A novel biosorbent: characterization of the spent mushroom compost and its application for removal of heavy metals  

作　　者：CHEN Gui-qiu ZENG Guang-ming TU Xiang HUANG Guo-he CHEN Yao-ning 

机构地区：[1]Department of Environmental Science and Engineering, Hunan University, Changsha 410082, China

出　　处：《Journal of Environmental Sciences》2005年第5期756-760,共5页环境科学学报（英文版）

基　　金：The National Natural Science Foundation of China for Distinguished Young Scholars(No.50225926 ,50425927) ;the Teaching and Research AwardProgramfor Outstanding Youth Teachers in Higher Education Institutions of MOE,China(TRAPOYT) in 2000 ,the Doctoral Foundation of Ministry of Education of China(No.20020532017) andthe Hi-Tech Research and Development Program(863) of China(No.2001AA644020 ,2003AA644010 and 2004AA649370)

摘　　要：The spent mushroom compost of Lentinus edodes was used as a biosorbent for adsorbing cadmium, lead and chromium from solutions under batch conditions for the first time. Titration of the biomass revealed that it contained at least three types of functional groups. The Fourier transform infrared spectrometry showed that the carboxyl, phosphoryl, phenolic groups were the main groups. The simulated values of pK, and molar quantity were 5.00 and 0.44 mmol/g, 7.32 and 1.38 mmol/g, 10.45 and 1.44 mmol/g, respectively. The biosorption ability increased with pH in acid condition. When 10 mg/L biomass dosage was added in, there was no significant increment of metal uptake. The maximum uptake estimated with the Langmiur isotherm model were 833.33 mg/g for Cd（ Ⅱ ）, 1000.00 mg/g for Pb（ Ⅱ ） and 44.44 mg/g for Cr（ Ⅲ ）, respectively. All the results showed that vast potential sorption capacity was existed in the biomass for adsorbing these three kinds of metals studied.The spent mushroom compost of Lentinus edodes was used as a biosorbent for adsorbing cadmium, lead and chromium from solutions under batch conditions for the first time. Titration of the biomass revealed that it contained at least three types of functional groups. The Fourier transform infrared spectrometry showed that the carboxyl, phosphoryl, phenolic groups were the main groups. The simulated values of pK, and molar quantity were 5.00 and 0.44 mmol/g, 7.32 and 1.38 mmol/g, 10.45 and 1.44 mmol/g, respectively. The biosorption ability increased with pH in acid condition. When 10 mg/L biomass dosage was added in, there was no significant increment of metal uptake. The maximum uptake estimated with the Langmiur isotherm model were 833.33 mg/g for Cd（ Ⅱ ）, 1000.00 mg/g for Pb（ Ⅱ ） and 44.44 mg/g for Cr（ Ⅲ ）, respectively. All the results showed that vast potential sorption capacity was existed in the biomass for adsorbing these three kinds of metals studied.

关 键 词：spent mushroom compost CHARACTERIZATION biosorptlon heavy metals 

分 类 号：X703.1[环境科学与工程—环境工程]