Li: Hini Thieng vd Dig Tap chi KHOA HOC & CONG NGHE 86(10): 107- 113 NGHIEN c u t ) KHA NANG HAP PHU Cu"", Ni^^ CUA THAN BA MIA
Le Huu Thieng , Hiia Thi Thiiy Trirdng Dgi hoc .Sirphgm - DHTN
TOMTAT .
Bai bao nay thong bao ket qua nghien ciru kha nang hap phu Cu"^ Ni"* trong dung dich nuoc ciia than ba mia (TBM). Anh huong ciia pH, nong dp cac ion kim loai va thai gian hap phu dugc nghien ciru a nhiet do phong (25 ± 1 "C). Nong do ciia cac ion Cu'~ Ni'* truac va sau hap phu dugc xac dinh bang phuong phap pho hap thu nguyen tu nggn lira (F- AAS). Cac ket qua thuc nghiem cho thay pH thich hgp cho sir hap phu Cu"' Ni"' tuong iing la 5,0 va 6,0. Thai gian dat can bang hap phu la 25 phiit cho Cu"' va 30 phiit cho Ni"'. Khao sat nong do tir 24,286 mg/l d^n 199,324 mg/l d6i vai Cu"'. tir 24,856mg/l dgn 198,184 mg/l cho Ni"' theo mo hinh hap phu dang nhiet Langmuir, ket qua nghien ciru cho thay : dung lugng hap phu cu'c dai ciia TBM doi voi Cu"' va Ni"' lan lugt la: 54,054 mg/g va 44.843 mg/g. TBM hap phu Cu"' tot ho'n Ni"' Dgng hge hap phu Cu"' va Ni"' ciia TBM tuan theo phuong trinh bac hai bieu kien ciia Lagergren.
Til' khoa: hdp phu, than bd mia, kim logi ngng. dong, niken.
MO DAU
Hien nay, moi truong nuoc o nhieu do thj, khu cong nghiep va lang nghe ngay cang bi 6 nhiem boi niioe thai, khi thai va chat thai ran.
Vi vay nghien ciru va tim bien phap xir ly 6 nhiem moi truong nuac la can thiet va cap bach. Viec sii' dung than ehe tao tir cac phu pham nong nghiep nhu: vo triiu. vo lac, vo dira, ba mia...de tach loai va thu boi eac kim loai nang tir dung dich nuoc da dugc mgt sci tac gia tren the gioi nghien ciru [1,2,3,4,6,7,8]. Cac loai than nay co kha nang iing dung rat Ion trong xir ly cac nguon nucic bj 6 nhiem kim loai nang.
0 Viet Nam, ba mia la phu pham nong nghiep rat pho bien. Ci bai bao truoc [1], chiing toi da nghien ciru su hap phu Cu"* va Ni'* ciia than vo lac. Ket quii cho thiiy kha nang hap phu ciia than vo lac la kha tot. Trong bai bao nay chiing toi trinh bay mot so ket qua nghien ciru kha nang hap phu Cu"* va Ni"* ciia TBM trong dung djeh nuoc.
THUC NGHIEM Hoa chat va thiet bj
* Hoa chat: H2SO4 98%. CuS04.5H:0. NaOH.
HNO,. NiS04.6H:0. nuoc cat hai lan. Cac hoa
• Tel: 0982 859002
chat diing cho cac thi nghiem deu la loai tinh khiet PA.
* Thiet bi:
- May nghien. miiy liie, tii siiy. may do pH.
- May quang pho hiip thu ngu>en tir Thermo (Anh).
- Nong dp ciia Cu"*, Ni"" trong dung djeh tru'cie va sau biip phu dupe xac djnh bang phuong phap pho hap thu nguyen tir nggn lu'a(F- AAS).
Cae dieu kien do pho F-AAS ciia Cu, Ni dupc chi ra a bang 1.
