中华医学超声杂志

应用化学 ›› 2011, Vol. 28 ›› Issue (09): 1067-1072.DOI: 10.3724/SP.J.1095.2011.00631

• 研究论文 • 上一篇    下一篇

D301R树脂对水溶液中硝基苯的吸附性质

华英杰,王崇太*,李天略,何猛雄,徐坤琴   

  1. (海南师范大学化学与化工学院 海口 571158)
  • 收稿日期:2010-10-22 修回日期:2011-02-05 出版日期:2011-09-10 发布日期:2011-09-10
  • 通讯作者: 王崇太，教授; Tel:0898-65736636; E-mail:wct581@sina.com; 研究方向：光、电催化及其在能源、环境中的应用
  • 基金资助:
    国家自然科学基金(20963003)海南省重点科技项目(080305;090803)海南省自然科学基金(509009)资助项目

The Adsorptive Properties of the D301R Resin Toward Nitrobenzene in Aqueous Solution

HUA Yingjie, WANG Chongtai*, LI Tianlue, HE Mengxiong, XU Kunqin   

  1. (School of Chemistry and Chemical Engineering,Hainan Normal University,Haikou 571158)
  • Received:2010-10-22 Revised:2011-02-05 Published:2011-09-10 Online:2011-09-10
  • Contact: hua yingjie

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1341

被引次数

4 | 2

摘要：

研究了D301R弱碱性阴离子交换树脂对水中硝基苯的吸附作用，测定了不同温度下吸附的动力学曲线和吸附等温线，提出了吸附动力学模型，计算了平衡吸附量、吸附活化能和吸附焓等。 实验结果表明，吸附动力学符合表面过程控制的准二级反应模型，其速率常数k2在300 K时为3.74×10-2 g/(mg·min)，并随温度的升高而升高；平衡吸附量在300 K时为5.02 mg/g，且随温度的升高而降低；吸附活化能为39.02 kJ/mol；吸附等温线符合Langmuir吸附模型，吸附焓为-22.47 kJ/mol，吸附作用力主要是氢键。

关键词: D301R树脂, 硝基苯, 吸附动力学, 吸附等温线

Abstract:

The adsorptive properties of the D301R resin towards nitrobenzene in aqueous solution were investigated in details. The adsorption kinetic curves and adsorption isotherm curves were determined at different temperatures. An adsorption kinetic model was proposed. The equilibrium adsorption capacity, the adsorptive activation energy and the adsorption enthalpy were estimated. The experimental results showed that the adsorption kinetics follows a pseudo-second-order equation controlled by a surface process. The rate constant k2 is 3.74×10-2 g/(mg·min) at 300 K, which increases with the increase of temperature. The equilibrium adsorption capacity is 5.02 mg/g at 300 K, which decreases with the increase of temperature. The adsorptive activation energy is 39.02 kJ/mol. The adsorption isotherm is consistent with the Langmuir isotherm and the calculated adsorption enthalpy is about -22.47 kJ/mol. The hydrogen bonding was suggested to be responsible for nitrobenzene adsorption onto D301R resin.

Key words: D301R resin, nitrobenzene, adsorption kinetics, adsorption isotherm

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