PMID- 32202791
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20200414
IS  - 1520-5827 (Electronic)
IS  - 0743-7463 (Linking)
VI  - 36
IP  - 14
DP  - 2020 Apr 14
TI  - On the Behavior of Perfluorinated Persistent Organic Pollutants (POPs) at 
      Environmentally Relevant Aqueous Interfaces: An Interplay of Hydrophobicity and 
      Hydrogen Bonding.
PG  - 3720-3729
LID - 10.1021/acs.langmuir.0c00189 [doi]
AB  - The behavior of perfluorinated persistent organic pollutants (POPs), especially 
      perfluoroalkyl carboxylic and sulfonic acids, at aqueous interfaces is crucial 
      for their transport and speciation in the environment and subsequent 
      immunotoxicity. Here, we investigate the surface prevalence and interfacial 
      interaction of a prototype perfluorinated-POP, perfluoroheptanoic acid (PFHA), 
      with environmentally relevant amphiphiles of varying hydrophobicity and head 
      groups (C(n)H(2n+1)-X; n: 8 vs 16; -X: -OH vs -COOH) using interface-selective 
      vibrational sum frequency generation (VSFG) spectroscopy. SFG intensity spectra 
      in the CH- and OH-stretch regions reveal that PFHA prevails at aqueous interfaces 
      that contain amphiphiles of intermediate chain length such as 1-octanol (n = 8) 
      and heptanoic acid (n = 6). PFHA partially expels as well as increases the alkyl 
      chain order of octanol on the water surface. Whereas heptanoic acid, though less 
      hydrophobic than octanol, is retained at the water surface through 
      hydrogen-bonding with the PFHA head group 
      (((PFHA))COO(-)...HOOC((heptanoic-acid))). Long chain amphiphiles (n = 16) such 
      as hexadecanol and palmitic acid expel PFHA from the water surface regardless of 
      the difference in their head groups. Interestingly, the dangling OH (3710 cm(-1)) 
      which is diminished at the hydrogenated-amphiphile-water interface is preserved 
      at the perfluorinated-POP-water interface.
FAU - Ghosh, Nishith
AU  - Ghosh N
FAU - Roy, Subhadip
AU  - Roy S
FAU - Mondal, Jahur A
AU  - Mondal JA
AUID- ORCID: 0000-0002-6536-787X
LA  - eng
PT  - Journal Article
DEP - 20200331
PL  - United States
TA  - Langmuir
JT  - Langmuir : the ACS journal of surfaces and colloids
JID - 9882736
SB  - IM
EDAT- 2020/03/24 06:00
MHDA- 2020/03/24 06:01
CRDT- 2020/03/24 06:00
PHST- 2020/03/24 06:00 [pubmed]
PHST- 2020/03/24 06:01 [medline]
PHST- 2020/03/24 06:00 [entrez]
AID - 10.1021/acs.langmuir.0c00189 [doi]
PST - ppublish
SO  - Langmuir. 2020 Apr 14;36(14):3720-3729. doi: 10.1021/acs.langmuir.0c00189. Epub 
      2020 Mar 31.