High performance SiO2-nanoparticles-immobilized-Penicillium funiculosum for bioaccumulation and solid phase extraction of lead

作者：Mahmoud Mohamed E^*; Yakout Amr A; Abdel Aal Hany; Osman Maher M

来源：Bioresource Technology, 2012, 106: 125-132.

DOI：10.1016/j.biortech.2011.11.081

• Biosortpion
• SiO2-nanoparticles
• Lead
• Penicillium funiculosum
• Immobilized fungal cells

Novel biosorbent systems were designed, investigated and implemented for bioaccumulation of Pb(II) from aqueous solutions. These are based on the combination of SiO2-nanoparticles (N-Si) with Penicillium funiculosum fungus (Pen) for the formation of (N-Si-Pen) as well as heat inactivated Penicillium funiculosum (Pen). The SiO2-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 1266.7 mu mol g(-1) for (Pen) and (N-Si-Pen), respectively at pH 5. Sorption equilibria were established in similar to 20 min 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.

• 出版日期2012-2