TY - JOUR
T1 - Possible mechanism of gallium bioleaching from gallium nitride (GAN) by Arthrobacter creatinolyticus
T2 - Role of amino acids/peptides/proteins bindings with gallium
AU - Maneesuwannarat, Sirikan
AU - Teamkao, Pattrarat
AU - Vangnai, Alisa S.
AU - Yamashita, Mitsuo
AU - Thiravetyan, Paitip
N1 - Funding Information:
The authors would like to thank the Higher Education Research Promotion and National Research University Project of Thailand, Office of the Higher Education Commission for their financial support.
Publisher Copyright:
© 2016 Institution of Chemical Engineers
Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2016/9/1
Y1 - 2016/9/1
N2 - The objectives of this work were to screen and characterize heterotrophic bacteria for gallium nitride (GaN) leaching; and to study the involved mechanism of bacterial leaching of Ga from GaN. Ga in the form of GaN has been extensively used as a semiconductor substrate material. The advantage of bioleaching for gallium recovery is the fact that it is a safer, environmentally-friendly method and includes energy-saving processes, which can leach metals at relatively low concentrations. Three bacterial isolates were isolated from cadmium-, and arsenic-contaminated soil in the presence of GaN. NKS4 showed the highest efficiency in Ga leaching at approximately 18% after 15 days, and the system pH was 9. The analysis of 16S rDNA sequences indicated that strain NKS4 was characterized and identified as Arthrobacter creatinolyticus (A. creatinolyticus). Further investigation revealed that the ability of Ga leaching from GaN by this bacterium involved amino acids. Fourier transform infrared spectroscopy (FTIR) was used to investigate the interaction of Ga and amino acids/peptides/proteins which were secreted from this bacteria.
AB - The objectives of this work were to screen and characterize heterotrophic bacteria for gallium nitride (GaN) leaching; and to study the involved mechanism of bacterial leaching of Ga from GaN. Ga in the form of GaN has been extensively used as a semiconductor substrate material. The advantage of bioleaching for gallium recovery is the fact that it is a safer, environmentally-friendly method and includes energy-saving processes, which can leach metals at relatively low concentrations. Three bacterial isolates were isolated from cadmium-, and arsenic-contaminated soil in the presence of GaN. NKS4 showed the highest efficiency in Ga leaching at approximately 18% after 15 days, and the system pH was 9. The analysis of 16S rDNA sequences indicated that strain NKS4 was characterized and identified as Arthrobacter creatinolyticus (A. creatinolyticus). Further investigation revealed that the ability of Ga leaching from GaN by this bacterium involved amino acids. Fourier transform infrared spectroscopy (FTIR) was used to investigate the interaction of Ga and amino acids/peptides/proteins which were secreted from this bacteria.
KW - Arthrobacter creatinolyticus
KW - Bioleaching
KW - Electronic waste
KW - Gallium nitride
KW - Semiconductor
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U2 - 10.1016/j.psep.2016.06.036
DO - 10.1016/j.psep.2016.06.036
M3 - Article
AN - SCOPUS:84979025584
VL - 103
SP - 36
EP - 45
JO - Process Safety and Environmental Protection
JF - Process Safety and Environmental Protection
SN - 0957-5820
ER -