Physicochemical interactions of spiculisporic acid based biosurfactant with metal ions and colloidal particles = 스피큘리스포릭산으로부터 유도된 생물계면활성제와 금속이온 및 콜로이드 입자의 물리화학적 상호작용

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In this thesis, physicochemical interactions of a biosurfactant, sodium salt of tricarboxylic acid (DCMA-3Na), derived from spiculisporic acid with metal ion and colloidal particles were investigated. First, the precipitation phase boundary diagrams of DCMA-3Na and divalent metal ions, $Ca^{+2},\ Mg^{+2},\ Zn^{+2}$ and $Cu^{+2}$, and trivalent ion $Al^{+3}$ consisted of two branches which were surfactant precipitation equilibrium line with negative slope and micelle saturation equilibrium line with infinite slope, respectively, in all the cases considered here except the precipitation boundary diagrams for DCMA-Cu and DCMA-Al systems. Secondly, DCMA-metal precipitates were observed through optical microscope. The precipitates of a few m in size clumped together to form aggregates. Thirdly, using biosurfactant-based ultrafiltration, effects of metal species, the molar ratios of biosurfactant to metal ion and filtration time on the relative fluxes through ultrafiltration membrane, and rejection efficiencies for both the metal ions and biosurfactant were investigated. Finally, adsorption isotherms of DCMA-3Na on $TiO_2$, zeta potential, and changes of particle size as a function of biosurfactant concentration, solid-liquid ratio and pH were systematically investigated.
Advisors
Yang, Seung-Manresearcher양승만researcher
Description
한국과학기술원 : 화학공학과,
Publisher
한국과학기술원
Issue Date
1997
Identifier
113080/325007 / 000935402
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 화학공학과, 1997.2, [ xv, 194, [10] p. ]

Keywords

Metal ions; Biosurfactant; Spiculisporic acid; Colloidal particles; 콜로이드 입자; 금속이온; 생물계면활성제; 스피큘리스포릭산

URI
http://hdl.handle.net/10203/28757
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=113080&flag=dissertation
Appears in Collection
CBE-Theses_Ph.D.(박사논문)
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