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    Please use this identifier to cite or link to this item: https://ir.fy.edu.tw:8080/ir/handle/987654321/10036


    Title: Leaching behavior and chemical stability of copper butyl xanthate complex under acidic conditions
    Authors: Chang,Yi-Kuo;Chang, Juu-En;Chiang, Li-Choung
    Contributors: 輔英科技大學 環境工程與科學系
    Keywords: Leaching;Stability;Copper xanthate complex;Semi-dynamic leaching test
    Date: 2003-08
    Issue Date: 2010-11-16 17:38:07 (UTC+8)
    Abstract: Although xanthate addition can be used for treating copper-containing wastewater, a better understanding of the leaching toxicity and the stability characteristics of the copper xanthate complexes formed is essential. This work was undertaken to evaluate the leaching behavior of copper xanthate complex precipitates by means of toxicity characteristics leaching procedure (TCLP) and semi-dynamic leaching test (SDLT) using 1 N acetic acid solution as the leachant. Also, the chemical stability of the copper xanthate complex during extraction has been examined with the studying of variation of chemical structure using UV-vis, Fourier transform infrared and X-ray photoelectron spectroscopies (XPS).Both TCLP and SDLT results showed that a negligible amount of copper ion was leached out from the copper xanthate complex precipitate, indicating that the complex exhibited a high degree of copper leaching stability under acidic conditions. Nevertheless, chemical structure of the copper xanthate complex precipitate varied during the leaching tests. XPS data suggested that the copper xanthate complex initially contained both cupric and cuprous xanthate, but the unstable cupric xanthate change to the cuprous form after acid extraction, indicating the cuprous xanthate to be the final stabilizing structure. Despite that, the changes of chemical structure did not induce the rapid leaching of copper from the copper xanthate complex.
    Relation: Chemosphere,Volume 52, Issue 6, Pages 1089-1094
    Appears in Collections:[環境工程與科學系] 期刊論文

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