title: Removal of zinc by live, dead, and dried biomass of Fusarium spp. isolated from the abandoned-metal mine in South Korea and its perspective of producing nanocrystals.
abstract: Bioremediation is an innovative and alternative technology to remove heavy metal pollutants from aqueous solution using biomass from various microorganisms like algae, fungi and bacteria. In this study biosorption of zinc onto live, dead and dried biomass of Fusarium spp. was investigated as a function of initial zinc(II) concentration, pH, temperature, agitation and inoculum volume. It was observed that dried, dead and live biomass efficiently removed zinc at 60 min at an initial pH of 6.0+/-0.3. Temperature of 40 degrees C was optimum at agitation speed of 150 or 200 rpm. The initial metal concentration (10-320 mg L(-1)) significantly influenced the biosorption of the fungi. Overall, biosorption was high with 30-60% by dried, live and dead biomass. In addition to this, the potential of Fusarium spp. to produce zinc nanocrystals was determined by transmission electron microscopy, energy-dispersive spectroscopy, X-ray diffraction and fourier transform infrared spectroscopy, which showed that dead biomass was not significantly involved in production of zinc nanocrystals.
authors.affiliation: Division of Biotechnology, Advanced institute of Environment and Bioscience, College of Environmental and Bioresource Sciences, Chonbuk National University, Iksan, Jeonbuk 570-752, South Korea.
authors.forename: Palanivel
authors.initials: P
authors.lastname: Velmurugan
authors.forename: Jaehong
authors.initials: J
authors.lastname: Shim
authors.forename: Youngnam
authors.initials: Y
authors.lastname: You
authors.forename: Songho
authors.initials: S
authors.lastname: Choi
authors.forename: Seralathan
authors.initials: S
authors.lastname: Kamala-Kannan
authors.forename: Kui-Jae
authors.initials: KJ
authors.lastname: Lee
authors.forename: Hee Joung
authors.initials: HJ
authors.lastname: Kim
authors.forename: Byung-Taek
authors.initials: BT
authors.lastname: Oh
mesh_terms: D018533:Biomass; D005670:Fusarium / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D008670:Metals; D046529:Microscopy, Electron, Transmission; D008906:Mining; D053758:Nanoparticles; D056910:Republic of Korea; D013696:Temperature; D015032:Zinc / Q000302:isolation & purification*
chemical_list: D008670:Metals; D015032:Zinc