| 선박 세척폐수에 함유된 유기주석화합물의 용매추출특성 |
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송영채, 우정희, 김인수, 박상호, 김동근 |
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| Solvent Extraction of Organotin from Ship Wash Wastewater |
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Young-Chae Song, Jung-Hui Woo, In-Soo Kim, Sang-Ho Park, Dong-Geun Kim |
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| Abstract |
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A lab-scale fundamental study to develop the solvent extraction process of ship wash wastewater containing TBT was carried put. For various solvents, including diesels for car and ship, bunker B, thinner, toluene, and ether, the extraction efficiencies of TBT from synthetic ship wash wastewater were compared. The effect of extraction conditions, such as solvent amount, time and intensity of agitation, and pH, on the extraction efficiency of TBT was evaluated. Diesel for ship showed better extraction efficiency of TBT than whose of other tested solvents, and the proper amount of the extraction solvent for 1L of the wastewater was 10mL. When the agitation intensity was increased from 50rpm to 250rpm, the TBT remained in the wastewater after the extraction was decreased from around 120ppb t0 2.8ppb. The remaining TBT in the wastewater was sharply decreased from 1hr of the extraction time, but was slightly increased again after 5hrs of the extraction time. The efficiency of TBT extraction was good in the weak acid range of pH, but was not significant as much as the others. |
| Key Words:
Dry dock;TBT(Tributyltin);Ship wash wastewater;Solvent extraction;Agitation intensity |
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