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纳米铁系双金属-微生物体系去除地下水NO-3-N研究

Keywords: NO-3-N,纳米Fe0,纳米Fe/Ni,纳米Fe/Cu,反硝化细菌

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Abstract:

采用不同液相还原法制备纳米Fe0、Fe/Ni和Fe/Cu粒子,将其与反硝化细菌混合应用于地下水NO-3-N去除研究。考察3种体系对NO-3-N去除速率的影响,并对其脱氮产物及RNA水平上纳米铁系双金属对反硝化细菌的毒性效应进行了分析和讨论。结果表明,9d内纳米Fe0体系可完全将NO-3-N去除,过程中伴随NO-2-N先升高后降低的生成趋势,NH+4-N生成52%;纳米Fe/Ni体系脱氮速率最快,6d内可将NO-3-N完全去除,几乎未检测到NO-2-N的生成,而NH+4-N的转化率高达69%;纳米Fe/Cu体系7d内可将NO-3-N去除完全,NH+4-N的生成率降低,仅39%,但是出现33%NO-2-N积累。从反应前后反硝化细菌总RNA浓度变化看,3种纳米粒子对反硝化细菌的毒性大小为纳米Fe/Ni﹥纳米Fe/Cu﹥纳米Fe0。

References

[1]  国家环境保护总局,水和废水监测分析方法(第4版),北京:中国环境科学出版社,2002.
[2]  Till B.A;Weathers L.J;Alvarez P.J,Fe(O)-suppor- ted autotrophic denitrification,Environmental Science and Technology,1998(5).
[3]  Wang W;Jin Z.H;Li T.L,Preparation of spherical iron nanoclusters in ethanol-water solution for ni- trate removal,Chemosphere,2006(8).
[4]  孙丽莉 铁系复合材料的制备及去除地下水中硝酸盐氮的研究 [D].2008
[5]  Liou Y.H;Lo S.L;Lin C.J,Chemical reduc- tion of an unbuffered nitrate solution using catalyzed and uncatalyzed nanoscale iron particles,Journal of Hazardous Materials,2005(1-3).
[6]  Siantar D.P;Schreier C.G;Chou C.S,Treat- ment of 2-dibromo-3-chloropropane and nitrate-contamina- ted water with zero-valent iron or hydrogen/palladium cata- lysts,Water Research,1996(10).
[7]  Agrawal A;Tratnyek P.G,Reduction of nitro aromatic compounds by zero-valent iron metal,Science of the Total Environment,1991(1).
[8]  Smith R.L;Buckwalter S.P,Repert Small-scale hydrogen.oxidizing-denitrifying treatment of nitrate-contaminated drinking Research,tor for Water,2005(10).
[9]  Campos, JL ;Carvalho, S ;Portela, R ;Mosquera-Corral, A ;Mendez, R,Kinetics of denitrification using sulphur compounds: Effects of S/N ratio, endogenous and exogenous compounds,Bioresource Technology?,2008, 99(5).
[10]  Wakida F.T;Lerner D.N,Non-agricultural sources of groundwater nitrate:A review and case study,Water Re- search,2005(1).
[11]  Haugen K.S;Semmens M.J;Novak P.J,A novel in si- tu technology for the treatment of nitrate contaminated groundwater,Water Research,2002(14).
[12]  Kuan-Chun Lee ;Bruce E. Rittmann,Effects of pH and precipitation on autohydrogenotrophic denitrification using the hollow-fiber membrane-biofilm reactor,Water Research?,2003, 37(7).
[13]  Nel A ;Xia T ;Madler L ;Li N,Toxic potential of materials at the nanolevel.,Science?,2006, 311(5761).
[14]  Mansell B.O;Schroeder E.D,Hydrogenotrophic denitrifi- cation in a microporous membrane bioreactor,Water Research,2002(19).
[15]  Zhang W.X,Nanoscale iron particles for environmental remediation:On overview,Journal of Nanoparticle Re- search,2003(3).
[16]  An, Y ;Li, TL ;Dong, MY ;Li, QQ ;Wang, SM ;Jin, Z,Decreasing ammonium generation using hydrogenotrophic bacteria in the process of nitrate reduction by nanoscale zero-valent iron,Science of the Total Environment?,2009, 407(21).
[17]  Weihua Zhang ;Xie Quan ;Jingxian Wang ;Zhuoyong Zhang ;Shuo Chen,Rapid and complete dechlorination of PCP in aqueous solution using Ni-Fe nanoparticles under assistance of ultrasound,Chemosphere?,2006, 65(1).
[18]  Jing Feng ;Teik-Thye Lim,Iron-mediated reduction rates and pathways of halogenated methanes with nanoscale Pd/Fe: Analysis of linear free energy relationship,Chemosphere?,2007, 66(9).
[19]  Kyung-Hee Shin ;Daniel K. Cha,Microbial reduction of nitrate in the presence of nanoscale zero-valent iron,Chemosphere?,2008, 72(2).
[20]  Kesseru P;Kiss I;Bihari Z,Biological denitrifi- cation in a continuous-flow pilot bioreactor containing im- mobilized pseudomonas butanovora ceils,Bioresouree Tech- nology,2003(1).

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