earticle

영어

The chemical analysis and surface chemical properties of biosurfactant formed by Rhodococcus sp. strain IGTS8, which is widely used in biodesulfurization process, in hexadecane/water mixture have been studied. For the chemical analysis, TLC technique was employed. The surface tension, CMC, and emulsion stability of biosurfactant solution were also investigated. The major components of biosurfactant formed by Rhodococcus sp. strain IGTS8 were glucose mycolate and trehalose monomycolate. The CMC of aqueous biosurfactant solution was 0.1～0.15 g/100 mL of water at pH 6.0-6.5 and pH 10～10.5. But the demulsification was faster at pH 10 than at pH 6.3.

한국어

탈황공정에 많이 이용되는 미생물인 Rhodococcus sp. strain IGTS8이 hexadecane과 배지 수용액 혼합물에서 생성하는 biosurfactant의 성분분석과 계면물성을 연구하였다. TLC를 이용한 정성적 성분분석 결과 생성되는 biosurfactant는 glucose mycolate와 trehalose monomycolate임을 확인하였고 임계 미셀농도는 pH 6～6.5와 pH 10～10.5에서 100 mL의 수용액에 biosurfactant가 0.1～0.15 g 첨가될 때였으며 유화파괴 속도는 pH가 높을수록 증가하였다.