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| 氢氧化锆对卤水中有机物的吸附特性研究 |
| Adsorption Properties to Zirconium Hydroxide Organic Compounds in Brine |
| 投稿时间：2017-04-01 修订日期：2017-05-05 |
| DOI：10.12119/j.yhyj.201801008 |
| 中文关键词: 氢氧化锆 有机物 吸附 氢键 范德华力 |
| 英文关键词:Zirconium hydroxide Organic matter Adsorption Hydrogen bonding Vander Waals forces |
| 基金项目: |
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| 中文摘要: |
| 研究了卤水中有机物在吸附剂氢氧化锆上的吸附行为。测定了氢氧化锆对有机物在不同温度下的吸附等温线,利用热力学函数关系计算出了吸附焓、自由能和熵变,并探讨了有机物与氢氧化锆的吸附作用机理。实验结果表明,氢氧化锆对有机物的吸附等温线符合Langmuir等温吸附方程；吸附动力学数据符合拟二级反应动力学模型；吸附焓变ΔH及吸附自由能变ΔG分别在-15～-10 kJ/mol及-20～0 kJ/mol范围内,表明氢氧化锆对卤水中有机物的吸附属于自发的物理吸附过程,且吸附过程主要为范德华力吸附及氢键吸附,经脱附再生后的氢氧化锆可完全恢复其形态特征及吸附能力。 |
| 英文摘要: |
| :In this paper, we investigated the adsorption behavior of organic matter in brine on the adsorbent zirconium hydroxide.The adsorption isotherms at different temperatures were determined.The adsorption enthalpy, free energy and entropy change were calculated on the basis of thermodynamic function.And the adsorption mechanism between the organic matter and zirconium hydroxide was further illustrated.Results show that the adsorption isotherms of zirconium hydroxide are e consistent with Langmuir isothermal adsorption equation.The adsorption kinetic data conformed to the quasi\|second order reaction kinetics model.The adsorption enthalpy (ΔH) and the adsorption free energy variable (ΔG) are in the range of -15～-10 kJ/mol and -20～0 kJ/mol, respectively, indicating that the adsorption of organic compounds in brine on the zirconium hydroxide belonged to spontaneous physical adsorption process majorly based on the van der Waals adsorption and hydrogen\|bond adsorption.Zirconium hydroxide that regenerated after the desorption restore the morphological characteristics and adsorption capacity. |
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