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핵 심 기 술 Ⅲ

핵 심 기 술 Ⅲ. Separated Component Zones. Initial Sample Zone. Field. Channel Flow. Convection. Accumulation wall  “ Membrane”. Parabolic Flow Profile by channel flow. Diffusion. 멤브레인 막오염 예측 / 평가 기술 개발 : Flow Field Flow Fractionation (FlFFF).

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핵 심 기 술 Ⅲ

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  1. 핵 심 기 술 Ⅲ Separated Component Zones Initial Sample Zone Field Channel Flow Convection Accumulation wall“Membrane” Parabolic Flow Profile by channel flow Diffusion • 멤브레인 막오염 예측/평가 기술 개발 • : Flow Field Flow Fractionation (FlFFF) • 특정오염물질의 멤브레인에서의 이동특성 평가: 유효크기 및 확산계수 산정 • 특정오염물질-특정멤브레인 사이의 막오염 경향 해석/예측: moment analyses

  2. Results 핵심기술 Ⅲ FlFFF: Effective Size & Diffusivity of Organic Matter 대표적 용존유기물질의 멤브레인 특성에 따른 effective size 분석 regenerated cellulose (neutral & hydrophilic) NE-90 (새한) (negative-charged & hydrophobic) • effect of ionic strength on the retention time and the shape of peak  NE-90 >> RC • RT in NE-90 : DI water < 0.05% FL-70 < 1mM KCl (increase of hydrophobic property)

  3. Results 핵심기술 Ⅲ < 2nm 6~14nm FlFFF를 이용한 하수처리수 내 유기물질(EfOM)의 막오염 경향 분석 • 멤브레인의 특성에 따라 FlFFF peak의 경향이 달라짐 •  검출방법에 따른 화학적 특성 분석 •  막오염 예측/평가 가능 “Reference membrane:RC”

  4. Results 핵심기술 Ⅲ FlFFF: Effective Size & Diffusivity of Organic Matter 특정 오염물질의 solution chemistry에 따른 effective size 분석 PSS, Na salt (1,800~35,000 Da) in RC 1kD Conductivity, mS/cm 1,400~ d=0.0038Mw0.73, R2=0.991 120 50 10~20 d=0.025Mw0.44, R2=0.9993

  5. Results 핵심기술 Ⅲ FlFFF: Effective Size & Diffusivity of Organic Matter 대표적 용존유기물질의 solution chemistry에 따른 effective size 분석 FL-70 FL-70 KCl KCl 10mM KCl cond. 1.4mS/cm The effect of solution chemistry on the solute transport characteristics : open rod-like structure close coiled structure

  6. Results 핵심기술 Ⅲ FlFFF를 이용한 하수처리수 내 유기물질 이동특성 및 막오염예측 (reference membrane) *EfOM: MBR effluent organic matter, **hydrophobic fraction of MBR EfOM Fouling propensity: hydrophobic EfOM>protein-like EfOM Effect of solution chemistry: ionic strength

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