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Poster Presentations
Day 4, June 25（Wed.）
Room P (Maesato East, Foyer, Ocean Wing)
- 4P-PM-21
UPLC-MS/MS Analysis of PFAS for Evaluation of its Removal from Drinking Water with Granular Activated Carbon
(NTU EOHS)
oSiao-Tong Chen, Gen Shuh Wang
Per- and polyfluoroalkyl substances (PFAS) are persistent pollutants found in water, raising concerns about potential health risks. Conventional water treatment methods often struggle to effectively remove PFAS. This study investigates the use of granular activated carbon (GAC) to reduce PFAS concentrations in water treatment plants. Laboratory-scale simulations evaluated coconut shell- and coal-based GAC for their effectiveness in removing PFBS, PFHxS, PFOA, and PFOS.
The sample pretreatment step compared two solid-phase extraction (SPE) cartridges: HLB and WAX. Additionally, the study examined the effects of acidification, rinsing, and soaking on analyte recovery rates. Significant differences in recovery rates were observed based on these conditions, which facilitated the identification of optimal pretreatment strategies to enhance the accuracy and reliability of the analysis. Water samples were analyzed following Taiwan's LC-MS/MS Method (NIEA W542.52B), referencing U.S. EPA Methods 533 and 537.1. Sample pretreatment utilized an Oasis WAX 150 mg SPE cartridge, followed by UPLC-MS/MS analysis. This study integrates adsorption kinetics, isotherms, and Rapid Small Scale Column Tests (RSSCT) to optimize the efficiency of PFAS removal.