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수용액으로부터 핏치계 활성탄소섬유에 의한 Cr6+, Cu2+, Ni2+ 이온의 흡착
Adsorption of Cr6+, Cu2+, Ni2+ Ions on Pitch-Based ACF from Aqueous Solution
HWAHAK KONGHAK, February 1998, 36(1), 68-72(5), NONE
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Abstract
활성탄소섬유를 이용하여 25℃, 240 rpm, 24hr의 조건에서 pH에 따른 크롬(VI), 구리(II), 니켈(II) 혼합물의 흡착 특성을 조사하였다. 크롬(VI)은 구리(II), 니켈(II)이 존재하여도 단일 성분일 때의 흡착 특성을 보여주었으나, 흡착량은 다른 두 금속 이온의 영향으로 감소하였다. pH 7 이하의 범위에커 구리(II)와 니켈(II)은 양으로 하전된 이온 상태로 흡착제에 흡착되었으며, pH 3을 중심으로 낮은 pH에서는 크롬(VI)이, 높은 pH에서는 구리(II), 니켈(II)의 흡착이 우세하였다. 크롬(VI),구리(II), 니켈(II)의 혼합용액이 최대 흡착량을 보인 곳은 pH 4-5 범위였다.
The adsorption characteristics of Cr(VI), Cu(II) and Ni(II) ions on ACF are investigated from aqueous solutions of various pHs at 25℃, 240 rpm and 24 hr. The adsorption of Cr(VI) on ACF in mixture with Cu(II) and Ni(II) shows the same trend as that in single component, while its amount of adsorption is decreased. Distribution diagrams of metal species indicate that Cu(II) and Ni(II) are positively charged ions below pH 7, and at pH<3 only Cr(VI) is adsorbed, whereas at pH>3 Cu(II) and Ni(II) are main metal species adsorbed. It is in the pH 4-5 where the total amount of adsorption of metal ions shows the largest value.
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Davis JA, James RO, Jeckie JO, J. Colloid Interface Sci., 63, 480 (1978)
Hohl H, Stumm W, J. Colloid Interface Sci., 55, 281 (1976)
Dugger DL, Stanton JH, Irby BN, McConnell BL, Cummings WW, Maatman RW, J. Phys. Chem., 68, 757 (1964)
Suzuki M, Carbon, 32, 577 (1994)
Shim JW, Jung HH, Jung CH, Oh WZ, Ryu SK, HWAHAK KONGHAK, 35(2), 162 (1997)
DeBoer JH, Lippens BC, Lippens BG, Broekhoff JCP, Heuvel A, Osinga TV, J. Colloid Interface Sci., 21, 405 (1966)
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Frumkin A, Kolloid, 51, 123 (1930)
Jung CH, Ph.D. Dissertation, C.N.U., Taejon, Korea (1994)
Kragten J, "Atlas of Metal-Ligand Equilibria in Aqueous Solution," Ellis Horwood, Chichester (1978)
Huang CP, Wu MH, J. Water Res., 11, 673 (1977)
Ruowen F, Hanmin Z, Yun L, Carbon, 32, 593 (1994)
