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|Title:||Biosorption of gold by immobilized fungal biomass|
|Citation:||Khoo, K.-M., Ting, Y.-P. (2001). Biosorption of gold by immobilized fungal biomass. Biochemical Engineering Journal 8 (1) : 51-59. ScholarBank@NUS Repository. https://doi.org/10.1016/S1369-703X(00)00134-0|
|Abstract:||The characteristics of polyvinyl alcohol (PVA) and calcium alginate as immobilization matrices were examined and compared for the uptake of gold by a fungal biomass. PVA-immobilized biomass showed superior mechanical strength and chemical stability. In addition, PVA beads were also stable under a wider range of pH (1-13). The lower mass transfer resistance in PVA beads was evident from kinetic studies which showed a significantly shorter period of time for the immobilized PVA beads to achieve 80% gold removal as compared with immobilized alginate beads. Calculated rate constants and maximum rates for the uptake of gold by both immobilized PVA and immobilized alginate biosorbent revealed a much more rapid uptake phenomenon by the former. BET analyses also indicated a larger surface area and larger pore size distribution in PVA beads, further indicating a lower resistance to mass transfer. Gold biosorption in the immobilized PVA bead could be modeled by both the Langmuir and Freundlich adsorption isotherms. © 2001 Elsevier Science B.V.|
|Source Title:||Biochemical Engineering Journal|
|Appears in Collections:||Staff Publications|
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