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Solubilization and bioprecipitation of zinc oxide nanoparticles by fungi isolated from zinc sulfide mineral ores

TitleSolubilization and bioprecipitation of zinc oxide nanoparticles by fungi isolated from zinc sulfide mineral ores
Publication TypeJournal Article
Year of Publication2560
Authorsธนวัช สุจริตวรกุล
JournalMaterials Today: Proceedings
Volume4
Issue5 Part 2
Pagination6562-6566
Date PublishedAugust 2017
Type of Articleบทความวิจัย
ISSN2214-7853
KeywordsBioprecipitation, Fungi, Solubilization, Zinc oxide nanoparticles
Abstract

Zinc oxide (ZnO) is an insoluble form, which often means less bioavailable to the organisms. Seven fungal isolates were isolated from zinc sulfide mineral ores (sphalerite) and obtained from Padaeng Industry in Tak province, Thailand. They were examined for the ability to solubilize and precipitate zinc oxide nanoparticles. Fungal isolates were grown on potato dextrose agar (PDA) medium supplemented with 0.5% (w/v) zinc oxide nanoparticles. Among tested fungal strains, Aspergillus niger showed the highest efficiency for solubilizing zinc oxide nanoparticles. Biomineral crystals were observed in zinc oxide nanoparticles-containing agar medium underneath colonies of Aspergillus niger. Scanning electron microscope (SEM) equipped with energy dispersive X-ray spectrometer (EDS) and X-ray powder diffraction (XRPD) studies revealed that the biomineral crystals are zinc oxalate hydrate (C2O2Zn•2H2O). It would be suggested that this fungal strain has potential biotechnological application in agricultural practice and heavy metal bioremediation.

URLhttps://www.sciencedirect.com/science/article/pii/S2214785317309628
DOI10.1016/j.matpr.2017.06.168