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Environmental Engineering Research 2004;9(1): 38-44. DOI: https://doi.org/10.4491/eer.2004.9.1.038
SENSITIVITY ANALYSIS OF PLUG FLOW PORE SURFACE DIFFUSION MODEL I: FOR SINGLE COMPONENT
Seongho Hong
Department of Chemical and Environmental Engineering, Soongsil University, Seoul, Korea
Corresponding Author: Seongho Hong ,Tel: +82-2-820-0628, Fax: +82-2-812-5378, Email: shong@ssu.ac.kr
Received: November 15, 2003;  Accepted: February 6, 2004.
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ABSTRACT
Adsorption of organic component on activated carbon is an interfacial phenomenon which is driven by concentration difference or gradient of solute at a phase boundary compared to the bulk solution. The used model to predict adsorption of organic component is plug flow pore surface diffusion model (PFPSDM). The sensitivity analysis was performed to determine which parameters have the greatest impact on the model results for a single component which can represent various organics. For the single component sensitivity analysis, the molecular weight was an important parameter. The breakthrough of the smaller molecular weight components was impacted more by backwashing. The SPDFR showed a significant impact on the breakthrough pattern. When surface diffusion was the dominant mechanism, high SPDFR, the breakthrough profile was sharper than when pore diffusion was dominant, low SPDFR, The adsorbability was an important parameter in determining the breakthrough pattern. As expected, the strongly adsorbable component showed the later breakthrough. Backwashing yielded earlier breakthrough for all single components examined.
Keywords: GAC | Adsorption | numerical model | NOM | Freundlich isotherm
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