title: Removal of cadmium from contaminatedLentinula edodesby optimized complexation and coagulation.
abstract: Heavy metal pollution is a serious problem forLentinula edodes; however, the treatment of contaminatedL. edodeshas seldom been studied. This study investigated the removal of cadmium (Cd) from contaminatedL. edodesand its lentinan by complexation and coagulation. Some influencing factors, such as pH, medical dosage, and preoxidation were examined. Cd complexation from contaminatedL.edodeswas shown to be more efficient under acidic conditions (pH 5.0), with a clearance rate of 80.47% in 25 mmol/L EDTA and 78.45% in 25 mmol/L sodium citrate. The Cd content in the lentinan of the contaminatedL. edodeswas markedly lower than that in the powdered mushroom (2.77 mg/kg vs. 19.49 mg/kg) and was easier to remove. The maximum Cd clearance rate (96.3%) for lentinan was obtained using an optimized process that involved preoxidation with 0.5 mg/L KMnO4, complexing with 25 mmol/L EDTA and 25 mmol/L sodium citrate, and coagulation with 50 mg/L activated carbon (AC) at pH 10.0.
authors.affiliation: Hubei Academy of Agricultural Sciences Institute of Agricultural Products Processing and Nuclear Agriculture Technology Research Wuhan 430064 China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Hubei Academy of Agricultural Sciences Institute of Agricultural Products Processing and Nuclear Agriculture Technology Research Wuhan 430064 China.
authors.forename: Chen
authors.initials: C
authors.lastname: Wang
authors.affiliation: Hubei Academy of Agricultural Sciences Institute of Agricultural Products Processing and Nuclear Agriculture Technology Research Wuhan 430064 China.
authors.forename: Wei
authors.initials: W
authors.lastname: Cheng
authors.affiliation: Institute of Applied Mycology Huazhong Agricultural University Wuhan 430070 China.
authors.forename: Yinbing
authors.initials: Y
authors.lastname: Bian
authors.affiliation: Hubei Academy of Agricultural Sciences Institute of Agricultural Products Processing and Nuclear Agriculture Technology Research Wuhan 430064 China.
authors.forename: Peng
authors.initials: P
authors.lastname: Guo
keywords: Cadmium; Lentinula edodes; heavy metal pollution; lentinan