挂膜沸石覆盖技术修复富营养化水体的研究徐金兰

徐金兰,　黄廷林,　蔡道健(西安建筑科技大学环境与市政工程学院,陕西西安710055)　　　:　将从水体沉积物中分离得到的硝化细菌、反硝化细菌固定在沸石上,利用挂膜沸石覆盖技术修复扬州段古运河和西安某人工湖两种富营养化水体。结果表明,对于沉积物的氮释放特性不同的两种水体,挂膜沸石覆盖技术均能有效抑制其内源氮的释放。扬州段古运河沉积物呈现初期释放氨氮、后期转化为硝态氮的特征,表面覆盖挂膜沸石层48d后,上覆水体的TN浓度为0.34mg/L(以硝态氮为主),沉积物中21%的总氮被去除。人工湖的沉积物则呈现持续释放氨氮的特征,以挂膜沸石层覆盖修复40d后,上覆水体的TN浓度为0.49mg/L(以氨氮为主),沉积物中52%的总氮被去除。　　:　挂膜沸石覆盖技术;　富营养化水体;　沉积物;　氮释放:TU991　　:A　　:1000-4602(2010)19-0037-04Bio-zeoliteCoveringTechnologyforRemediationofEutrophicWaterBodiesXUJin-lan,　HUANGTing-lin,　CAIDao-jian(SchoolofEnvironmentalandMunicipalEngineering,Xi'anUniversityofArchitectureandTechnology,Xi'an710055,China)　　Abstract:　Nitrifyingbacteriaanddenitrifyingbacteriaseparatedfromaquaticsedimentswereim-mobilizedonnaturalzeolite,andthebio-zeolitecoveringtechnologywasusedtoremediatetwoeutrophicwaterbodiesofGrandCanalinYangzhousectionandartificiallakeinXi'anCity.Theresultsindicatethatinspiteofdifferentnitrogenreleasecharacteristicsfromtwoaquaticsediments,thebio-zeolitecover-ingtechnologycaneffectivelyinhibitthereleaseofnitrogenfromthesediments.ForthesedimenttakenfromGrandCanalinYangzhousection,theammonianitrogenisinitiallyreleasedandislatertransformedintonitratenitrogen.Theconcentrationoftotalnitrogen(TN)intheoverlyingwateris0.34mg/L(basedonnitratenitrogen),and21%ofTNinthesedimentisremovedaftercoveringbio-zeolitefor48days.Forthesedimentfromartificiallake,theammonianitrogeniscontinuouslyreleased.TheTNcon-centrationis0.49mg/L(basedonammonianitrogen),and52%ofTNinthesedimentisremovedaftercoveringbio-zeolitefor40days.　　Keywords:　bio-zeolitecoveringtechnology;　eutrophicwaterbody;　sediment;　nitrogenre-lease　　:(2009ZX07317-007-1-2);　(50778147);　[2010KW-24(1)]·37·第26卷　第19期2010年10月　　　　　　　　　　　　中国给水排水CHINAWATERWASTEWATER　　　　　　　　　　　　　Vol.26No.19Oct.2010　　,,,。633,239,37.8%;391,61.7%;3,1%[1]。,,2156～25632mg/kg,1237.6～4504.7mg/kg,4.7～145g/kg[2]。,、[3～5]。,2070[6]。,、、、,,,。,,,,。、、,、,[7]。,、。1　材料和方法1.1　(WGX15、WGX18)、(HF3、HF7)、、[8]。,,1。1　Tab.1　Characteristicsofsediments　/%/%/%/(mg·kg-1)64.122.4513.451.4760.536.363.141.241.2　1.2.1　,48h,,,。:0.1g/L,NH4Cl0.02g/L,K2HPO40.02g/L,MgCl20.01g/L,CaCl20.01g/L。:0.1g/L,NaNO30.02g/L,K2HPO40.02g/L,MgCl20.01g/L,CaCl20.01g/L。1.2.2　4.8L。,1～2mm,1～2mm。,3000g,650mL,24h,1300mL,3d,。1.3　5.8L(17.5cm,24cm),5cm(70mL),1.0g/cm2,3cm,22cm,,,48d,,DO6mg/L。—5cm、、,,TN。《》。250mL,4.5%,25℃。2　结果与分析2.1　2.1.1　TN1TN。·38·第26卷　第19期　　　　　　　　　　　　　　中国给水排水　　　　　　　　　　　　　Fig.1　Variationoftotalnitrogenconcentrationintwowaters,5d6.94mg/L,5dTN8.05mg/d,13(7.12mg/L),,55%。[9],9TN(2.80mg/L),,50%,,,。,10dTN4.5mg/L,20d6.66mg/L,40d8.73mg/L,。,。,,13d1.73mg/L,32d0.5mg/L,48d0.34mg/L,Ⅲ(TN0.3mg/L),92.2%。,13d1.27mg/L,18d0.92mg/L,40d0.49mg/L,84.8%。,,,。,TN5.0mg/L2.0mg/L,,。2.1.2　TNTN,,TN0.98mg/kg,TN21%;0.7mg/kg,TN52%。,20%～50%,。2.2　,“”(、)(A,B)。2.2.1　A,5d(5.43mg/L),TN78.2%,,33d(2);NO-2-NNO-3-N,7NO-2-N(0.52mg/L),13NO-3-N(4.04mg/L),,、。、。,,。,,13d,48d;,,48dNO-2-N0.01mg/L,NO-3-N0.34mg/L,77.3%,,,[10]。·39·徐金兰,等:挂膜沸石覆盖技术修复富营养化水体的研究第26卷　第19期2　“”Fig.2　ConcentrationofNH+4-N,NO-3-NandNO-2-NinsedimentofGrandCanal2.2.2　B,NH+4-N,408.27mg/L,TN98.7%,;NO-2-NNO-3-N,,NH+4-NTN,、。NH+4-N。,,10d0.593mg/L,。、,,,。40dNH+4-N0.3mg/L,NO-3-N0.06mg/L,NO-2-N0.01mg/L。,,,、、。3　结论①　,5d6.94mg/L,5d8.05mg/d,13(7.12mg/L),,55%,、。,40d8.73mg/L,,。②　,,48dTN0.34mg/L,,21%。,40dTN0.49mg/L,,52%。:[1]　,.[M].:,2005.[2]　.(1)[M].:,1995.[3]　.[M].:,2002.[4]　.[M].:,1992.[5]　,,.[J].,1998,18(2):107-110.[6]　,,.[J].,2003,34(12):47-49.[7]　,,.[J].,2008,27(4):645-651.[8]　,,.[J].,2009,41(5):704-707.[9]　,,,.[J].,2005,24(5):500-503.[10]　,,.[J].,2009,3(1):85-88.:(1973-　),　,　,　,　。:[phone]E-mail:[e-mail]:2010-06-18·40·第26卷　第19期　　　　　　　　　　　　　　中国给水排水