Fabrication, characterization and evaluation of mesoporous activated carbons from agricultural waste： Jerusalem artichoke stalk as an example  

作　　者：Lei YU Chen TU Yongming LUO 

机构地区：[1]Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, N anjing 210008, China [2]Key Laboratory of Coastal Zone Environmental Processes, Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China [3]Department of Environmental Engineering, Nanjing Forestry University, Nanjing 210037, China

出　　处：《Frontiers of Environmental Science & Engineering》2015年第2期206-215,共10页环境科学与工程前沿（英文）

基　　金：Acknowledgements The authors acknowledge funding support from the National Natural Science Foundation of China （Grant No. 41171248） and China Postdoctoral Science Foundation fimded project （2012M511330）.

摘　　要：This work explores the feasibility of Jerusalem artichoke stem （JAS）, an agricultural waste, as an alternative precursor for fabrication of mesoporous activated carbon （MAC） via conventional ZnC12 activation. The as-prepared JAS-MACs were characterized by thermogravimetric, nitrogen gas adsorption isotherm and high resolution scanning electron microscopy analysis. The interacting effects of chemical dosage, activation temperature and time on the mesoporosity, mesopore volume and carbon yield were investigated, and further optimized by response surface methodology （RSM）. The Brunauer-Emmett-Teller surface area, mesoporosity and mesopore volume of the JAS-MAC prepared under optimum condition were identified to be 1631 m^2·g ^-1, 90.16% and 1.11 cm3·g ^-1, respectively. Compared with commercial activated carbons, this carbon exhibited a comparable monolayer adsorption capacity of 374.5 mg .g 1 for Methylene Blue dye. The findings suggest that RSM could be an effective approach for optimizing the pore structure of fabricated activated carbons.This work explores the feasibility of Jerusalem artichoke stem （JAS）, an agricultural waste, as an alternative precursor for fabrication of mesoporous activated carbon （MAC） via conventional ZnC12 activation. The as-prepared JAS-MACs were characterized by thermogravimetric, nitrogen gas adsorption isotherm and high resolution scanning electron microscopy analysis. The interacting effects of chemical dosage, activation temperature and time on the mesoporosity, mesopore volume and carbon yield were investigated, and further optimized by response surface methodology （RSM）. The Brunauer-Emmett-Teller surface area, mesoporosity and mesopore volume of the JAS-MAC prepared under optimum condition were identified to be 1631 m^2·g ^-1, 90.16% and 1.11 cm3·g ^-1, respectively. Compared with commercial activated carbons, this carbon exhibited a comparable monolayer adsorption capacity of 374.5 mg .g 1 for Methylene Blue dye. The findings suggest that RSM could be an effective approach for optimizing the pore structure of fabricated activated carbons.

关 键 词：mesoporous activated carbon response sur-face methodology adsorption isotherm agricultural wastes 

分 类 号：TQ424.1[化学工程] X71[环境科学与工程—环境工程]