Removal, Recovery, and Recycles of Gold (III) from Aqueous Gold (III) Solution Using Immobilized Pseudomonas saccharophila Cells by Biomineralization and Thiourea Oxidation

Volume 5, Issue 1, February 2021     |     PP. 1-16      |     PDF (322 K)    |     Pub. Date: May 22, 2021
DOI: 10.54647/geosciences17102    117 Downloads     5531 Views  

Author(s)

Takehiko Tsuruta, Department of Life and Environmental Science, Hachinohe Institute of Technology, Hachinohe, Japan; Department of Mechanical and Biochemical Engineering, Graduate School of Hachinohe Institute of Technology, Hachinohe, Japan
Yuki Odajima, Department of Life and Environmental Science, Hachinohe Institute of Technology, Hachinohe, Japan
Kato Marina, Department of Life and Environmental Science, Hachinohe Institute of Technology, Hachinohe, Japan
Ichiro Maeda, Department of Mechanical and Biochemical Engineering, Graduate School of Hachinohe Institute of Technology, Hachinohe, Japan

Abstract
Recently, some researchers have investigated the recovery of gold using microbial cells, such as bacteria, fungi, yeasts, and algae. However, there is little information on which kind of microorganisms has a high gold adsorbing ability. We have reported various species and strains of bacteria, actinomycetes, fungi, and yeasts were screened for their ability to adsorb gold from a solution containing hydrogen tetrachloroaurate (III). Hydrogen tetrachloroaurate (III) is used for medical and ceramic materials. The effect of pH, external gold concentration, cell amounts on gold biosorption, and the time course of gold biosorption by Pseudomonas maltophilia cells, which adsorbed large amounts of gold from a solution containing hydrogen tetrachloroaurate (III), were reported in detail. 　In this chapter, in order to approve the amount of gold recovery much higher, the removal of gold (III) by biosorption and biominaralization from aqueous systems using microbial cells, gold (III) removal by those using microbial cells was investigated.Additionally,the oxidative recovery of gold after reduced gold(0) by the oxidation using aqueous thiourea solution, and recycles of gold reduction-oxidation cycles.

Keywords
gold (III) biosorption, gold (0) biomineralization, microorganism, Peudomonas saccharophila, thiourea, recycles

Cite this paper
Takehiko Tsuruta, Yuki Odajima, Kato Marina, Ichiro Maeda, Removal, Recovery, and Recycles of Gold (III) from Aqueous Gold (III) Solution Using Immobilized Pseudomonas saccharophila Cells by Biomineralization and Thiourea Oxidation , SCIREA Journal of Geosciences. Volume 5, Issue 1, February 2021 | PP. 1-16. 10.54647/geosciences17102

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