The effect of ionic strength and hardness of trichloroethylene-contaminated synthetic groundwater on remediation using granular activated carbon

The objective of this study is to evaluate the effect of ionic strength and hardness of trichloroethylene (TCE)-contaminated synthetic groundwater on remediation using granular activated carbon (GAC). The TCE sorption rate onto GAC in synthetic groundwater was observed by batch experiments and range...

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Bibliographic Details
Published in:Geosciences journal (Seoul, Korea) Korea), 2007-09, Vol.11 (3), p.229-239
Main Authors: Heo, Joong-Hyeok, Lee, Dal-Heui, Koh, Dong-Chan, Chang, Ho-Wan
Format: Article
Language:English
Subjects:
Activated carbon
Adsorption
Anions
Cations
Groundwater
Groundwater pollution
Hardness
Kinetics
Mathematical models
Remediation
Solvents
Sorption
Strength
Surface area
Trichloroethene
Trichloroethylene
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Summary:The objective of this study is to evaluate the effect of ionic strength and hardness of trichloroethylene (TCE)-contaminated synthetic groundwater on remediation using granular activated carbon (GAC). The TCE sorption rate onto GAC in synthetic groundwater was observed by batch experiments and ranged from 86.2% to 100%. As the ionic strength and hardness of the synthetic groundwater increased, the TCE sorption rates decreased. The sorption kinetics of the GAC were also analyzed by kinetic models. The Elovich model was more successfully applicable to the sorption kinetics than the Pseudo-first-order model. During the sorption, a greater amount of cations in groundwater were adsorbed than anions. The sorption capacity of GAC was affected by cations in groundwater. The GAC surface area was 958.98 m^sup 2^/g and the calculated TCE and ions sorption areas were 318.38 m^sup 2^/g, which comprised 33.2% of the GAC surface area. Our experiments showed that TCE remediation was influenced by the ionic strength and hardness of groundwater. The results of these experiments were confirmed by two different models and sorption areas. Therefore, the ionic strength and hardness of groundwater must be considered in the remediation of TCE-contaminated groundwater using GAC.[PUBLICATION ABSTRACT]
ISSN:1226-4806
1598-7477
DOI:10.1007/BF02913936