Bang 1. Cac dieu kien do pho F-AAS cua Cu. Ni
Nguyen to Buac song (nm)
Khe do (nm)
Cuimg do den HCL(l„,j,x) Chieu cao d(in (mm) Toe do dong khi (ml/phut) Khoang tuyen tinh mg/l
Cu 314,5
0.5 75%
7 1.1 0,05 - 2.5
Ni 232 0,5 75%
7 11 0.1 - 8,0
Che tao TBM tir nguyen lieu ba mia
Ba mia sau khi riia sach dugc cat nho, cho vao nuoc cat dun soi trong 30 phiit d^ loai bo duong hoa tan. sau do siiy kho ci 80"C trong 24 gia. Ba mia kho dugc nghi(;n
107
Le Hiru Thieng vd Dtg Tap chi KHOA HOC & CONG NGHE 86( 10): 107 - 113 thiinh bcit mjn (nguyen lieu dciu). Trcin Nghien cu'u dong hoc hap phu ciia TBM nguven lieu voi H2S0,| dac theo ti le 1:1 theo phuo'ng trinh cua Lagergren.
(nguyen lieu (g) : axit sunfuric (ml)), sau do Phuong trinh dpng hoc hap phu bieu ki^n bac dem nung a 150"C trong 24 gia. Nguyen nhat Lasersren [5].
Ii(§u sau khi say ducTC rua sach bang nuoc -
Ciit hai Lin vii ncam tronti duns dich NaHCOi ~i7^^'^'^- ~^ld- 1% trong 24 gia de loai bo axit du. Lpc lay ba
riin va tiep tuc sa_v 6 150"C cho den kho roi
dt
Dang tich phiin ciia phuong trinh tren la:
dem nghien nho.rii> thu liiy b(it mjn cci kich log(^/ - c / ) = loei:/ ^' ; thucichatco' <0.02mm. t h u d u p c T B M [2]. - .• ' ^ . 2.303
Phu'O'ng phap thye nghiem Phirong trinh dong hpc hiip phu bieu kien bac Chung tiii nghien ciru kh<i nang h.ip phu C u " . *^° dang:
Ni" ciia TBM thong qua kbiio sat iinh huong cua thoi gian hiip phu. pH. ncing d(3 diiu cua Cu"'. Ni"" . xiic djnh dung lugng hap phu cue dai cua TBM \ a nghien ciru d(5ng hoc hiip phu theo phuang trinh cua Lagergren.
Dung lucTiig luip phu cua TBM dugc tinh
theo eon" thirc '"''' ' '"'''''" '^'"^S lirgng hdp phu tgi thdi diem Dang
Troim tieh
; do:
phiin
cit '
eua / '/,
= A-, UL- phu'on,
1 k._ •r.
-'!.) g tr 1 'A.
r inh r
nay- la:
(C.~^'.J\' cdn bdng vd tgi thdi diem t (mg g).
„., kl, kl Id hdng sd tdc do hdp phu bgc nhdt (phiii') Tron" do' ^'" ^^'' ^'^" (?-"'s'- ph'"''} bieu kien.
q: dung Im/ng hdp phu (mgg). KET QU A V A T H A O L U / \ N
I Thi' lich dung dich (I). Khao sat anh hu'ong ciia pH den kha nang in: Khoi Imnig chdt hdp phu (g ). hap phu ciia TBM
C,. . Cj. : Ndng do ban ddu. nong dd tgi thdi Cliuiin bj ciic binh tam giiic co dung tich diem can bdng cua clung dich (mglj. 1 QQ ml. Cho 0.1 g TBM vao m6i binh va them \iio dci 100 ml dung dich chira rienc Dung lugng hap phu cue dai ciia TBM re eac ion kim loai C u - . ^ N i ' ' co ndng d6 dugc xac dnih theo phuong trinh dang ^^^ dinh, pH thav ddi tir H 6. Ti^n hanh nh,(?t Langmuir dang tuyen tinh: i j , ^,^.- ^^^ ^^^ 250 vong/phiit trong 30
^^J_Q 1 phiit a n h i e t do p h o n g (25 ± r C ) . Xac 4 4m ' '-Im-b '^i'^'^ nong dp eon lai eiia cac ion kim loai Tron"d6' trong dung dich t u a n g irng vai cac gia tri q,,,: dung lugng hap phu cue dai ( m g / g ) .
b: bans so Lanmnuir,
pH do bang phuong phap F- AAS.
