ADSORPTIVE REMOVAL OF Cr(VI) AND Al(III) FROM AQUEOUS SOLUTION BY SUGARCANE BIOMASS

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    Cr(VI) AND Al(III) FROMAQUEOUS SOLUTION BYSUGARCANE BIOMASS

    Paramatma MishraTri-Chandra Multiple Campus

    Tribhuvan University

    Dr. Deba Bahadur Khadka Central Department of Chemistry,

    Tribhuvan University1

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    Presentati n !tlineIntroduction

    Experimental

    Results and discussion

    Conclusion

    Acknowledgement

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    Adsorption: A surface phenomenon effectively used forremoving metal ion from waste water

    Techniques like recipitation! ion exchange! reverse osmosis!solvent extraction etc are economically expensive with

    incomplete metal removal"Agricultural waste#rice husk! sugarcane $agasse! mai%e $ran!lapsi seeds! apple waste and many more& can $e thealternative! economically cheap and eco'friendly adsor$ent

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    Intr "!#ti n

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    b!e"tives of the study

    To prepare! modify and characteri%e low cost adsor$ent"

    To compare adsorption capacity of raw and modified

    adsor$ent

    To investigate effect of p(! contact time and initial

    concentration of metal ion"

    To study the nature of adsorption isotherm and adsorption

    kinetics

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    M "i$e" %aterial

    C n # &

    ' S

    O

    Sa##*ar!%+#inar!%

    ,as*e" -.rin"e"

    Grin"e"

    C * a r r i n .

    5

    E/0eri%ental1 Pre0arati n 2A"s r3ent

    Chemical treatment improves adsorption capacity to greater extentthan untreated adsorbent

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    Effect of chemical treatment

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    Characteri%ation of the adsor$ent

    )urface area #*ET technique&

    )E+ image

    IR spectra

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    *atch p( study

    ,ifferent sets of constant Cr#-I& . Al#III& solution with

    p( /'/0 each containing 12 mg of adsor$ent were shaken

    in mechanical shaker"

    3ptimum p( of Cr#-I& and Al#III& were determined"

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    *atch isotherm study

    Cr#-I& . Al#III& solutions of concentration /0 to 400mg56 each containing 12 mg of adsor$ent at their

    respective optimal p( were shaken in mechanical

    shaker"

    *oth 6angmuir and 7reundlich isotherms were used

    to descri$e adsorption $ehaviour

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    Bat#* 4ineti#s st!"5,ifferent sets of constant Cr#-I& . Al#III& solution each

    containing 12 mg of adsor$ent at their respective optimal p(

    were shaken for time /0! 10! 80! 40! 20! 90! 0! ;0!

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    #$M ima%e of ra& ' modified ba%asse

    !a"bagasse

    #odi$edbagasse

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    IR spectra of raw . modified $agasse

    !a" bagasse

    #odi$edbagasse

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    !a"%agasse

    #odi$ed%agasse

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    (ma) for Cr*+

    /0 10 20 /30 /40 //0 /10 /20 5300

    0.06

    0.0

    0.05

    0.070.3

    8 b s o r b a n " e

    9avelen%th

    (ma) :/ 0nm

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    (ma) for 8l*

    /0 10 20 /30 /40 //0 /10 /200

    0.3

    0.6

    0.4

    0.

    8 b s o r b a n " e

    9avelen%th

    (ma) : /40nm

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    0 3 6 4 / 5 10

    60

    0

    50

    70

    300

    !&C%#&C%

    ; a

    d s o r p t

    i o n

    0'

    $ffe"t of p< on Cr*+ removal

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    0 3 6 4 / 5 10

    60

    050

    70

    300

    !&C%#&C% ;

    a d s o r p

    t i o n

    preundli"h adsorption isotherm for Cr*+

    2

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    0 /0 300 3/0 600 6/0 4000

    0./

    3

    3./

    6

    6./'(x) * + 1x , +18!- * +99

    '(x) *!- *

    !&C%.inear (!&C%)#&C%.inear (#&C%) #

    e

    : 9 e

    ( .

    : L )

    # e (%.:L)

    RSCB

    MSCB

    =an%muir adsorption isotherm for 8l*

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    0 /0 300 3/0 600 6/0 400 4/00

    30

    60

    40

    0

    '(x) * + 4x , 4+21!- * +97

    '(x) * + 7x , 8+96!- * +87 !&C%

    .inear (!&C%)#&C%.inear (#&C%)

    t : 9

    t

    ( % i n : % . : .

    )

    Ti%e(%in)

    MSCB

    RSCB

    Pseudo-se"ond order kineti"s for the adsorption of 8l*

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    = removal of Cr#-I& . Al#III& depend upon p(! contacttime and initial concentration of the metal ion

    At p( /"0 maximum adsorption capacity for Cr#-I& foundto $e /8/mg5g #+)C*& and 1 mg5g#R)C*&

    Contact time for Cr#-I& was found to $e 8 hours

    At p( 9"0 maximum adsorption capacity for Al#III& foundto $e /12mg5g#+)C*& and 84mg5g#R)C*&

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    Con"lusion

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    Contact time 'or /l(000) "as 'ound to be 2 hours

    .angmuir isotherm 'ound to be best $tted

    seudo second order inetics model gave thebetter $t to the experimental data

    ence sugarcane bagasse can be used as analternative adsorbent "ith very high e ciencyo' removal o' Cr( 0) and /l(000)

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    Con"lusion*"ontd.

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    A#4n ;le".e%ent

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    ,epartment 3f ChemistryTri'Chandra +ultiple Campus

    ,r" ,e$a *ahadur >hadkaCentral ,epartment 3f Chemistry

    Tri$huvan ?niversity

    @epal Academy of )cience .Technology # ?8#T & >humaltar! 6alitpur

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    T*an4 Y !F r Y !r