Author

Sewoon Kim

Date of Award

Spring 2021

Document Type

Open Access Dissertation

Department

Civil and Environmental Engineering

First Advisor

Yeomin Yoon

Abstract

Organic contaminants, which result from overuse and discharge of dyes, pharmaceutically active compounds, personal care products, and endocrine-disrupting compounds, have been received attention as contemporary water issues. However, conventional water and/or wastewater treatment system cannot sufficiently control for these contaminants for their stability and complexity. In this study, combined novel adsorbent with ultrafiltration (UF) hybrid system (termed ‘adsorbent-UF’) was applied to removal selected organic contaminants. UF with upstream adsorption has positive effects on performance in terms of the removal of selected organic contaminants, separating used adsorbents and reducing foulants. Activated biochar, metal organic frameworks, and Ti3C2TX MXene were used as novel adsorbents for this study. For selected organic contaminants, retention and flux performance were investigated on adsorbent-UF. The adsorbent-UF system was also evaluated under various water quality such as pH, natural organic matter, and background ions for better understanding of behavior in real aquatic environments. Additionally, by comparing the performance of three adsorbent-UF and powdered activated carbon-UF system, feasibility of an adsorbent-UF was investigated as a suitable alternative technology. Consequently, property change of organic contaminants by various water quality are the key to better performance on adsorbent-UF. Also, based on these results, the adsorbent-UF can be a promising advanced water treatment technology and a realistic alternative to conventional systems.

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