Ket qua dugc chi ra 6' bang 2 va hinI Biing 2. Anh huang ciia pH d^n dung lugng h§p phu cua TBM
pH C"" Ni^*
Cotnig/IJ C,i,(mg/0 q(iTig/g) C,(mg/I) C,i,(mg/I) q(mg/g)
1 48.907 40.325 2.146 49.064 42.546 1.629 2 48.907 36.468 3.109 49.064 38.349 2.679 3 48.907 20.115 7.198 49.064 23.976 6.272 '^ 48.907 16.079 8.207 49.064 20.920 7.036 5 48.907 11,711 9.299 49.064 18.212 7.713 6 48.907 11,771 9.284 49.064 16.936 8.032
Le Him Thieng vd Dig Tap chi KHOA HOC & CONG NGHE 86(10): 107- l i ; djnh 6' dieu kien pH toi iru xac djnh a muc 3.1. Tien hanh lae tren may lac voi toe do 250 vong/pluit d nhiet dp phong (25 ± 1 C) trong khoang thdi gian tir 5 -^ 60 pbiit.
Ket quii dupc chi ra d b^ing 3 va hinh 2.
Hinh \. Su phu thugc ciia dung lugng hap phu vao pH Ket qui) thuc nghiem cho thay trong khoang pH tir I -^ 3 dung lugng hap phu eua TBM ddi vdi Cu"', Ni"* tiing nhanh, cdn d pH tir 3-^6 tang
chain. Dieu nay cd the do d pH eao cd sir hinh thanh phirc hidro.xo eiia cac kim loai da lam han che su hap phu ciia TBM. Chimg tdi chgn pH = 5 cho cae dung djeh Cu"', pH = 6 cho cac dung djeh Ni" de nghien ciru cac qua trinh hap phu tiep theo.
Khiio sat thin gian dat can bang hap phu
Tien hiinh sir hiip phu ddi vdi 0,lg TBM d cac ndng do diiu Cu"', Ni"' cd dinh. giir dn
10,000 8,000 5 6,000 - 4000 2,000
0 0
> ^ „ " - » • « •
20 40 60 tho-l gian (phut)
80 - • — C u - • — M
Hinh 2. Su phu thugc ciia dung lugng hap phi,i viio thai gian xu ly
Ket qua thuc nghiem eho thay: vdi thdi gian lac tir 25 phiit trd len ddi vcii Cu" va 30 phiit ddi vcii Ni"' dung luiTng hiip phu ciia TBM gan nhu khdng thay ddi (h(5 dat trang thai ciin bang). Do \ a \ cluing tdi chgn thai gian dat can biing hap phu eua TBM ddi vcii C i r ' la 25 phiit, Ni"' lii 30 phiit cho ciic thi nghiem tiep theo.
T h o i gian (phiit)
10 20 25 30 35 40 50 60
B a n g 3.
C„(mg/I) 49.284 49.284 49.284 49.284 49.284 49.284 49.284 49.284
A n h h i r o n g cua C u ^ * C,i,(mg/I)
23.040 17.224 12.024 13.784 13.344 13.228 12.624 12.472
thi)i gian den
q (nig/g) 6.561 8.015 9.315 8.875 8.985 9.014 9.165 9.203
d u n g l u g n g hiip
f'„Oiig/l) 48.438 48.438 48.438 48.438 48.438 48.438 48.438 48.438
p h i ciia I ' B M Ni^*
( • , „ ( " i g / l ) 26.884 22.456 18.869 16.209 17.346 17.264 16.692 16.585
q i m g / g ) 5.389 6.496 7.392 8.022 7.772 7.794 7.936 7.964
Bang 4. Cac thong so hap phu ciia TBM
Cu^ Ni^
Cp (mg/0 24.286 53.822 73.268 102.463 148.928 199.324
Cci, (mg/l) 1.63 1 3.724 6.682 10.053 20.348 39.982
q (mg/g) 5.664 11.526 16.647 22.103 32.145 39.836
Ccb/q (g/l) 0.288 0.323 0.401 0.455 0.633 1.004
C „ (mg/l) 24.865 52.234 74.982 104.042 149.822 198.184
C c b ( m g / 0 2.724 5.073 10.542 16.437 36.458 58.986
q (mg/g) 5.536 10.791 16.110 20.653 28.341 34.799
Cc„/q (g/l) 0.491 0.469 0.654 0.796 1.286 1.695
109
Le Hint Thieng vd Dtg Tap chi KHOA HOC & CONG NGHE 86(10): 107- 113
Khao sat anh hu'ong ciia nong do Cu *, Ni ^ den kha nang hap phu ciia TBM
Tien hanh su hap phu doi vdi 0,1 g TBM d cac nong do dau Cu"*, Ni"'thay doi, giu dn djnh d dieu kien pH toi uu xac dinh d muc 3.1. Tien hanh l§c tren may lac vdi tdc d(3 250 vong/phiit d nhiet do phdng (25 ± 1 C) trong khoiing thdi gian can b§ng ddi vdi mdi ion da dugc xac djnh d muc 3.2. Ket qua dugc chi ra d biing 4 va hinh 3.
