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Adsorption of Pb(II), Cu(II), Cd(II), Zn(II), Ni(II), Fe(II), and As(V) on bacterially produced metal sulfides

Jong, Tony J and Parry, David L. (2004). Adsorption of Pb(II), Cu(II), Cd(II), Zn(II), Ni(II), Fe(II), and As(V) on bacterially produced metal sulfides. Journal of Colloid and Interface Science,275(1):61-71.

Document type: Journal Article
Citation counts: Scopus Citation Count Cited 27 times in Scopus Article | Citations

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Title Adsorption of Pb(II), Cu(II), Cd(II), Zn(II), Ni(II), Fe(II), and As(V) on bacterially produced metal sulfides
Author Jong, Tony J
Parry, David L.
Journal Name Journal of Colloid and Interface Science
Publication Date 2004
Volume Number 275
Issue Number 1
ISSN 1095-7103   (check CDU catalogue open catalogue search in new window)
Scopus ID 2-s2.0-2442714828
Start Page 61
End Page 71
Total Pages 11
Place of Publication San Diego
Publisher Elsevier
Field of Research 0306 - Physical Chemistry (incl. Structural)
0904 - Chemical Engineering
0914 - Resources Engineering and Extractive Metallurgy
HERDC Category C1 - Journal Article (DEST)
Abstract The adsorption of Pb(II), Cu(II), Cd(II), Zn(II), Ni(II), Fe(II) and As(V) onto bacterially produced metal sulfide (BPMS) material was investigated using a batch equilibrium method. It was found that the sulfide material had adsorptive properties comparable with those of other adsorbents with respect to the specific uptake of a range of metals and, the levels to which dissolved metal concentrations in solution can be reduced. The percentage of adsorption increased with increasing pH and adsorbent dose, but decreased with increasing initial dissolved metal concentration. The pH of the solution was the most important parameter controlling adsorption of Cd(II), Cu(II), Fe(II), Ni(II), Pb(II), Zn(II), and As(V) by BPMS. The adsorption data were successfully modeled using the Langmuir adsorption isotherm. Desorption experiments showed that the reversibility of adsorption was low, suggesting high-affinity adsorption governed by chemisorption. The mechanism of adsorption for the divalent metals was thought to be the formation of strong, inner-sphere complexes involving surface hydroxyl groups. However, the mechanism for the adsorption of As(V) by BPMS appears to be distinct from that of surface hydroxyl exchange. These results have important implications to the management of metal sulfide sludge produced by bacterial sulfate reduction.
DOI http://dx.doi.org/10.1016/j.jcis.2004.01.046   (check subscription with CDU E-Gateway service for CDU Staff and Students  check subscription with CDU E-Gateway in new window)
 
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