Leaching behavior and chemical stability of copper butyl xanthate complex under acidic conditions

Yi Kuo Chang, Juu-En Chang, Li Choung Chiang

Research output: Contribution to journalArticle

12 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)1089-1094
Number of pages6
JournalChemosphere
Volume52
Issue number6
DOIs
Publication statusPublished - 2003 Jan 1

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Chemical stability
Leaching
Copper
leaching
copper
Toxicity
Precipitates
Photoelectron Spectroscopy
toxicity
X-ray spectroscopy
butylxanthate
chemical
X ray photoelectron spectroscopy
Infrared Rays
Fourier Analysis
Waste Water
Acetic acid
Acetic Acid
acetic acid
Fourier transform

All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Chemistry(all)

Cite this

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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.",
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Leaching behavior and chemical stability of copper butyl xanthate complex under acidic conditions. / Chang, Yi Kuo; Chang, Juu-En; Chiang, Li Choung.

In: Chemosphere, Vol. 52, No. 6, 01.01.2003, p. 1089-1094.

Research output: Contribution to journalArticle

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