ADSORPTIVE REMOVAL OF Cr(VI) AND Al(III) FROM AQUEOUS SOLUTION BY SUGARCANE BIOMASS
Transcript of 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$e" %aterial
C n # &
' S
O
Sa##*ar!%+#inar!%
,as*e" -.rin"e"
Grin"e"
C * a r r i n .
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E/0eri%ental1 Pre0arati n 2A"s r3ent
Chemical treatment improves adsorption capacity to greater extentthan untreated adsorbent
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Effect of chemical treatment
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Characteri%ation of the adsor$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*+
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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