title: High performance SiO2-nanoparticles-immobilized-Penicillium funiculosum for bioaccumulation and solid phase extraction of lead.
abstract: Novel biosorbent systems were designed, investigated and implemented for bioaccumulation of Pb(II) from aqueous solutions. These are based on the combination of SiO(2)-nanoparticles (N-Si) with Penicillium funiculosum fungus (Pen) for the formation of (N-Si-Pen) as well as heat inactivated Penicillium funiculosum (Pen). The SiO(2)-nanoparticles were also investigated as a solid sorbent phase. Surface characterization and immobilization were examined and confirmed by using FT-IR and SEM analysis. A batch equilibrium technique was used to follow-up the adsorption processes of lead under the effect of pH, contact time, sorbent dosage and initial metal concentration. The maximum capacity values were 1200.0 and 1266.7μmolg(-1) for (Pen) and (N-Si-Pen), respectively at pH 5. Sorption equilibria were established in ∼20min and their data were well described by Langmuir, Freundlich and Dubinin-Radushkevich models. The potential applications of these biosorbents for extraction of Pb(II) from real samples contaminated with lead, were successfully accomplished.
authors.affiliation: Faculty of Science, Chemistry Department, Alexandria University, P.O. Box 426, Alexandria 21321, Egypt. memahmoud10@yahoo.com
authors.forename: Mohamed E
authors.initials: ME
authors.lastname: Mahmoud
authors.forename: Amr A
authors.initials: AA
authors.lastname: Yakout
authors.forename: Hany
authors.initials: H
authors.lastname: Abdel-Aal
authors.forename: Maher M
authors.initials: MM
authors.lastname: Osman
mesh_terms: D000327:Adsorption; D001673:Biodegradation, Environmental; D002021:Buffers; D018914:Cells, Immobilized / Q000166:cytology / Q000378:metabolism; D006863:Hydrogen-Ion Concentration; D007477:Ions; D007700:Kinetics; D007854:Lead / Q000302:isolation & purification* / Q000378:metabolism*; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D010407:Penicillium / Q000166:cytology / Q000378:metabolism*; D012822:Silicon Dioxide / Q000737:chemistry*; D052616:Solid Phase Extraction / Q000379:methods*; D013499:Surface Properties; D013696:Temperature; D013997:Time Factors
chemical_list: D002021:Buffers; D007477:Ions; D007854:Lead; D012822:Silicon Dioxide