Document Detail

Comparison of the sorption behaviors and mechanisms of perfluorosulfonates and perfluorocarboxylic acids on three kinds of clay minerals.
MedLine Citation:
PMID:  25113183     Owner:  NLM     Status:  In-Data-Review    
The sorption of four perfluoroalkyl acids (PFAAs) [perfluorooctane sulfonate (PFOS), perfluorohexane sulfonate (PFHxS), perfluorooctanoic acid (PFOA) and perfluorohexanoic acid (PFHxA)] on three typical minerals [montmorillonite (MM), kaolinite (KL) and hematite (HM)] was studied. The sorption of PFOS and PFHxS was much stronger than PFOA and PFHxA. The sorption of each PFAA on the minerals followed an order of HM>KL>MM, even though MM was positively while KL and HM were negatively charged, implying that the sorption is driven by some other interactions besides electrostatic attraction. The sorption decreased with an increase in pH and a decrease in ionic strength of the solution, and their impacts on PFOS were much stronger than other three PFAAs. Surface complexing and hydrogen-bonding could make great contributions to the sorption of PFOS on the minerals. The results are important for understanding the transport and fate of PFAAs in sediment and ground water.
Lixia Zhao; Jingna Bian; Yahui Zhang; Lingyan Zhu; Zhengtao Liu
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Publication Detail:
Type:  Journal Article     Date:  2014-05-08
Journal Detail:
Title:  Chemosphere     Volume:  114     ISSN:  1879-1298     ISO Abbreviation:  Chemosphere     Publication Date:  2014 Nov 
Date Detail:
Created Date:  2014-08-12     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0320657     Medline TA:  Chemosphere     Country:  England    
Other Details:
Languages:  eng     Pagination:  51-8     Citation Subset:  IM    
Copyright Information:
Copyright © 2014 Elsevier Ltd. All rights reserved.
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