Biosorption behavior of immobilized phanerochaete chrysosporium for heavy metals removal

Danlian Huang1,2, Guangming Zeng1,2, Piao Xu1,2, Meihua Zhao1,2, Cui Lai1,2, Ningjie Li1,2, Chao Huang1,2, Chen Zhang1,2, Min Cheng1,2

1 College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China
2 Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China

Abstract


Heavy metals are inorganic persistent pollutants with adverse health and environmental effects. In our study, self-synthesized iron oxide magnetic nanoparticles were encapsulated in the Phanerochaete chrysosporium (P. chrysosporium) hyphae. The prepared biosorbents possessed high efficiency for Pb(II) biosorption from single and binary metal systems. The maximum biosorption capacity was found to be 50.05 mg g 1 at pH 5.0. Environmental scanning electron microscope accompanied with energy disperse spectroscopy (ESEM-EDS) characterization showed Pb(II) ions were partially enriched via extracellular complexation and surface biosorption. MR analysis, defined as the ratio of heavy metals removed to H+ released, confirmed the ion-exchange, surface complexation and extracellular chelation behavior of the biosorbents. Moreover, distinct increase in the interior of Pb(II) contents in the immobilized P. chrysosporium suggested that iron oxide magnetic nanoparticles promoted biosorption process. The proposed immobilized biosorbents, showing high efficiency and strong feasibility, exhibited the potential application in Pb-containing industrial wastewater treatment.

Keywords


heavy metal; wastewater treatment; biosorption; immobilized Phanerochaete chrysosporium

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