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| 용출시험을 통한 불산 누출사고지역의 토양 내 불소(F)의 거동특성 |
| 김도영1, 이준석2, 권은혜1, 이현아2, 윤혜온2, 이상훈1 |
1가톨릭대학교 생명공학과 환경공학전공
2한국기초과학지원연구원 |
| Potential Environmental Influences in Soil by Accidental Fluorine (F) Leakage, Using Leaching Test |
| Doyoung Kim1, Junseok Lee2, Eunhye Kwon1, Hyun A Lee2, Hye-On Yoon2, Sanghoon Lee1 |
1Environmental Engineering Section, The Catholic University of Korea
2Seoul Center, Korea Basic Science Institute, Republic of Korea |
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Received: February 27, 2015; Revised: April 21, 2014; Accepted: April 30, 2015. Published online: April 30, 2015. |
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| ABSTRACT |
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Various leaching tests were applied to the soil affected by accidental leakage of HF in an industrial area in Korea. Three different leaching methods including pH-stat, continuous batch leaching, and column tests were adopted to assess leaching characteristics and mobility of fluorine(F) in soil and the potential risks to ecosystem. Both natural and spiked samples were used for the leaching tests. F concentrations in the batch tests increased by leaching rapidly in the early stage of leaching and then maintained rather constant levels. Column leaching test also show similar result to that of the batch test. pH also controlled the leaching behavior of the soil. With increasing pH, more F was released in the pH-stat test. This is mainly due to the competition and exchange with hydroxyl ions, as pH increase to the alkaline range. Most of the F released by the accident seem to have removed in the very early stage of leaching, whereas some natural proportion from soil minerals are thought to have been released very slowly. Therefore, little F released during the accident remained, based on the results of this study on the samples after two years of the accident. We could conclude that soil contaminated by external effects such as chemical accidents should be managed immediately, especially with F. |
| Key Words:
Fluorine, Leaching Behavior, pH-Stat Test, Continuous Batch Leaching Test, Column Test |
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