Adsorption of Cu(II) from Aqueous Solution by Wine Processing Waste Sludge

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Abstract:

Wine processing waste sludge (WPWS) has been shown to be an effective sorbent for sorption of nickel, lead, and chromium, but the sorption of copper (Cu) in aqueous solution by WPWS has not been conducted. The objective of this study was to explore the sorption mechanism of WPWS for copper. Infrared analysis revealed carboxyl was the major functional group in WPWS. The WPWS sorption isotherms of copper were only well described by Langmuir sorption isotherm. The maximum adsorption capacity (Qm) was 14.26 mg/g at 50 °C. A pseudo-second-order sorption kinetic model successfully described the kinetics of copper sorption onto WPWS. The Gibb free energies (ΔG°) ranged from −20.69 to −24.29 kJ mol-1, and the ΔH° and ΔS° were 5.048 kJ mol-1 and 91.05 J mol-1 K-1, respectively. The trend of the intra-particular diffusion rate is the opposite of the adsorption constant of the pseudo-second-order equation.

Keywords: activation energy; copper; intra-particle diffusion; sludge; sorption

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/106143012X13373550427156

Affiliations: 1: Department of Environmental Engineering, National Ilan University, Ilan, Taiwan, 260 2: Department of Agricultural Chemistry, National Taiwan University, Taipei, Taiwan, 106 3: Department of Animal Science, National Ilan University, Ilan, Taiwan, 260

Publication date: September 1, 2012

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  • Water Environment Research® (WER®) publishes peer-reviewed research papers, research notes, state-of-the-art and critical reviews on original, fundamental and applied research in all scientific and technical areas related to water quality, pollution control, and management. An annual Literature Review provides a review of published books and articles on water quality topics from the previous year.

    Published as: Sewage Works Journal, 1928 - 1949; Sewage and Industrial Wastes, 1950 - 1959; Journal Water Pollution Control Federation, 1959 - Oct 1989; Research Journal Water Pollution Control Federation, Nov 1989 - 1991; Water Environment Research, 1992 - present.
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