Helhetlig syn

5.4.1.1 Cinética de Adsorção

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$FLQpWLFDGHDGVRUomRIRLUHDOL]DGDSDUDGHWHUPLQDURWHPSRyWLPRGHDGVRUomRGRV tRQV6USHORKtEULGR&%&D+$2VUHVXOWDGRV DSUHVHQWDGRVQD)LJXUD LQGLFDUDPTXHRWHPSR GHHTXLOtEULRIRLGHGXDVKRUDV HTXHDUHPRomRGHtRQV6UQDIDVHIOXLGDHPUHODomRDRWHPSR DSUHVHQWRX XPDFLQpWLFDGHDGVRUomRIDYRUiYHO

)LJXUD ± &LQpWLFDGHDGVRUomRGH6U_{SHODPDWUL] &%&D+$ HP} IXQomRGRWHPSR&R PJ/S+ 

 :DQJet al  HVWXGDUDPRFRPSRUWDPHQWRGH DGVRUomRGHtRQV6U,,HP JpLV j EDVH GH GHULYDGRV GH SROLVVDFDUtGHRV RQGH XP GRV PDWHULDLV DQDOLVDGRV p D FDUER[LPHWLOFHOXORVH &0& ( FRQVWDWDUDP TXH HVVH SROLVVDFDUtGHR DOFDQoRX D FDSDFLGDGH Pi[LPD GH DGVRUomR EHP PDLV UiSLGD TXH D REVHUYDGD SDUD R KtEULGR &%&D+$ VHQGR SUHFLVRDSHQDV K SDUDDWLQJLURHTXLOtEULR$GLIHUHQoDGRUHVXOWDGRSRGHHVWDUUHODFLRQDGD D TXDQWLGDGHGHPDVVDXWLOL]DGDDYHORFLGDGHGHDJLWDomRHQWUHRXWURV

&KHQet al  FRPSDUDUDP DDGVRUomRGHtRQVFREUHHFKXPERHPPHPEUDQDV GH&%DGLFLRQDGDGHFDUER[LPHWLOFHOXORVH&0&HHPPHPEUDQDVGH&%SXUD2VDXWRUHV YHULILFDUDP TXH D FDSDFLGDGH GH DGVRUomR GH tRQV PHWiOLFRV SRU PHPEUDQDV GH FHOXORVH EDFWHULDQDSURGX]LGDFRPFDUER[LPHWLOFHOXORVH&0&IRL PDLRU GRTXHQDPHPEUDQDSXUDH RV YDORUHVGH DGVRUomRREWLGRVIRUDP PJ&XJPJ3EJGH&%HPJ&XJ PJ3EJGH &%&0& 5.4.1.2 Efeito do pH 2S+pXPSDUkPHWURHVVHQFLDOQDDYDOLDomRGDDGVRUomRSRLVIDFLOLWDQDRWLPL]DomR GDVFRQGLo}HVSDUDRVLVWHPDGHDGVRUomR$VFDUJDVGRDGVRUYHQWHHGRDGVRUEDWRGHYHPVHU RSRVWDVSDUDSURSRUFLRQDUXPDLQWHUDomRHOHWURVWiWLFD 2VUHVXOWDGRVREWLGRV),*85$GHPRQVWUDUDPTXH DFDSDFLGDGHGH DGVRUomR IRLGHSHQGHQWHGRS+SRLVKRXYH XPDUHGXomRQDDGVRUomRGHtRQV6UHPS+PDLViFLGRV SRGHQGR VHU H[SOLFDGR SHOD SRVVtYHO UHSXOVmR GDV FDUJDV VXSHUILFLDLV GR PDWHULDO FRP R DGVRUEDWRSRLVWHUHP FDUJDVLJXDLV $PDLRUDGVRUomRSDUDRKtEULGR&%&D+$RFRUUHXHPS+ (PS+PDLViFLGR DDGVRUomRIRLEDL[D

)LJXUD  (IHLWRGRS+QDDGVRUomRGH6U_{SHORKtEULGR} &%&D+$&R PJ/S+YDULDQGRGHj

 1HVWHFDVRSDUD RHVWXGRGHDGVRUomRpQHFHVViULRDXWLOL]DomRGHXPDIDL[DGHS+ RQGHDFDUJDVXSHUILFLDOGRPDWHULDOVHMDFDUUHJDGDQHJDWLYDPHQWHMiTXH RDGVRUEDWRXWLOL]DGR pXPFiWLRQ3RULVVRQRVHQVDLRVGHDGVRUomRIRUDPXWLOL]DGRVRS+QDWXUDOGHVROXomRSRLV GHPRQVWUDVHPDLVDGHTXDGR