Kit qua bang 4 cho thay: khi tang ndng do Cu^"", Ni"* dung lugng hSp phu ciia TBM tang. Til' hinh 3 cho thay su hap phu Ni"* ciia TBM dugc md ta kha tot theo md hinh dang
nhiet hap phu Langmuir. Tir dd, chimg toi tinh dugc dung lugng hap phu cue dai q,„ ciia TBM doi vdi Cu"'. Ni"', tuong img la 54,054 va 44,843 mg/g.
Nghien ciru dong hoc hap phu Cu *, M^*
cua TBM
Gia sir qua trinh hap phu eiia VLHP .xay ra theo phuong trinh dpng hpc bieu kien ciia
Lagergren.
Tir ket qua bang 5,6 bilu dien sir phu thuoc eiia log(q^-qi), q/t vao t ta thu dugc dd thj mo ta dgng bgc hap phu bieu kien cua Cu"*. Ni"*
nhu hinh 4, 5.
1.2 1
=•0,8 0-0,6
S 04
0,2 0
0 10
y = 0,0185x•^ 0,2629 R2 = 0,9989
20 30 Ccb(mg/I)
40 50
Hinh 3a.
y=0,0223x+0,414 R2 = 0,9929.,
Hinh 3b.
Hinh 3. Duong dang nhiet hap phu Langmuir dang tuy^n tinh ciia TBM d6i vai Cu"*(hinh 3a) va Ni"*(hinh 3b)
Bang 5. Cac thong so hap phu ciia Cu"*
Thoi gian (phut)
10 20 25 30 35 40 50 60
C„(mg/1) 49.284 49.284 49.284 49.284 49.284 49.284 49.284 49.284
Ccb(mg/I) 23.040
17.224 12.024 13.784 13.344 13.228 12.624 12.472
q (mg/g) 6.561 8.015 9.315 8.875 8.985 9.014 9.165 9.203
Log (qe-qt) 0.044 0.114
-0.364 -0.482 -0.509 -0.823 -0.923
Cu t/q 1.524 2.495 2.684 3.380 3.895 4.438 5.456 6.519
2 +
C„(mg/) 98.862 98.862 98.862 98.862 98.862 98.862 98.862 98.862
Ccb(mg/1) 36.234 32.452 25.325 27.326 26.424 26.302 25.902 25.662
q (mg/g) 15.657 16.603 18.384 17,884 18.109 18.142 18.240 18.302
Log (qe-qt) 0.436 0.251
-0.301 -0.562 -0.613 -0.842 -1.076
t/q 0,639
1.205 1.360 1.677 1.932 2.205 2.741 3.278
"-" khdng xdc dinh
Le Him Thieng vd Dtg Tap chi KHOA HOC & CONG NGHE 86(10): 107- 113
05 Z- 0
o- 0 0 . - D 5 o
-1
•15
y =
i ^
• 0=49,284 mg/l
• 0=98 862 rrg.'l -0 0223X+0 3597
R^= 0 9321 . . . .
2 0 ^ ^ 5 ^ 4 D 60 80
y = -0 0 3 1 9 x + 0 7 j s < ; i R' = 0 9575
thffi gian (phut)
7 6 •
• 5 5 E
•54
y = 0 1011x* 03876 R- = 0 9956 / ^
« C=49 284 mg/l
• 0=98 863 mg/l
y = 0 0527x • 0 1003
20 40 60 80 thdi gian (phut]
Hmh 4a. H i n h 4 b .
