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논문 기본 정보

자료유형
학술저널
저자정보
저널정보
한국환경과학회 한국환경과학회지 한국환경과학회지 제8권 제4호
발행연도
1999.8
수록면
491 - 496 (6page)

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Removal of Cu(Ⅱ), Cr(Ⅱ) and Pb(Ⅲ) ions from aqueous solutions using the adsorption process on the loesses has been investigated. Variations of contact time, pH, adsorption isotherms and selectivity of coexisting ions were experimental parameters. pH of KJ and YIK samples diluted to 1% solution, was rearly the same with each value of pH 5.58 and 5.49, and both samples showed weak acidic properties. From chemical analysis, both samples contain remarkably different amounts of SiO<sub>2</sub>, Al<sub>2</sub>O<sub>3</sub> and Fe_2O_3. From XRD measurement, quartz was mainly observed in both samples. Kaolinite was also observed, also in both samples, but Feldspar was only observed in KJ sample. Adsorption of metal ions on the loesses were reached at equilibrium by shaking for about 30min. The adsorption of Cr(Ⅲ) ion was higher than that of Cu(Ⅱ) and Pb(Ⅱ) ions. The order of amount adsorbed among the investigated ions was Cr(Ⅲ)>Pb(Ⅱ)>Cu(Ⅱ). In acidic solution, the adsorptivity of loesses was increased as pH increased. The adsorption of Cr(Ⅲ) ion on the loesses were fitted to the Freundlich isotherms. Freundlich constants(l/n) of KJ and YIK loesses were 0.54 and 0.55, respectively.

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