title: Biosorption of cadmium by a metal-resistant filamentous fungus isolated from chicken manure compost.
abstract: A fungus, XJ-1, isolated from chicken manure compost was phylogenetically related to Penicillium chrysogenum. The minimum inhibitory concentrations of the fungus for Cd2+, Cu2+, Cr3+, Cr6+, Co2+ and Zn2+ were 300, 85, 55, 8, 25 and 70mM on plates and 200, 65, 30, 2, 30 and 48mM in liquid media, respectively. Biosorption of Cd2+ by XJ-1 was investigated as a function of initial pH, contact time, biomass loading and Cd+ concentration. According to the Langmuir isotherm, the maximum adsorption of Cd2+ was 100.41 mg g(-1) dry biomass. Analyses using FTIR, SEM and XPS showed that the functional groups -OH and -C=O on the XJ-1 cell wall are the dominant binding sites for Cd2+. The results indicate that XJ-1 biomass is an efficient biosorbent for Cd2+ and has great potential for the in situ remediation of environments contaminated with heavy metals.
authors.affiliation: State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China.
authors.forename: Xingjian
authors.initials: X
authors.lastname: Xu
authors.forename: Lu
authors.initials: L
authors.lastname: Xia
authors.forename: Qiaoyun
authors.initials: Q
authors.lastname: Huang
authors.forename: Ji-Dong
authors.initials: JD
authors.lastname: Gu
authors.forename: Wenli
authors.initials: W
authors.lastname: Chen
mesh_terms: D000818:Animals; D001673:Biodegradation, Environmental; D018533:Biomass; D002104:Cadmium / Q000493:pharmacokinetics* / Q000494:pharmacology; D002645:Chickens; D005658:Fungi / Q000187:drug effects / Q000302:isolation & purification* / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D008372:Manure / Q000382:microbiology*; D008826:Microbial Sensitivity Tests; D008855:Microscopy, Electron, Scanning; D010408:Penicillium chrysogenum; D056951:Photoelectron Spectroscopy; D010802:Phylogeny; D012987:Soil; D012988:Soil Microbiology; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D008372:Manure; D012987:Soil; D002104:Cadmium