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Copper removal from wastewater using spent-grain as biosorbent

Copper removal from wastewater using spent-grain as biosorbent,10.1016/j.biortech.2007.04.024,Bioresource Technology,Shuguang Lu,Stuart W. Gibb

Copper removal from wastewater using spent-grain as biosorbent   (Citations: 28)
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The removal of Cu(II) ions from aqueous solutions using spent-grain was studied. The experimental data fitted the Langmuir isotherm and the maximum adsorption capacity of spent-grain was determined to be 10.47mgg−1 dry weight (pH 4.2). Kinetic studies showed the adsorption process followed pseudo second-order rate model. Column studies with synthetic Cu(II) solutions were used to investigate the effects of Cu(II) ion concentration, initial pH, flow rate and the presence of EDTA on the Cu(II) removal performance. When treating the spent-lees, the wastewater from the whisky distilling industry, the reduction of Cu(II) uptake capacity to 77.7% (solution pH adjusted to 4.5 with 1N NaOH) and 31.6% (pH 3.8 without adjustment) was observed compared to Cu(II) uptake capacity when treating synthetic Cu(II) solution. On the basis of the results and that spent-grain is an abundant and by-product from the whisky distilling industry we suggest that it can be economically and effectively applied as a biosorbent for the removal of Cu(II) ions from distilling wastewaters.
Journal: Bioresource Technology - BIORESOURCE TECHNOL , vol. 99, no. 6, pp. 1509-1517, 2008
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    • ...This suggests that the rate-limiting step of this sorption system may be chemical sorption or chemisorption involving valency forces through sharing or exchange of electrons between adsorbent and adsorbate (Ho and McKay 1998; Lu and Gibb 2008)...

    Ali Almasiet al. Lead(II) and cadmium(II) removal from aqueous solution using processed...

    • ...This suggests that, the rate-limiting step of the sorption system can be chemisorption involving valances forces through sharing or exchange of electrons between adsorbent and adsorbate [19]...

    A. G. Devi Prasadet al. Biosorption Potential of Potato Peel Waste for the Removal of Nickel f...

    • ...There are only few studies and patents about removing copper ions from beverages, based on the formation of insoluble chelating agents or the use of chelating resins (Kogyo, 2002; Shuguang and Gibb, 2008)...
    • ...The treatment of distillery effluents having a non-negligible concentration of copper can be a serious environmental problem (Reaves and Berrow, 1984; Paton et al., 1995; Shuguang and Gibb, 2008)...
    • ...The potential of spent-grain, a barley by-product from whisky distilling process, was demonstrated for application in the remediation of coppercontaminated wastewater (Shuguang and Gibb, 2008)...

    J. V. Weberet al. Ethyl Carbamate in Foods and Beverages – A Review

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