Next Article in Journal
The Origin and Evolution of Ore-Bearing Rocks in the Loypishnun Deposit (Monchetundra Massif, NE Fennoscandian Shield): Isotope Nd-Sr and REE Geochemical Data
Previous Article in Journal
Li and Ca Enrichment in the Bristol Dry Lake Brine Compared to Brines from Cadiz and Danby Dry Lakes, Barstow-Bristol Trough, California, USA
Previous Article in Special Issue
Recovery of Copper from Leached Tailing Solutions by Biosorption
Open AccessArticle

Microbial Gold Biosortion and Biomineralization from Aqueous HAuCl4 Solution

Department of Life and Environmental Science, Faculty of Engineering, Hachinohe Institute of Technology, 88-1 Ohbiraki, Myoh, Hachinohe 031-8501, Japan
*
Author to whom correspondence should be addressed.
Minerals 2020, 10(3), 285; https://doi.org/10.3390/min10030285
Received: 17 February 2020 / Revised: 12 March 2020 / Accepted: 19 March 2020 / Published: 21 March 2020
(This article belongs to the Special Issue Biosorption and Biomineralization in Metal Removal)
The removal of gold (III) from aqueous systems using biosorption and biomineralization by microbial cells was investigated. High levels of gold (III) were removed from a hydrogen tetrachloroaurate (III) solution for 72 h by microbial species, including bacteria, fungi and yeasts. Previously, we reported that the amounts of gold (III) removed through biosorption by gram-positive bacteria, fungi, and yeasts was lower than that by gram-negative bacteria. Candida krusei was able to remove large amounts of gold (III) through biosorption and biomineralization. Interestingly, more gold was removed by atomic reduction than by biosorption. Additionally, we examined time, pH, concentration and other factors affecting gold removal. The rate of gold (III) removal by C. krusei increased for 6 h, and then stabilized, however, the rate of removal increased after 22 h, and reached a second equilibrium after 68 h. View Full-Text
Keywords: gold (III) biosorption; gold (0) biomineralization; microorganism; Candida krusei gold (III) biosorption; gold (0) biomineralization; microorganism; Candida krusei
Show Figures

Figure 1

MDPI and ACS Style

Maeda, I.; Tsuruta, T. Microbial Gold Biosortion and Biomineralization from Aqueous HAuCl4 Solution. Minerals 2020, 10, 285.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop