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›› 2010, Vol. 10 ›› Issue (1): 65-69.

• 反应与分离 • 上一篇    下一篇

山核桃壳活性炭制备及其吸附苯胺特性

余筱洁 周存山 王允祥 庞林江   

  1. 浙江林学院农业与食品科学学院 浙江林学院农业与食品科学学院 浙江林学院农业与食品科学学院 浙江林学院农业与食品科学学院
  • 收稿日期:2009-08-17 修回日期:2009-10-09 出版日期:2010-02-20 发布日期:2010-02-20
  • 通讯作者: 周存山

Preparation of Activated Carbon from Shell of Carya cathayensis S. and Its Adsorption Behavior of Aniline

YU Xiao-jie ZHOU Cun-shan WANG Yun-xiang PANG Lin-jiang   

  1. Zhejiang Forestry University Zhejiang Forestry University Zhejiang Forestry University Zhejiang Forestry University
  • Received:2009-08-17 Revised:2009-10-09 Online:2010-02-20 Published:2010-02-20
  • Contact: ZHOU Cun-shan

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被引次数

134

摘要： 采用磷酸法制备山核桃壳活性炭，并以磷酸浓度、活化温度和活化时间为因素，亚甲基蓝脱色力、碘吸附值及得率为指标，进行正交设计优化，从热力学角度研究了山核桃壳活性炭对苯胺的吸附行为. 结果表明，磷酸法制备山核桃壳活性炭的优化工艺条件为：磷酸50%(w)，活化温度300℃，活化时间45 min. 在此条件下，活性炭得率为53.21%，碘吸附值为804.36 mg/g，亚甲基蓝脱色力为102 mL/g. 在所研究的条件范围内，活性炭对苯胺的吸附能力随温度升高而增大，酸性条件有利于吸附. 吸附是自发吸热的物理吸附过程，遵循Freundlich吸附等温线.

关键词: 山核桃壳, 活性炭, 苯胺, 吸附行为

Abstract: The conditions for preparation of activated carbon from walnut (Carya cathayensis S.) shell were studied with phosphate method, and optimized with orthogonal experiments taking phosphate concentration, carbonizing temperature and time as influential factors, methylene blue adsorption, iodine value and yield as indexes, and the adsorption process was analyzed in thermodynamics. The results showed that the adsorption value of the activated carbon to methylene blue was 102 mL/g, the iodine value 804.36 mg/g, and the yield 53.21%, which was produced at the conditions of 300℃ activation temperature, 45 min activation time and phosphate concentration 50%(w). In the studied conditions, the adsorption increased with increasing of temperature, acidic condition was beneficial to the adsorption. The equilibrium data fit well with Freundlich isotherm, and the thermodynamic parameters indicated that the adsorption reaction was exothermic and spontaneous.

Key words: shell of Carya cathayensis S., activated carbon, aniline, adsorption behavior

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