Next Article in Journal
Response and Modeling of Hybrid Maize Seed Vigor to Water Deficit at Different Growth Stages
Previous Article in Journal
Comparison of NCEP-CFSR and CMADS for Hydrological Modelling Using SWAT in the Muda River Basin, Malaysia
Article

The Adsorption Selectivity of Short and Long Per- and Polyfluoroalkyl Substances (PFASs) from Surface Water Using Powder-Activated Carbon

1
Water Quality Institute, Busan Water Authority, Gimhae 50804, Korea
2
Department of Civil Engineering, Sangmyung University, Cheonan 31066, Korea
3
Environmental Program, Department of Civil Engineering, Auburn University, Auburn, AL 36849, USA
*
Author to whom correspondence should be addressed.
Water 2020, 12(11), 3287; https://doi.org/10.3390/w12113287
Received: 22 October 2020 / Revised: 18 November 2020 / Accepted: 20 November 2020 / Published: 23 November 2020
(This article belongs to the Section Wastewater Treatment and Reuse)
Nine per- and polyfluoroalkyl substances (PFASs), including six perfluoroalkyl carboxylic acids (PFCAs) and three perfluoroalkyl sulfonic acids (PFSAs), were tested to find their adsorption selectivity from surface water and the feasibility of the powder activated carbon (PAC) process between the perchlorination and coagulation processes by operating parameters such as mixing intensity, dosage, contact time, initial pH, and concentration of perchlorination. The removal efficiency of four types of PAC revealed that the coal-based activated carbon was clearly advanced for all of the PFASs, and the thermal regenerated PAC did not exhibit a significant reduction in adsorption capacity. The longer carbon chain or the higher molecular weight (MW) obtained a higher adsorption capacity and the MW exhibited a more proportional relationship with the removal efficiency than the carbon chain number, regardless of the PFCA and PFSA species. Approximately 80% and 90% equilibria were accomplished within 60 and 120 min for the long chain carbon PFAS, respectively, while for the short chain PFAS, 240 min was required to reach 85% equilibrium. The effect of mixing intensity (rpm) was not considered for the removal of the PFAS, although it was relatively influenced in the short PFAS species. Due to the surface charge of the PAC and the properties of protonation of the PFASs, the acid condition increased the PFASs’ adsorption capacity. The prechlorination decreased the removal efficiency, and the reduction rate was more significantly influenced for the short chain PFAS than for the long chain PFAS. View Full-Text
Keywords: PFASs; adsorption; powder activated carbon; selectivity PFASs; adsorption; powder activated carbon; selectivity
Show Figures

Figure 1

MDPI and ACS Style

Son, H.; Kim, T.; Yoom, H.-S.; Zhao, D.; An, B. The Adsorption Selectivity of Short and Long Per- and Polyfluoroalkyl Substances (PFASs) from Surface Water Using Powder-Activated Carbon. Water 2020, 12, 3287. https://doi.org/10.3390/w12113287

AMA Style

Son H, Kim T, Yoom H-S, Zhao D, An B. The Adsorption Selectivity of Short and Long Per- and Polyfluoroalkyl Substances (PFASs) from Surface Water Using Powder-Activated Carbon. Water. 2020; 12(11):3287. https://doi.org/10.3390/w12113287

Chicago/Turabian Style

Son, Heejong; Kim, Taehoon; Yoom, Hoon-Sik; Zhao, Dongye; An, Byungryul. 2020. "The Adsorption Selectivity of Short and Long Per- and Polyfluoroalkyl Substances (PFASs) from Surface Water Using Powder-Activated Carbon" Water 12, no. 11: 3287. https://doi.org/10.3390/w12113287

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop