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http://dx.doi.org/10.5394/KINPR.2004.28.5.463

Solvent Extraction of Organotin from Ship Wash Wastewater  

Song, Young-Chae (한국해양대학교 토목환경공학과)
Woo, Jung-Hui (한국해양대학교 토목환경공학)
Kim, In-Soo (한국해양대학교 토목환경공학)
Park, Sang-Ho (한국해양대학교 토목환경공학)
Kim, Dong-Geun (한국해양수산연구원 수산교육팀)
Publication Information
Journal of Navigation and Port Research / v.28, no.5, 2004 , pp. 463-468 More about this Journal
Abstract
A lab-scale fundamental study to develop the solvent extraction process of ship wash wastewater containing TBT was carried out. 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 those of other tested solvents, and the proper amount of the extraction solvent for 1L of the wastewater was l0mL. When the agitation intensity was increased from 50rpm to 250rpm, the TBT remained in the wastewater after the extraction was decreased from around 120ppb to 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.
Keywords
Dry dock; TBT(Tributyltin); Ship wash wastewater; Solvent extraction; Agitation intensity;
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