土壤中四環(huán)素與銅的吸附行為及其影響因素研究.pdf_第1頁
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1、南京林業(yè)大學(xué)碩士學(xué)位論文土壤中四環(huán)素與銅的吸附行為及其影響因素研究姓名：英德安申請學(xué)位級別：碩士專業(yè)：土壤學(xué)指導(dǎo)教師：陳金林20080601StudyofAdsorptionofTetracyclineandCopperinSoilsandImpactofFactorsonTheirAdsorptionABSTRACTTherehasbeenanincreaseconcentrationoftetracycline(TTC；H2L)an

2、dCuinsoilandtheyareposingmoreandmorecnVironmentalriskastheresultofdeVelopmentofagricultureandaccelerationofindustrializationandurbanizationOnthisbackground，adsorptionofTTCandCuinsoilsandsoilmineralsandimpactoffactorsonth

3、eiradsorptionwerestudiedbybatchexperimentsThemainresultsaresumm盯izedasfollowing：1)CuadsorptionintheRedsoil(RS)，Wushansoil(WS)andkaoIiniteincreasedwiththeincreasingsolutionCuconcentrationAdsorptionquantityofCuintheWSwashi

4、gherthanthatintheRSTTCstronglyadsorbedintheRS，WS，attapulgiteandkaoliniteAdsorptionquantityofTTCintheRSwashigherthanthatintheWSandthesameasattapulgitera也erthanthatonthekaoliniteFreundlichequationsfittheadsorptionisothe咖so

5、fCu髓dTTCinthesoils蛐dmineralswell2)WhentheequilibriumsolutionpHwasbelow50，60and63fortheRS，WSandkaolinite，respectiVely，TTCenhancedCuadsorptionwhichcouldbeduetothestrongerafnnityofTTCCucomplex(CuH2Lz十a(chǎn)ndCuHL十)totheadsorptio

6、nsitesthanCu2itself’orduetomoreCuadsorbedviatheTTCbridgeWhilethesolutionpHwasaboVe70，74如d74fortheRS，WS，montmorilloniteandkaolinite，respectiVely，TTCsuppressedCuadsorption，whichisascribedthatCureactedwithdissolVedTTCtoform

7、nochargedcomplexes(CuL)thathadlowera艏nitytothenegatiVechargedsoilormineralssurfaceincomparisonwithCuzitself3)WhenthesolutionpHwasbelow47fortheRSand34fortheWS，CusuppressedtheadsorptionofTTCinthesoils，whichisascribedthatTT

8、Cexistsascationic，zwitterionicandpositiVechargedconlplexesofTTCandCuspeciesatlowpH，andCudecreasedtheadsorptionofTTCduetocompetitionf0rtheadsorptionsites；whilethesolutionpHwasaboVe47fortheRSand34fortheWS，theadsorptionquan

9、tityofTTCincreased，whichisascribedthatathighpH，thecomplexesofTTCandCuhaVefewernegatiVecharges，andhaVehigherafjfinitytothenegatiVechargedsoilsurfacesthanTTCitselfInaddition，theadsorptionofTTCcantakeplaceonthesiteswhereCuw

10、asadsorbed，andactasabridgebetweenso訂particlesandTTC4)TwentyhourwasenoughforadsorptionequilibriumofTTCintheRSandtheWSThepresenceofphosphateandsulphatedecreasedtheadsorptionofTTCinthesoilsbycompetitionoftheadsorptionsiteso

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