Hinh 4. Do thi phuang trinh dong hoc bac l(hinh 4a) va bac 2 (hinh 4b) cua Cu"'
Bang 6. Cac thong so hap phu ciia Ni"*
Tho'i Ni'"
gian
(phut) CXmg/l) Qi,(mg/1) q (mg/g) Log (qe-qt) t/q C„(mg/I) C,„(mg/l) q (mg/g) Log (qc-qt) t/q 10
20 25 30 35 40 50 60
48.438 48.438 48.438 48.438 48.438 48.438 48.438 48.438
26.884 22.456 18.869 16.209 17.346 17.264 16.692 16.585
5.389 6.496 7.392 8.022 7.773 7.794 7.936 7.937
0.421 0.184 -0.201
-0.604 -0.641 -1.066 -1.229
1.856 3.079 3.382 3.739 4.503 5.132 6.301 7.534
98.962 98.962 98.962 98.962 98.962 98.962 98.962 98962
54.926 45.879 38.550 33.112 35.439 35.271 34.104 33.883
11.009 13.271 15.103 16.462 15.881 15.923 16.215 16.271
0.737 0.504 0.133
-0.236 -0.268 -0.607 -0.716
0.908 1.507 1.655 1.822 2.204 2.512 3.084 3.688
1
05
Z 0
1 « S-05
1 .1 •
-15
•
10
\ ^
20
y = -00307x* 09891 R^ =09592
>NiO i ^ ^ i l 50
y = .0034«<*0 746 > . . R" = 09738
\i\o\ gianlphul)
60 70
< C=48 438 mg/l
• C=98 9624 mg/l 8 7
IDUl
S 4
| 3
" 2 1 0
0 10
i ^
20
y = 01131i»06234 R" = 0 9 9 » /
^ ^ ^ ^ • - ' ^ p O C654< • 0 3036 . ^ ' ^ ^ R-=09932
30 40 50 60 thoi glan(ptiut)
70
• C=98 962 mg/l 1 C=«,43emg/I
Hinh 5a. Hinh 5b.
Hinh 5. D6 thj phuong trinh dong hoc bac l(hinh 5a) va bac 2 (hinh 5b) cua Ni"
Ion
Cu^'
Bang 7. Mcit s6 tham so theo dpng hoc hap phu bac I ciia Cu^* va Ni"
Nong do
(mg/l)' Phuo'ng trinh R^
(phiir') qc.o>|,(mg/g) Me,cai (mg/g) 49.284 Log(q,-i],)=0.7284-0.03I9t 0.9575 0.0735 5.3506 12.024 98.836 Log(q,-q,)=0.3597-0.0223t 0.9321 0.0514 2.2893 18.384
Ni'*
48.438 Log(q,-q,)=0.989l-().0307l 0.9592 0.0707 9.7521 8.0224 98.9624 Log(iie-q,)-0.746-().0348l 0.9738 0.0801 5.5702 16.4618
111
Le llini Thieng vd Dtg Tap chi KHOA HOC & CONG NGHE 86(10): 107- 113 Bang 8. Mot sci tham so theo dong hoc hap phu bac 2 cua Cu"' va Ni"*
Ion N'ong do (mg/l) Phuong trinh R" k2(g.mg''.phut'') q..c>|i (mg/g) qp.t;,i(ing/g) 49.284 - =0.3876^0.101 ll 0995^, 0.0263 9.8912 12.024 Cu"
98.836 ~ =0.0527+0.10031 ,w)<.«-7 </ 0.9987 0.4369 9.9701 18.384
Ni^
48.438 98.9624
^=0.6234+0.11311 , , y , 3 ,
-=0.3036+0.05541 „ n o n '/ 0.9932 0.0205 0.0101
8.8404 18.0505
8.0224 16.4618 Qi-cxp • qe.uii Id gid tri dung Im/ng hdp phu cdn bdng tinh theo phirong irinh ddng hoc, theo thirc nghiem.
Tir bang 7. 8 ta thay a cac nong dcT khac nhau cua Cu"* . Ni"* thi p h u o n g trinh dgng hge bac nhat bieu kien eho ket qua qe.oxp khae nhieu so vai Qe.cai h? SO tin ca\ R" c h u a cao (R" <0.98).
Phuong trinh dgng hoc bac hai bieu kien cho ket qua q^.^x,, t u o n g doi phii hgp so voi qcai va he so tin cay R" kha cao (R" >0.99). Co the ket luan qua trinh hap phu C u " ' . N i " ' ciia T B M tuan theo qu}' luat d g n g hoc bae hai cua Lagergren.
K E T LUAN
- Da che tao ducTc T B M tir ba mia thong qua xir ly bang axit sunfuric.
- Da khao sat cae yen to anh buong den sir hSp phu ciia TBM Cu" . Ni"':
+ pLl toi uu cho su hap phu: Cir* la 5. Ni"' la 6 + Thai gian dat can bang hap phu: Cu"* la 25 phiit. Ni" la 30 phiiL
+ Khi tang nong do dau Cu"*. Ni"" thi dung lugng hap phii cua T B M tang.
