Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/22135
Title: Occurrence and fate of perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) in water and wastewater and their removal using hybrid PAC-MBR system
Authors: YU JING
Keywords: PFOS, PFOA, Aquatic environment, Sewage treatment plant (STP), Hybrid powdered activated carbon-membrane biological reactor, Fate and behavior
Issue Date: 16-Aug-2010
Source: YU JING (2010-08-16). Occurrence and fate of perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) in water and wastewater and their removal using hybrid PAC-MBR system. ScholarBank@NUS Repository.
Abstract: Occurrence and fate of PFOS and PFOA in the aquatic environment and sewage treatment plants (STPs) were studied. PFOS concentrations in surface waters, wastewaters and coastal waters were in the range of 2.2-87.3 ng/L, 5.8-532 ng/L and 1.9-8.9 ng/L, respectively, while those of PFOA were 5.7-91.5 ng/L, 7.9-1060 ng/L, 2.4-17.8 ng/L, respectively. In addition, the behavior of PFOS and PFOA in STPs was explored by analyzing their mass changes in biological units of two full-scale STPs. On the other hand, the adsorption of PFOS and PFOA onto powdered activated carbon (PAC) was investigated in the presence and absence of effluent organic matter (EfOM) at low concentration range (0.1-500 µg/L). Furthermore, removal of PFCs by hybrid PAC-MBR system were >90% for PFOS and >84% for PFOA at different SRT studied. Our result suggests that adsorption of PFOS and PFOA onto PAC could be dominant and removal efficiencies may be not significantly affected by different operational SRTs in PAC-MBR system studied.
URI: http://scholarbank.nus.edu.sg/handle/10635/22135
Appears in Collections:Ph.D Theses (Open)

Show full item record
Files in This Item:
File Description SizeFormatAccess SettingsVersion 
YuJ.pdf1.85 MBAdobe PDF

OPEN

NoneView/Download

Page view(s)

350
checked on Dec 11, 2017

Download(s)

184
checked on Dec 11, 2017

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.