林产化学与工业Issue(5)：27-34,8.DOI:10.3969/j.issn.0253-2417.2014.05.005
稻壳与脱硅稻壳活性炭特性及对有机物吸附
The Adsorption Properties of Rice Husk-based and Silicon-freed Rice Husk-based Activated Carbon on Organic Compounds
摘要
Abstract
The activated carbons were prepared from rice husks and silicon-freed rice husks by composite activator. The difference between rice husk-based activated carbon ( RAC) and silicon-freed rice husk based activated carbon ( FAC) in pore structure and surface chemistry were analyzed. The synthesized activated carbon was used as adsorbents in water treatment. The adsorption properties, isotherms and kinetics of fuchsine on activated carbons were investigated. The results indicated that the BET surface area of RAC and FAC reached 1 924 and 2 433 m2/g, respectively. There FAC has more functional groups compared with RAC. RAC and FAC could improve the removal efficiency of fuchsine at high pH value. The adsorbents could be used in high salt concentration conditions. When the initial pH 7, initial mass concentration 400 mg/L and the adsorbents dosages 0. 8 mg/g were used, the adsorption capacity of RAC and FAC was 439 and 483 mg/g, respectively. The Langmuir isotherm model was found to fit well with the adsorption process of RAC and FAC. Both the kinetics and desorption study indicated that the adsorption process was controlled by chemisorption.关键词
稻壳/活性炭/品红/吸附动力学/等温吸附Key words
rice husk/activated carbon/fuchsine/adsorption kinetics/adsorption isotherm分类
化学化工引用本文复制引用
刘斌,顾洁,邱盼,陆裕聪,周建斌..稻壳与脱硅稻壳活性炭特性及对有机物吸附[J].林产化学与工业,2014,(5):27-34,8.基金项目
林业公益性行业科研专项项目(201304611) （201304611）
国家973计划资助项目(2010CB732205) （2010CB732205）
江苏高校优势学科建设工程资助项目(无编号) （无编号）
