Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/118606
Title: REMOVAL OF PHARMACEUTICALS BY IRON OXIDE AND MANGANESE OXIDE COATED SANDS IN BIORENTENTION COLUMN REACTORS
Authors: HE BEI
Keywords: Bioretention System, Pharmaceuticals, Metal-oxide Coated Sands, Kinetic Study, Batch Experiments, Column Experiments
Issue Date: 11-Aug-2014
Citation: HE BEI (2014-08-11). REMOVAL OF PHARMACEUTICALS BY IRON OXIDE AND MANGANESE OXIDE COATED SANDS IN BIORENTENTION COLUMN REACTORS. ScholarBank@NUS Repository.
Abstract: This study is designed to investigate performance and mechanism of bioretention facilities in Pharmaceuticals and Personal Care Products (PPCPs) reduction. In batch experiments, iron oxide coated sands (IOCS) and manganese oxide coated sands (MOCS) showed better removal efficiency than silicon sands. Adsorption isotherms were well fitted using Langmuir model. PPCP removal decreased when pH higher than pHPZC, suggesting it was mainly controlled by adsorbent surface charge. The dominant contribution of removal was attributed to oxidation process. In bioretention column experiments, adsorption sites on adsorbent surface got saturated when concentrations of Caffeine (CF) and Ibuprofen (IBP) were up to 10 mg/L. Lower flow rates were demonstrated to increase removal by extending contact time. Breakthrough curves were well fitted using bed depth service time model. For CF and IBP removal by IOCS, the critical bed depths were 32.05 and 28.67 cm, while for MOCS they were 27.80 and 30.86 cm, respectively.
URI: http://scholarbank.nus.edu.sg/handle/10635/118606
Appears in Collections:Master's Theses (Open)

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