,其kobs为0.011 97 min-1;草酸、柠檬酸、草酸钠和EDTA可促进B-NZVI对Cr(Ⅵ)的还原去除作用;柠檬酸钠则起到抑制作用. Cr（Ⅵ） is drawing widespread concern due to its toxicity and carcinogenicity.In this work,the removal of Cr（Ⅵ） by bentonite-supported nanoscale zero-valent iron（B-NEVI） was investigated.B-NEVI was synthesized by the reduction of Fe（Ⅲ） with NaBH4,and characterized by TEM and AAS.The removal kinetics and the influence on the removal rate of various organic ligands,including oxalic acid,citric acid,sodium citrate and sodium oxalate,were investigated in depth,and their influencing mechanisms were preliminarily discussed.The results indicated that the kinetic experimental data fitted the Langmuir-Hinshelwood equation with kobs of 0.01197 min-1,and that oxalic acid,citric acid,sodium oxalate and EDTA accelerated the removal of Cr（Ⅵ） while sodium citrate retarded the removal.
作者 孙芳 何广平 吴宏海 罗京
机构地区 华南师范大学化学与环境学院
出处 《环境科学研究》 EI CAS CSCD 北大核心 2011年第4期461-466,共6页 Research of Environmental Sciences
基金 国家自然科学基金项目(40773080 41072034) 广东省自然科学基金项目(10151063101000028)
关键词 膨润土 纳米铁 六价铬 有机配体 bentonite NZVI Cr（Ⅵ） organic ligand
分类号 X524 [环境科学与工程—环境工程]
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参考文献27

  • 1WANG X F , XING M L , SHEN Y, et al. Oral administration of Cr( VI ) induced oxidative stress, DNA damage and apoptotic cell death in mice[ J]. Toxicology,2006,228 : 16-23.
  • 2MIRETZKY P, CIRELLI A F. Cr (VI) and Cr ( Ⅲ ) removal from aqueous solution by raw and modified lignocellulosic materials : a review [ J ]. J Hazard Mater, 20 I0,180 : 1-19.
  • 3BHATTI M S, REDDY A S, THUKRAL A K. Electrocoagulation removal of Cr ( VI ) from simulated wastewater using response surface methodology [ J ]. J Hazard Mater,2009,172:839-846.
  • 4BARALS S, DAS N, CHAUDHURY G R, et al. A preliminary study on the adsorptive removal of Cr ( VI ) using seaweed, Hydrilla verticillata[ J]. J Hazard Mater, 2009,171: 358-369.
  • 5HONG H L, JIANG W T, ZHANG X L,et al. Adsorption of Cr(VI) on STAC-modified rectorite [ J ~. Applied Clay Science, 2008,42 : 292-299.
  • 6SEN M, DASTIDAR M G, ROYCHOUDHURY P K . Biological removal of Cr (VI) using Fusarium solani in batch and continuous modes of operation [ J ]. Enzyme and Microbial Technology, 2007,41 : 51-56.
  • 7GODEA F, PEHLIVANB E. Removal of Cr (VI) from aqueous solution by two lewatit-anion exchange resins [ J ]. J Hazard Mater B ,2005,119 : 175-182.
  • 8YOON J, SHIM E, BAE S,et al. Application of immobilized nanotubular Ti02 electrode for photocatalytic hydrogen evolution : Reduction of hexavalent chromium Cr( VI ) in water [J]. J Hazard Mater,2009,161:1069-1074.
  • 9ZHANG Y, LI Q,TANG R,et al. Electrocatalytic reduction of chromium by poly(aniline-co-o-aminophenol) : an efficient and recyclable way to remove Cr( VI ) in wastewater [ J ]. Applied Catalysis B : Environmental ,2009,92:351-356.
  • 10ZHOU H, HE Y, LAN Y, et al. Influence of complex reagents on removal of chromium ( VI ) by zero-valent iron [ J ]. Chemosphere, 2008,72 : 870-874.

二级参考文献58

  • 1Lo I M C, Lain C S C, Lai K C K. Hardness and carbonate effects on the reactivity of zero-valent iron for Cr( Ⅵ ) removal[J]. Water Res, 2006,40: 595-605.
  • 2Wang T G, Li Z H. High-temperature reduction of chromium Cr( Ⅵ ) in solid alkali [ J ]. Journal of Hazardous Materials, 2004,112: 63-69.
  • 3Lazaridis N K, Bakoyannakis D N, Deliyanni E A. Chromium ( Ⅵ ) sorptive removal from aqueous solutions by nanocrystalline akaganeite [ J]. Chemosphere, 2005,58( 1 ) : 65-73.
  • 4Song H, Carraway E R. Reduction of chlorinated ethanes by nanosized zero-valent iron: kinetics, pathways, and effects of reaction conditions[J]. Environ Sci Technol, 2005, 39 (16):6237- 6245.
  • 5Agrawal A, Tratnyek P G. Reduction of nitro aromatic compounds by zero-valent iron metal[ J]. Environ Sci Technol, 1996,30 ( 1 ) : 153- 160.
  • 6Nam S, Tratnyek P G. Reduction of azo dyes with zero-valent iron [J]. Water Res,2000,34(6) : 1837-1845.
  • 7Bang S, Korfiatis G P, Meng X. Removal of arsenic from water by zero-valent iron [ J ]. J Hazard Mater, 2005,121 : 61-67.
  • 8Zhang Y Q, Frankenberger W T. Removal of selenate in river and drainage waters by Citrobacter braakii enhanced with zero-valent iron [J] .Agric Food Chem,2006, 54:152-156.
  • 9Ponder S M, Darab J G, Mallour T E. Remediation of Cr( Ⅵ) and Pb( Ⅱ ) aqueous solutions using supported, nanoscale zero-valent iron [J]. Environ Sci Technol, 2000,34 : 2564-2569.
  • 10Li Z, Willms C, Alley J, et al. A shift in pathway of iron-mediated perchloroethylene Reduction in the presence of sorbed surfactant-A column study[J]. Water Res, 2006,40(20) :3811-3819.

共引文献54

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二级引证文献58

环境科学研究
2011年 第4期

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