Geosciences Journal

The Association of Korean Geoscience Societies (한국지질과학협의회)
권호 표지

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

Heo, Joong-Hyeok;Lee, Dal-Heui;Koh, Dong-Chan;Chang, Ho-Wan

  • Published : 20070900
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Abstract

The objective of this study is to evaluate the effect ofionic strength and hardness of trichloroethylene (TCE)-contami-nated synthetic groundwater on remediation using granular acti-vated carbon (GAC). The TCE sorption rate onto GAC in syntheticgroundwater was observed by batch experiments and rangedfrom 86.2% to 100%. As the ionic strength and hardness of thesynthetic groundwater increased, the TCE sorption rates decreased.The sorption kinetics of the GAC were also analyzed by kineticmodels. The Elovich model was more successfully applicable to thesorption kinetics than the Pseudo-first-order model. During thesorption, a greater amount of cations in groundwater were adsorbedthan anions. The sorption capacity of GAC was affected by cationsin groundwater. The GAC surface area was 958.98 m2/g and thecalculated TCE and ions sorption areas were 318.38 m2/g, whichcomprised 33.2% of the GAC surface area. Our experimentsshowed that TCE remediation was influenced by the ionic strengthand hardness of groundwater. The results of these experimentswere confirmed by two different models and sorption areas.Therefore, the ionic strength and hardness of groundwater mustbe considered in the remediation of TCE-contaminated ground-water using GAC. Key words : Ionic strength, Hardness, TCE, Remediation, GAC

Keywords

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