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    Biosorption of copper, nickel and cobalt ions from dilute solutions using BSA-coated air bubbles

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    Authors
    Nazari, Amir Mohammad
    Cox, Phil
    Waters, Kristian E.
    Issue Date
    2014-09-29
    
    Metadata
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    Abstract
    This study probed the competitive biosorption behavior of a ternary system containing copper, nickel and cobalt ions using a novel material known as air-filled emulsion (AFE). AFE is a stable colloidal suspension in which fine protein-coated bubbles (<10 μm) generated by an ultrasonic technique are dispersed through the aqueous solution, introducing a high surface area between protein as an extractant and metal ions. Effect of different experimental conditions including metal solution pH, temperature, biomass dosage and metal ion concentration on metal ion uptake was investigated. It was observed that an increase in pH led to greater metal uptake; although, bovine serum albumin (BSA)-coated bubbles illustrated higher affinity for copper ions than for nickel and cobalt ions. Increasing the temperature up to 65 °C increased copper uptake to roughly 98%; however nickel and cobalt removal did not exhibit a significant change. BSAEM also demonstrated very different adsorption behaviors for copper, nickel and cobalt at various biomass and metal ion concentrations. Fourier transform infrared (FTIR) and X-ray photoelectron spectroscopy (XPS) results revealed that amino, carboxylic and thiol groups of BSA-coated microcells are the active sorbing sites for metal ion uptake in the solution.
    Citation
    Biosorption of copper, nickel and cobalt ions from dilute solutions using BSA-coated air bubbles 2014, 3:10 Journal of Water Process Engineering
    Publisher
    Elsevier
    Journal
    Journal of Water Process Engineering
    URI
    http://hdl.handle.net/2436/620506
    DOI
    10.1016/j.jwpe.2014.07.001
    Additional Links
    http://linkinghub.elsevier.com/retrieve/pii/S2214714414000695
    Type
    Journal article
    Language
    en
    ISSN
    2214-7144
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.jwpe.2014.07.001
    Scopus Count
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    Faculty of Science and Engineering

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