1LVKL\DPDet al., WDPEpPFRQVWDWDUDP DGHSHQGrQFLDGRS+QDDGVRUomR GH tRQV 6U HPPDWHULDLVGHKLGUR[LDSDWLWD(OHVSURGX]LUDPFLQFRWLSRVGHPDWHULDLV HWHVWDUDPVXDV SURSULHGDGHVGHDGVRUomRGH6U_{FRQVWDWDUDPTXHTXDWURWLSRVGH+$ REWLGDVUHPRYHUDPGH} IRUPDHILFLHQWH RVtRQV6U FRPR DV SDUWtFXODVGH]HyOLWDV1DDYDOLDomRGRHIHLWRGRS+yWLPR GH DGVRUomR2VDXWRUHVYHULILFDUDP TXHFRPRDXPHQWRGRS+KRXYHRDXPHQWRGHDGVRUomRH TXHRYDORUPDLVDOWRGHDGVRUomRIRLHPS+ 5.4.1.3 Efeito da temperatura $WHPSHUDWXUDpFRQVLGHUDGDXPIDWRUOLPLWDQWHHPXPVLVWHPDGHDGVRUomR'HVVD IRUPDRHIHLWRGDWHPSHUDWXUDQDDGVRUomRGR6USHORKtEULGR&%&D+$IRLDYDOLDGRHPTXDWUR WHPSHUDWXUDVƒ&ƒ&ƒ&Hƒ&

2VYDORUHV GHDGVRUomR REWLGRV QDVWHPSHUDWXUDV ƒ&ƒ&ƒ&Hƒ&IRUDP  PJ GH6UJ GHDGVRUYHQWHUHVSHFWLYDPHQWH ),*85$ 2 DXPHQWR GH WHPSHUDWXUD GH ƒ& SDUD ƒ& SURSRUFLRQRX D DGVRUomR GH  PJJ H TXDQGR D WHPSHUDWXUDHOHYRXGHƒ&SDUDƒ&REVHUYRXVHXPDDGVRUomRGHPJJ (QWUH DV WHPSHUDWXUDVGHƒ& Hƒ& QmRKRXYHDXPHQWRVLJQLILFDWLYRRYDORUREWLGRIRLGHPJ GH6USRUJGHDGVRUYHQWH(VVHUHVXOWDGRLQGLFRXTXHƒ&pDWHPSHUDWXUDOLPLWHSDUDDXPHQWR VLJQLILFDWLYRQDDGVRUomRGH6UGRKtEULGR&%&D+$

)LJXUD ± (IHLWRGDWHPSHUDWXUDQDDGVRUomRGH6U _SRU &%&D+$&R PJ/7HPSHUDWXUDYDULDQGRGHj ƒ&

 2 DXPHQWRGDWHPSHUDWXUD FDXVRX XPDXPHQWRQDDGVRUomRFRQFRUGDQGRFRPRV UHVXOWDGRVGH6DEHU6DPDQGDUL et al., TXHWUDEDOKDUDPFRP FRPSyVLWRVGHFHOXORVH SROLDFULODPLGDKLGUR[LDSDWLWD SDUD UHPRomR GH tRQV FREUH 9HULILFRXVH D SDUWLU GH TXDWUR GLIHUHQWHVWHPSHUDWXUDVƒ&ƒ&ƒ&Hƒ& TXHQDWHPSHUDWXUDPDLVHOHYDGDƒ& REWHYHVH R PDLRU YDORU GH DGVRUomR H[SOLFDQGR HVVH IHQ{PHQR FRPR XP SURFHVVR HQGRWpUPLFR

7HRULFDPHQWH D TXDQWLGDGH DGVRUYLGD GHFUHVFH FRP R DXPHQWR GDWHPSHUDWXUD SRLVJHUDOPHQWHRVSURFHVVRVGHDGVRUomRVmRH[RWpUPLFRVRTXHVXJHUHDRFRUUrQFLDGHRXWUR IHQ{PHQRFRPR SHUPXWDGHFiWLRQVRQGHHVWiHQYROYLGRDWURFDL{QLFDGRFiOFLRHQFRQWUDGRQD KLGUR[LDSDWLWDFRPRHVWU{QFLRDGLFLRQDGRSRUHQVDLRGHDGVRUomRHPEDWHODGD

5.4.1.4 Isoterma de adsorção

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1D 7DEHOD  YHULILFRXVHTXH FRP R DXPHQWR GH WHPSHUDWXUD ƒ& R KtEULGR &%&D+$6U DGVRUYHX PDLVPJGH6USRUJGHDGVRUYHQWHDSUR[LPDGDPHQWH

 7DEHOD  3DUkPHWURVGRVtRQV6UREWLGRVSHORDMXVWHGDVLVRWHUPDVjƒ&Hƒ& 3$5Æ0(7526 4PD[6UPJJ .6U /PJ 5 &%&D+$6U ƒ& “ “  &%&D+$6U ƒ& “ “  )RQWH(ODERUDGDSHODDXWRUD