Some researchers have recently looked into gold recovery using microbial cells like bacteria, fungi, yeasts, and algae. However, nothing is known about which microbes have a high gold adsorption capacity. Various bacteria, actinomycetes, fungus, and yeast species and strains were tested for their capacity to adsorb gold from a solution containing hydrogen tetrachloroaurate (III). Medical and ceramic materials contain hydrogen tetrachloroaurate (III). The influence of pH, external gold concentration, cell numbers on gold biosorption, and the time course of gold biosorption by Pseudomonas maltophilia cells, which adsorbed substantial amounts of gold from a solution containing hydrogen tetrachloroaurate (III), were all thoroughly investigated. The removal of gold (III) by biosorption and biomineralization from aqueous systems employing microbial cells, gold (III) removal by those using microbial cells, was explored in this chapter in order to approve a much larger amount of gold recovery. The oxidative recovery of gold following reduced gold(0) by oxidation with aqueous thiourea solution, as well as gold reduction-oxidation cycle recycling.
Author (s) Details
Takehiko Tsuruta
Department of Life and Environmental Science, Hachinohe Institute of Technology, Hachinohe, Japan.
View Book :- https://stm.bookpi.org/CACB-V9/article/view/2195
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