TY - JOUR T1 - A novel technology for biosorption and recovery hexavalent chromium in wastewater by bio-functional magnetic beads. AU - Li,Huidong, AU - Li,Zhao, AU - Liu,Ting, AU - Xiao,Xiao, AU - Peng,Zhihui, AU - Deng,Le, Y1 - 2008/01/24/ PY - 2007/09/16/received PY - 2007/11/26/revised PY - 2007/12/01/accepted PY - 2008/1/29/pubmed PY - 2008/8/21/medline PY - 2008/1/29/entrez SP - 6271 EP - 9 JF - Bioresource technology JO - Bioresour Technol VL - 99 IS - 14 N2 - The goal of this study was to develop an applied technique for the removal and recovery of heavy metal in wastewater. It is novel that the Cr(VI) could be adsorbed and recovered by bio-functional magnetic beads. Furthermore, the magnetic separation technology would make their separation more convenient. The beads were constituted by the powder of Rhizopus cohnii and Fe(3)O(4) particles coated with alginate and polyvinyl alcohol (PVA). The parameters effecting Cr(VI) removal were obtained: the optimum pH 1.0 and optimum temperature 28 degrees C. The biosorption took place mainly in form of Cr(VI) and R. cohnii biomass played a key role in Cr(VI) adsorption. The model of Langmuir isotherm and Lagergren could be better used to fit the sorption process and kinetics, respectively. The beads still maintained predominant characteristics of adsorption, recovery and magnetism after five cycles for adsorption-desorption. The mechanism of adsorption was gained by Fourier transform infrared spectroscopy (FTIR), raman spectroscopy (RS) and scanning electron microscopy (SEM). The groups of -NH(3)(+), -NH(2)(+)-, and NH- played an important role in the Cr(VI) adsorption. Consequently, the beads exhibited the superior performances in Cr(VI) cleanup, separation and recovery and the perspective potential in application. SN - 0960-8524 UR - https://www.unboundmedicine.com/medline/citation/18221868/A_novel_technology_for_biosorption_and_recovery_hexavalent_chromium_in_wastewater_by_bio_functional_magnetic_beads_ DB - PRIME DP - Unbound Medicine ER -