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    Please use this identifier to cite or link to this item: https://ir.fy.edu.tw:8080/ir/handle/987654321/1804

    Title: Cadmium adsorption on goethite-coated sand in the presence of humic acid
    Authors: Lai,Chin-Hsing;Chen, Chih-Yu Chen,;Wei, Bai-Lu;Yeh, Shu-Hsing
    Contributors: 輔英科技大學 環境工程與科學系
    Keywords: Adsorption;Cadmium;Coating;EDAX;Goethite;Humic acid
    Date: 2002-12
    Issue Date: 2010-09-24 17:27:34 (UTC+8)
    Abstract: Heat was employed to coat crystalline goethite onto a quartz sand surface so that the adsorbent properties of the coating could be utilized. The adsorption characteristics of cadmium and humic acid onto goethite-coated sand were examined. Results show that the goethite-coated sand surface had a higher specific surface area and more mesopores than the uncoated sand. The adsorption of both cadmium and humic acid was highly pH-dependent: cadmium adsorption increased with pH, but humic acid adsorption decreased as pH increased. The presence of humic acid resulted in increasing cadmium adsorption in a specific pH range. The order of reacting humic acid with cadmium was found to have a noticeable effect on the final adsorption capacity. The adsorption capacity of cadmium for humic acid that is adsorbed onto goethite-coated sand before reacting with a cadmium system, exceeds that of humic acid that is mixed with cadmium ions before goethite-coated sand is added.
    Relation: Water Research,Volume 36, Issue 20, Pages 4943-4950
    Appears in Collections:[環境工程與科學系] 期刊論文

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