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›› 2014, Vol. 31 ›› Issue (4): 466-470.DOI: 10.7523/j.issn.2095-6134.2014.04.004

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Thermodynamics effect of high-concentration Cl- and HCO3- ions in coalbed methane co-produced water on the adsorption of F- by activated alumina

ZHU Xiaoqi, HUANG Lijuan, HU Zhengyi, LIU Xiaoning, WANG Huihui   

  1. College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2013-08-14 Revised:2013-09-29 Online:2014-07-15

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.

Key words: CBM co-produced water, Cl- and HCO3-ion, F-, activated alumina, thermodynamics

CLC Number: