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활성탄에 대한 카드뮴킬레이트 화합물의 흡착특성
Adsorption Characteristics of Cd-Chelate Compounds on Activated Carbon
HWAHAK KONGHAK, October 1985, 23(5), 313-320(8), NONE
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Abstract
Amino carbonic acid계（NTA, EDTA, DTPA）와 Amin계(Phen, TEA) 킬레이트 시약을 사용하여 활성탄에 Cd(II)을 흡착시키므로 pH, 몰비[Rm=킬레이트 시약/Cd(II), mol/mol), 킬레이트 시약의 흡착성 및 배위자의 영향을 조사하였다. EDPA, DTPA 및 Phen을 사용했을 때 몰비(Rm)에 따라 최적 pH영역이 이동하는 현상을 볼 수 있었으며, NTA와 TEA는 Cd이온의 제거에 효과적이 아님을 알 수 있었다. 그 최적조건은 DTPA인 경우 Rm=1, pH 5에서 Phen인 경우 Rm=10, pH 5일 때 Cd(II)[초기농도 10 mg/l]의 약 95 %를 제거할 수 있었다.
The effects of PH, molar ratio [Rm=chelating agent/Cd（II）, mol/mol], adsorptivity of chelating agent and ligand for adsorption of Cd(II) by activated carbon were investigated by using Amino carbonic acid group (NTA, EDTA, DTPA) and Amin group (Phen., TEA) as a chelating agents. It was found that the optimal PH was shifted with the increasing molar ratio (Rm) of EDTA, DTPA and Phen. and that TEA and NTA were not useful to remove Cadmium ion. Under the optimal condition PH=5, Rm=1(DTPA) and PH=5, Rm=10(Phen.), the removal percent of Cd(II) [initial concentration=10 mg/l] was about 95 %.
