수용액에서 칼사이트형 탄산칼슘에 대한 납이온(II)의 흡착특성 (Adsorption Characteristics of Pb(II) on Calcite-Type Calcium Carbonate in Aqueous Solutions)

서지정보

· 발행기관 : 한국화학공학회
· 수록지 정보 : Korean Chemical Engineering Research(HWAHAK KONGHAK) / 40권 / 1호 / 22 ~ 27페이지
· 저자명 : 홍성철, 김문선, 정재관

초록

In this article, adsorption experiments were performed to remove effectively the lead ion(Pb2+) in aqueous solu-tions by the calcite-type calcium carbonate in a reactor to be placed both the lead solution of 10 Pb2+mg/l and the calcium car-bonate of 1.5 g/l. Reliabilities of Langmuir and Freundlich adsorption isotherms were 97% and 76%, respectively, and thereliability of Langmuir adsorptiom isotherm was higher than that of Freundlich adsorption isotherm. The adsorption amountincreased rapidly in range from pH 1.6 to pH 4 and then the 98% of total adsorption amount was approached at pH 4. Over pH4, the variation of the adsorption amount was rarely observed. Adsorptivity of a calcium carbonate with the pretreatment of20% and 35% HCl solutions was increased by 20.5% and 14.1%, respectively. Ca2+ concentration in aqueous solutionsincreased with an increasing adsorption amount of Pb2+ on CaCO3 but the variation of a Ca2+ concentration by using the pre-treated CaCO3 was seldom observed.

영어초록

In this article, adsorption experiments were performed to remove effectively the lead ion(Pb2+) in aqueous solu-tions by the calcite-type calcium carbonate in a reactor to be placed both the lead solution of 10 Pb2+mg/l and the calcium car-bonate of 1.5 g/l. Reliabilities of Langmuir and Freundlich adsorption isotherms were 97% and 76%, respectively, and thereliability of Langmuir adsorptiom isotherm was higher than that of Freundlich adsorption isotherm. The adsorption amountincreased rapidly in range from pH 1.6 to pH 4 and then the 98% of total adsorption amount was approached at pH 4. Over pH4, the variation of the adsorption amount was rarely observed. Adsorptivity of a calcium carbonate with the pretreatment of20% and 35% HCl solutions was increased by 20.5% and 14.1%, respectively. Ca2+ concentration in aqueous solutionsincreased with an increasing adsorption amount of Pb2+ on CaCO3 but the variation of a Ca2+ concentration by using the pre-treated CaCO3 was seldom observed.

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