农业环境科学学报Issue(10)：2022-2029,8.DOI:10.11654/jaes.2014.10.020
花生壳与花生壳生物炭对镉离子吸附性能研究
Adsorption of Cadmium(Ⅱ)on Peanut Shell and Its Biochar
摘要
Abstract
Peanut shell is waste from agriculture and industry. This study was conducted to investigate the potential of peanut shell(PS)and its biochar(PSB)to remove cadmium(Cd2+)from aqueous solution under different conditions including pH, initial Cd2+ concentrations, ad-sorbent doses and time. The surface characteristics and mechanism of Cd adsorption were also investigated using scanning electron micro-scope, Fourier transform infrared spectroscopy(FTIR), BET specific surface area analyses and model simulation. Both PS and PSB were excellent adsorbents for Cd2+. At pH 5, 10 mg·L-1 of Cd2+ concentration and 4 mg·mL-1 of adsorbent, Cd2+ removal efficiencies were 93.33%and 99.51% for PS and PSB, respectively. The maximum adsorption for Cd2+ was respectively 26.88 mg·g -1 and 28.99 mg·g-1 for PS and PSB. Freundlich and Langmuir models could be used to describe the adsorption data, with the former better than the latter. The adsorption was mainly polymolecular layer adsorption and the complexation was one of the adsorption mechanisms. The main functional groups involved in the complexation were -CHO,-C=O,-OH and-P=O for PS;while-C=C-,-C以C-,-C≡N and -OH for PSB. The SEM and FTIR analyses showed that a lot of particles or ash substances were deposited on the surface of PS and PSB after adsorption of Cd2+.关键词
花生壳/花生壳生物炭/镉/傅里叶红外/等温吸附模型/生物质基材料Key words
peanut shells(PS)/peanut shell derived biochar(PSB)/cadmium(II)/Fourier Transform infrared spectroscopy(FTIR)/isotherm models/biomass-based material分类
资源环境引用本文复制引用
程启明,黄青,刘英杰,廖祯妮..花生壳与花生壳生物炭对镉离子吸附性能研究[J].农业环境科学学报,2014,(10):2022-2029,8.基金项目
国家科技支撑计划项目（2014BAD14B04）；中国科学院重点部署项目 （）
