title: Effective removal of cadmium ions from a simulated gastrointestinal fluid by Lentinus edodes.
abstract: Lentinus edodes, a functional food, was evaluated as a potential antidote for adsorption/removal of cadmium ion from simulated gastrointestinal fluids. An adsorption/removal capacity of 65.12 mg/g was achieved by L. edodes in solutions with a pH ranging from 2.5 to 6.0, while little if any adsorption was observed in solutions with a pH under 2.5. In solutions with pH 6.0, 84% of the cadmium adsorption by L. edodes occurred in the first minute. Scanning electronic microscopic examination showed that the cell wall polysaccharides of L. edodes provided a rough sponge-like surface for effective cadmium adsorption. FTIR indicated that the carboxyl, hydroxyl and -NH groups of the cell wall polysaccharides and proteins were the primary functional groups that chemically bind with cadmium ions. The energy dispersive spectrometry further revealed that cation exchange might be attributed to cadmium biosorption. These results suggested that L. edodes was effective for cadmium detoxication, especially in low concentration.
authors.affiliation: College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China. bianyb.123@163.com.
authors.forename: Xin
authors.initials: X
authors.lastname: Qiao
authors.affiliation: College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China. huangwen@mail.hzau.edu.cn.
authors.forename: Wen
authors.initials: W
authors.lastname: Huang
authors.affiliation: Institute of Applied Mycology, Huazhong Agricultural University, Wuhan 430070, China. bianyb.123@163.com.
authors.forename: Yinbing
authors.initials: Y
authors.lastname: Bian
mesh_terms: D000327:Adsorption; D002105:Cadmium Poisoning / Q000178:diet therapy*; D002614:Chelating Agents / Q000737:chemistry* / Q000627:therapeutic use; D004305:Dose-Response Relationship, Drug; D005750:Gastric Juice / Q000378:metabolism*; D006801:Humans; D007419:Intestinal Secretions / Q000378:metabolism*; D020942:Shiitake Mushrooms / Q000737:chemistry* / Q000627:therapeutic use; D016060:Sorption Detoxification
chemical_list: D002614:Chelating Agents