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›› 2012, Vol. 12 ›› Issue (5): 785-788.

• 反应与分离 • 上一篇    下一篇

炭化谷壳对苯胺废水的吸附特性

曾荣英 唐文清 冯泳兰 王雪新 吴安富 李小明   

  1. 衡阳师范学院化学与材料科学系 衡阳师范学院化学与材料科学系 衡阳师范学院化学与材料科学系 衡阳师范学院化学与材料科学系 衡阳师范学院化学与材料科学系 湖南大学环境科学与工程学院
  • 收稿日期:2012-08-27 修回日期:2012-09-28 出版日期:2012-10-20 发布日期:2012-10-20
  • 通讯作者: 唐文清

Adsorption Characteristics of Aniline in Wastewater with Carbonized Rice Husk

ZENG Rong-ying TANG Wen-qing FENG Yong-lan WANG Xue-xin WU An-fu LI Xiao-ming   

  1. Department of Chemistry and Materials Science, Hengyang Normal University Department of Chemistry and Materials Science, Hengyang Normal University Department of Chemistry and Materials Science, Hengyang Normal University Department of Chemistry and Materials Science, Hengyang Normal University Department of Chemistry and Materials Science, Hengyang Normal University College of Environmental Science and Engineering, Hunan University
  • Received:2012-08-27 Revised:2012-09-28 Online:2012-10-20 Published:2012-10-20
  • Contact: TANG Wen-qing

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摘要： 采用磷酸活化原材料谷壳，分别在300和600℃对活化谷壳进行炭化，制得炭化谷壳吸附剂(CC1和CC2)，通过静态吸附实验研究了炭化谷壳对苯胺的吸附性能，采用比表面积分析仪对炭化谷壳进行表征，考察了pH值和温度等对吸附的影响. 结果表明，CC2吸附苯胺能力比CC1强，Langmuir方程拟合等温吸附效果最好；准二级动力学模型能较好地描述炭化谷壳对苯胺的吸附行为，相关系数高达0.999；计算了热力学参数DGq, DHq和DSq值，DGq为负值，说明该吸附为自发过程.

关键词: 炭化谷壳, 苯胺, 吸附等温方程, 动力学, 热力学

Abstract: Activated carbon prepared from rice husk with phosphoric acid as activator at 300 and 600℃ was utilized as adsorbent (samples CC1 and CC2) to remove aniline from aqueous solution. The carbonized husk was characterized by Brunauer-Emmett-Teller analysis. Batch experiments were conducted to study the effects of pH value and temperature (20 and 30℃) on aniline adsorption. The adsorption behaviour of aniline on carbonized rice husk was also evaluated. The results showed that the CC2 had greater adsorption efficiency than CC1. The Langmuir model was applied to describe the adsorption isotherms of aniline. Kinetic studies showed that the adsorption process followed pseudo-second-order kinetic model with the correlation coefficient of 0.999. The thermodynamic parameters of ΔGq, ΔHq and ΔSq were also calculated. The negative ΔGq values indicated that the adsorption process was spontaneous.

Key words: carbonized rice husk, aniline, adsorption isotherm, kinetics, thermodynamics

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