期刊
BIORESOURCE TECHNOLOGY
卷 211, 期 -, 页码 759-764出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2016.01.061
关键词
Metal recovery; Red algae; Gold; Palladium; Biosorption
资金
- PRESTO from the Japan Science and Technology Agency
- Tokuyama Science Foundation
- Promoting University-Industry Cooperation from the University of Tsukuba
- Japan Society for the Promotion of Science [24550112]
- Grants-in-Aid for Scientific Research [24550112, 15K14587] Funding Source: KAKEN
The demand for precious metals has increased in recent years. However, low concentrations of precious metals dissolved in wastewater are yet to be recovered because of high operation costs and technical problems. The unicellular red alga, Galdieria sulphuraria, efficiently absorbs precious metals through biosorption. In this study, over 90% of gold and palladium could be selectively recovered from aqua regia-based metal wastewater by using G. sulphuraria. These metals were eluted from the cells into ammonium solutions containing 0.2 M ammonium salts without other contaminating metals. The use of G. sulphuraria is an eco-friendly and cost-effective way of recovering low concentrations of gold and palladium discarded in metal wastewater. (C) 2016 The Authors. Published by Elsevier Ltd.
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