title: Cadmium removal from simulated wastewater to biomass byproduct of Lentinus edodes.
abstract: A kind of agricultural waste, the byproduct of brown-rot fungus Lentinus edodes, was used as an efficient biosorbent for the removal of cadmium from water in this paper. The sorption conditions, such as pH, the dose of biomass and the initial concentration of cadmium were examined. Three kinds of adsorption models were applied to simulate the biosorption data. Uptake of cadmium was higher in weak acid condition than in strong acid condition. Nearly no sorption of cadmium occurred when the pH value was lower than 2.5. Biosorption isothermal data could be well simulated by Freundlich model, and then Langmuir and Temkin model. Langmuir simulation of the biosorption showed that the maximum uptake of cadmium was 5.58mmol/g in weak acid condition, which was much higher than many other biosorbents. The exchanged proton was highly related to the uptake of cadmium in weak acid condition. Fourier transform infrared spectrums and energy-dispersive X-ray microanalyzer were used to reveal ion-exchange mechanism between cadmium and the functional groups or participated inorganic metal ions during biosorption.
authors.affiliation: College of Environmental Science and Engineering, Hunan University, Changsha 410082, China.
authors.forename: Guiqiu
authors.initials: G
authors.lastname: Chen
authors.forename: Guangming
authors.initials: G
authors.lastname: Zeng
authors.forename: Lin
authors.initials: L
authors.lastname: Tang
authors.forename: Chunyan
authors.initials: C
authors.lastname: Du
authors.forename: Xiaoyun
authors.initials: X
authors.lastname: Jiang
authors.forename: Guohe
authors.initials: G
authors.lastname: Huang
authors.forename: Hongliang
authors.initials: H
authors.lastname: Liu
authors.forename: Guoli
authors.initials: G
authors.lastname: Shen
mesh_terms: D018533:Biomass; D002104:Cadmium / Q000302:isolation & purification*; D006863:Hydrogen-Ion Concentration; D020942:Shiitake Mushrooms / Q000378:metabolism*; D017550:Spectroscopy, Fourier Transform Infrared; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D014965:X-Rays
chemical_list: D014874:Water Pollutants, Chemical; D002104:Cadmium