| 煤层气产出水中高浓度Cl-和HCO3-对活性氧化铝吸附F-的热力学影响 |
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| 作者姓名： | 朱晓琦 黄丽娟 胡正义 刘小宁 王惠惠 |
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| 作者单位： | 中国科学院大学资源与环境学院, 北京 100049 |
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| 基金项目： | 国家科技重大专项（2011ZX05060-005，2008ZX05039-003）资助 |
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| 摘 要： | 通过室内试验模拟煤层气产出水中高浓度Cl-（1000 mg·L-1）和HCO3-（2000 mg·L-1）对活性氧化铝吸附F-的热力学影响，并借助扫描电镜（SEM）分析活性氧化铝吸附F-前后表面性质变化，探讨高浓度Cl-和HCO3-对活性氧化铝吸附F-的影响.结果表明，活性氧化铝对F-的吸附反应属于吸热反应（ΔH>0），可自发进行（ΔG<0），熵驱动（ΔS>0）是吸附的主要推动力；当水中高浓度Cl-和HCO3-共存时，并不影响活性氧化铝对F-吸附反应的方向，但使吸附反应进行不彻底，吸附量降低.
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| 收稿时间： | 2013-08-14 |
| 修稿时间： | 2013-09-29 |
Thermodynamics effect of high-concentration Cl- and HCO3- ions in coalbed methane co-produced water on the adsorption of F- by activated alumina |
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| Authors: | ZHU Xiaoqi HUANG Lijuan HU Zhengyi LIU Xiaoning WANG Huihui |
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| Institution: | College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | We investigated thermodynamics effect of Cl- (1000 mg·L-1) and HCO3- (2000 mg·L-1) in coalbed methane co-produced water on adsorption of fluoride (F-) by activated alumina, and discussed the change in adsorption capacity by analyzing the surface solid characterizations of activated alumina. The results show that adsorption process is an endothermic reaction (ΔH>0) and entropy (ΔS>0) is the main driving force. The co-existence of high-concentration Cl- and HCO3- will decrease the equilibrium F- adsorption by activated alumina. |
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