title: [Extracellular polymeric substances (EPS) of white-rot fungus and their effects on Pb2+ adsorption by biomass].
abstract: The extracellular polymeric substances (EPS) of P. chrysosporium and their effects on Pb2+ biosorption were studied. The product, composition of EPS and the effects on Pb2+ biosorption capacity were investigated in lab via flask experiments. The surface changes of mycelium before and after EPS extraction, before and after Pb2+ adsorption were researched by environment scanning electron microscope with energy-dispersive X-ray analysis (ESEM-EDX). Results showed that at 113 h, the maximum yield of EPS was 125.5 mg/L, which contained 46.6% - 54.3% of sugar and 31.2% - 35.1% of protein. The results of control test after EPS extraction displayed a decrease of biosorption capacity of Pb2+ among 2.12 mg/g (113 h) - 7.73 mg/g (41 h). The results of environment scanning electron microscope (ESEM) showed that the EPS extraction affected the cell wall of white-rot fungus and the Pb-contained globular particle after Pb2+ uptake, which was very useful for further study on heavy metal biosorption mechanism.
authors.affiliation: College of Environmental Science and Engineering, Hunan University, Changsha 410082, China. wangliang312@126.com
authors.forename: Liang
authors.initials: L
authors.lastname: Wang
authors.forename: Gui-Qiu
authors.initials: GQ
authors.lastname: Chen
authors.forename: Guang-Ming
authors.initials: GM
authors.lastname: Zeng
authors.forename: Wen-Juan
authors.initials: WJ
authors.lastname: Zhang
authors.forename: Jia-Qi
authors.initials: JQ
authors.lastname: Fan
authors.forename: Guo-Li
authors.initials: GL
authors.lastname: Shen
mesh_terms: D000327:Adsorption; D001487:Basidiomycota / Q000378:metabolism*; D001673:Biodegradation, Environmental; D001704:Biopolymers / Q000378:metabolism*; D005109:Extracellular Matrix / Q000378:metabolism; D007854:Lead / Q000302:isolation & purification* / Q000378:metabolism; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification* / Q000378:metabolism
chemical_list: D001704:Biopolymers; D014874:Water Pollutants, Chemical; D007854:Lead