This study has evaluated the applicability of purifying groundwater contaminated with chlorinated aliphatic hydrocarbons in urban areas using the manufactured slow-releasing tablets. Tablet dissolution characteristics were conducted in the batch experimentson. In addition, the applicability of slow-releasing oxidation tablet containing persulfate and activation tablet containing ferrous iron was evaluated through a small-scale in-situ oxidation process in the field.
Dissolution characteristics of the two tablets were derived through tablet dissolution experiments. It was confirmed that the persulfate and ferrous iron showed similar dissolution patterns. In addition, it was confirmed that the amount of ferrous iron released were enough to activate persulfate.
In the batch reactor experiment, the concentration of vinyl chloride (VC) and benzene in the control reactor was maintained at the injection concentration. When oxidation and activation tablets were added, 100% of VC and benzene were removed within 5 and 2 days, respectively. It was confirmed that the oxidation of the pollutants was effective by adding both oxidation and activation tablets.
In order to evaluate the oxidation of the pollutants through a small-scale in-situ chemical oxidation process(ISCOP), single well injecion-extraction experiment was conducted. As a result of single well injection-extraction experiments, the concentration of chlorinated aliphatic hydrocarbons was reduced by 89% compared to the maximum concentration until 10 days after the first tablet injection. During the second tablet injection period, the 73% reduction efficiency was maintained after injection of 28 days.
Consequently, it is confirmed that the oxidation and activation tablets were effective to remediate groundwater contaminated with chlorinated aliphatic hydrocarbons.

핵심어 (Key Words) : Chlorinated aliphatic hydrocarbons(CAHs), Slow-releasing oxidation and activation tablet, Single well injection-extraction experiment