TY - JOUR
T1 - Microbe-mediated sustainable bio-recovery of gold from low-grade precious solid waste
T2 - A microbiological overview
AU - Rana, Supriyanka
AU - Mishra, Puranjan
AU - Wahid, Zularisam ab
AU - Thakur, Sveta
AU - Pant, Deepak
AU - Singh, Lakhveer
N1 - Funding Information:
This work was supported by the University Malaysia Pahang, Malaysia. The authors are grateful for the financial support provided by university under Research Grant No. RDU190332 and Ministry of Education of Malaysia under the research Grant of RDU190121.
Publisher Copyright:
© 2019 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences.
PY - 2020/3
Y1 - 2020/3
N2 - In an era of electronics, recovering the precious metal such as gold from ever increasing piles of electronic-wastes and metal-ion infested soil has become one of the prime concerns for researchers worldwide. Biological mining is an attractive, economical and non-hazardous to recover gold from the low-grade auriferous ore containing waste or soil. This review represents the recent major biological gold retrieval methods used to bio-mine gold. The biomining methods discussed in this review include, bioleaching, bio-oxidation, bio-precipitation, bio-flotation, bio-flocculation, bio-sorption, bio-reduction, bio-electrometallurgical technologies and bioaccumulation. The mechanism of gold biorecovery by microbes is explained in detail to explore its intracellular mechanistic, which help it withstand high concentrations of gold without causing any fatal consequences. Major challenges and future opportunities associated with each method and how they will dictate the fate of gold bio-metallurgy from metal wastes or metal infested soil bioremediation in the coming future are also discussed. With the help of concurrent advancements in high-throughput technologies, the gold bio-exploratory methods will speed up our ways to ensure maximum gold retrieval out of such low-grade ores containing sources, while keeping the gold mining clean and more sustainable.
AB - In an era of electronics, recovering the precious metal such as gold from ever increasing piles of electronic-wastes and metal-ion infested soil has become one of the prime concerns for researchers worldwide. Biological mining is an attractive, economical and non-hazardous to recover gold from the low-grade auriferous ore containing waste or soil. This review represents the recent major biological gold retrieval methods used to bio-mine gold. The biomining methods discussed in this review include, bioleaching, bio-oxidation, bio-precipitation, bio-flotation, bio-flocculation, bio-sorption, bio-reduction, bio-electrometallurgical technologies and bioaccumulation. The mechanism of gold biorecovery by microbes is explained in detail to explore its intracellular mechanistic, which help it withstand high concentrations of gold without causing any fatal consequences. Major challenges and future opportunities associated with each method and how they will dictate the fate of gold bio-metallurgy from metal wastes or metal infested soil bioremediation in the coming future are also discussed. With the help of concurrent advancements in high-throughput technologies, the gold bio-exploratory methods will speed up our ways to ensure maximum gold retrieval out of such low-grade ores containing sources, while keeping the gold mining clean and more sustainable.
KW - Gold
KW - Critical metals
KW - Bio-recovery
KW - Biomining
KW - Gold harvesting microbes
UR - http://www.scopus.com/inward/record.url?scp=85075512747&partnerID=8YFLogxK
U2 - 10.1016/j.jes.2019.09.023
DO - 10.1016/j.jes.2019.09.023
M3 - Journal article
C2 - 31892401
SN - 1001-0742
VL - 89
SP - 47
EP - 64
JO - Journal of Environmental Sciences (China)
JF - Journal of Environmental Sciences (China)
ER -