- Da xac djnh d u g c dung l u g n g hap phu cue dai cua T B M : d6i voi ion Cu"' la 54,054 mg/g, Ni" la 44,834 mg/g.
- Dgng hoc hap phu cua TBM doi \ a i Cu"*, Ni"' xay ra theo phuong trinh bac hai bieu kiln cua Laaerizren.
TAI LIEU T H A M K H A O
[1]. Le Huu Thieng. Nguyen Thi Nhu Quynh (2010). Nghien cim kha ndng hdp phu Cu' . Nr cua than vo Igc. Tap chi Phan tich Hoa. Ly va Sinh hoc. Tap 15, so DB. Trang 160 -164
[2]. A.G.Liew Abdullah, MA. Mohd Sailed.
M.K.Siti Mazlina, M.J Megat Mohd Noor. M.R Osman, R.Wagiran, and S.Sobri, "A:o dye removal by adsorption using waste hiomass: Sugarcane bagasse", international Journal of engineering and technogy. vol.2, No.1. pp. 8-13, (2005).
[3]. C. Namasiva>am and K. Periasam\ (1993), Bicarbonate - Treated peanut hull carbon for mercwydlj removal from aqueous solution. Water Res. Vol. 27. No. 11. pp, 1663 - 1668.
[4]. G Issaba\eva. Aroua M K & Sulaiman N M N (2006). Removal of lead from aquemis solution on palm shell activated carbon. Biores Technol, 9 7 , 2 3 5 0 - 2 3 5 5 .
[5]. E. Pena Maria, George P.Kofiatis. Manish Patel. Lee Lippincon. Xiaaguang Meng (2005).
Adsorptin ofAs(V) and As(lll) by nanocrystalline titanium dioxide. Water Res. 39. pp.2327-2337.
[6]. K A Krishnan & Anirudhan T S (2003).
Removal of cadmium(ll) from aqueinis solutions by steam activated sulphurised carbon prepared from sugar-cane bagasse pith: kinetics ami
equilibrium studies. Water SA. 29. 1 4 7 - 156.
[7]. S. Tangjuank. N.lnsuk, J.tontrakoon. V.Udeye (2009). Adsorption of lead(ll) and cadimiiimllll ions from aqueous solutions hy adsorption on activated carbon prepared from eushewnut shells.
World Academy of Science. Engineering and Technology, 52.
[8]. Wilson Kernit, Hong Yang. Chung W.Seo.
Wayne E.Marshall (2006). .Select metal adsorption by activated carbon made Jrom peanut shells.
BioresoNfce Technoloav. Vol. 97. 2266 - 2270.
Le Hihi Thichig vd Dtg Tap chi KHOA HOC & CONG NGHE 86(10): 107-1
S U M M A R Y
I N V E S T I G A T I O N ON T H E A D S O R P T I O N O F Cu"* A N D Ni"*^
OF S U G A R C A N E B A G A S S E C A R B O N
Le Huu Thieng', Hua Thi Thuy College oJ'lidiicalion - Thai .\gu\eii i iiiver.siiy
This paper reported the research of the removal of adsorption Cu"*. Ni"' from aqueous solution of sugarcane bagasse carbon (SBC).The effect of pH, initial metal ion concentration and contact time were studied at room temperature ( 25 ± 1 'C). The analysic of Cu"', Ni"* ions concentration before and after adsorption by method of universal flame atomic adsorption (F-AAS).The results showed that as optium pH value of Cu" and Ni"* is the order of 5,0 and 6,0; contact time is 25 minutes for Cu"*, and Ni" ' for 30 minutes .In surveying the concentration range (from 24,286 mg/l to 199,324 mg'l for Cu"', from 24.865 mg/l to 198,184 mg/l for Ni"') using the Langmuir model. Results of studies, show that the amount of cation adsorbed per unit mass of SBC was 54.054 mg/g with Cu" and 44.843 mgg with Ni"'. SBC absorpted Cu'" is better than Ni"*. The kinetics of Cu"*and Ni" adsorption on SBC follow the two order rate expression given by Lagergren. .
Key words: adsorption, sugarcane hagasse carbon, heavy metal, copper, nickel.
0»,
• Tel: 0982 859002
113
