Health & Environmental Research Online (HERO)


Per- and Polyfluoroalkyl Substances (PFAS)


1,557 References Were Found:

The "refereed" or "peer review" status of a journal comes from the Ulrichsweb Global Serials Directory (http://ulrichsweb.serialssolutions.com/), as supplied by the publisher. The term refers to the system of critical evaluation of manuscripts/articles by professional colleagues or peers. The content of refereed publications is sanctioned, vetted, or otherwise approved by a peer-review or editorial board. The peer-review and evaluation system is utilized to protect, maintain, and raise the quality of scholarly material published in serials. Publications subject to the referee process are assumed, then, to contain higher quality content than those that are not.
Peer Reviewed Journal Article

Experimental determination of Henry's law constant of perfluorooctanoic acid (PFOA) at 298K by means of an inert-gas stripping method with a helical plate: Supplementary materials

Authors: Kutsuna, S; Hori, H (2008) Atmospheric Environment 42. [Supplemental Data] HERO ID: 3986419

Abstract: Supplementary materials

The "refereed" or "peer review" status of a journal comes from the Ulrichsweb Global Serials Directory (http://ulrichsweb.serialssolutions.com/), as supplied by the publisher. The term refers to the system of critical evaluation of manuscripts/articles by professional colleagues or peers. The content of refereed publications is sanctioned, vetted, or otherwise approved by a peer-review or editorial board. The peer-review and evaluation system is utilized to protect, maintain, and raise the quality of scholarly material published in serials. Publications subject to the referee process are assumed, then, to contain higher quality content than those that are not.
Peer Reviewed Journal Article

Experimental determination of Henry's law constant of perfluorooctanoic acid (PFOA) at 298K by means of an inert-gas stripping method with a helical plate

Authors: Kutsuna, S; Hori, H (2008) Atmospheric Environment 42:8883-8892. HERO ID: 611253

[Less] The Henry''s law constant (K H) of perfluorooctanoic acid (PFOA, C7F15C(O)OH) was determined at 298K . . . [More] The Henry''s law constant (K H) of perfluorooctanoic acid (PFOA, C7F15C(O)OH) was determined at 298K in aqueous sulfuric acid solutions and in aqueous sodium chloride and sulfuric acid mixtures by an inert-gas stripping method in which a helical plate was used to increase the residence time of the gas bubbles in the solutions. The partial pressures of C7F15C(O)OH in the purge gas (P PFOA) were determined by means of Fourier-transform infrared spectroscopy. Time-courses of P PFOA and concentrations of PFOA in the test solutions (C PFOA) differed from those typically obtained by an inert-gas stripping, indicating both the presence of C7F15C(O)OH aggregates, even at low concentrations of C7F15C(O)OH in aqueous sulfuric acid solutions, and the adsorption of gaseous C7F15C(O)OH on the walls of the experimental apparatus. We derived overall gas-to-water partition coefficients (K H′) by simulating the time-courses of P PFOA and C PFOA simultaneously to optimize parameters of the model relating to the partitioning, the aggregation, and the adsorption. The K H′ value for 0.31moldm−3 sulfuric acid solutions at 298K was determined at 3.8±0.1moldm−3 atm−1. From the relationship between K H′ and the ionic strength of aqueous sulfuric acid solutions, the K H values of C7F15C(O)OH at 298K were determined at 9.9±1.5moldm−3 atm−1 for pK a =2.8 and 5.0±0.2moldm−3 atm−1 for pK a =1.3. The pK a value of 1.3 seems to be most probable among the reported three values for C7F15C(O)OH, taking into account dependence of K H′ on... [Copyright 2008 Elsevier] Copyright of Atmospheric Environment is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts)

Technical Report
Technical Report

Draft risk assessment of the potential human health effects associated with exposure to perfluorooctanoic acid and its salts [SAB review draft]

Author: U.S. EPA (2005) Office of Toxic Substances, Office of Pollution Prevention and Toxics. HERO ID: 1332679


The "refereed" or "peer review" status of a journal comes from the Ulrichsweb Global Serials Directory (http://ulrichsweb.serialssolutions.com/), as supplied by the publisher. The term refers to the system of critical evaluation of manuscripts/articles by professional colleagues or peers. The content of refereed publications is sanctioned, vetted, or otherwise approved by a peer-review or editorial board. The peer-review and evaluation system is utilized to protect, maintain, and raise the quality of scholarly material published in serials. Publications subject to the referee process are assumed, then, to contain higher quality content than those that are not.
Peer Reviewed Journal Article

Vapor pressures of perfluorooctanoic, -nonanoic, -decanoic, -undecanoic, and -dodecanoic acids

Authors: Kaiser, MA; Larsen, BS; Kao, CPC; Buck, RC (2005) Journal of Chemical and Engineering Data 50:1841-1843. HERO ID: 3858963

[Less] A dynamic method was used to determine the vapor pressures of perfluorooctanoic, -nonanoic, -decanoic, . . . [More] A dynamic method was used to determine the vapor pressures of perfluorooctanoic, -nonanoic, -decanoic, -undecanoic, and -dodecanoic acids. Measurements were made over the temperature range from (59.25 to 190.80) degrees C for perfluorooctanoic acid, from (99.63 to 203.12) degrees C for perfluorononanoic acid, from (129.56 to 218.88) degrees C for perfluorodecanoic acid, from (112.04 to 237.65) degrees C for perfluoroundecanoic acid, and from (127.58 to 247.36) degrees C for perfluorododecanoic acid. Pressures ranged from (0.128 to 96.50) kPa for perfluorooctanoic acid, from (1.12 to 99.97) kPa for perfluorononanoic acid, from (3.129 to 99. 97) kPa for perfluorodecanoic acid, from (0.616 to 99.97) kPa for perfluoroundecanoic acid, and from (0.856 to 99.96) kPa for perfluorododecanoic acid. A sealed vial experiment demonstrated that perfluorooctanoic acid sublimes at room temperature.

Technical Report
Technical Report

Environmental Risk Evaluation Report: Perfluorooctanesulphonate (PFOS)

Authors: Brooke, D; Footitt, A; Nwaogu TA (2004) Environment Agency, UK. HERO ID: 3982554


Technical Report
Technical Report

Environmental and health assessment of perfluorooctane sulfonic acid and its salts

Author: 3M (2003) HERO ID: 3982553


Book/Book Chapter
Book/ Chapter

Fluorine-containing polymers, perfluoroalkanesulfonic acids

Author: Savu, P (2000) In Kirk-Othmer encyclopedia of chemical technology. New York, NY: John Wiley & Sons. HERO ID: 3980852

[Less] Perfluoroalkanesulfonic acids and their derivatives are of commercial significance because of their . . . [More] Perfluoroalkanesulfonic acids and their derivatives are of commercial significance because of their unusual acid strength, chemical stability, and the surface activity of the higher members of the series (eight carbons and larger). The best method of preparation is via the perfluorinated sulfonyl fluorides derived from electrochemical fluorination, although other methods including direct fluorination with fluorine gas are known. The first member of the series, trifluoromethanesulfonic acid, is one of the strongest acids known. Alkyl esters of trifluoromethanesulfonic acid are among the best leaving groups known and are commonly used in that capacity in displacement reactions. Lithium trifluoromethanesulfonate solutions are very conductive and can find application as electrolytes in primary lithium batteries and as antistats for films.

Derivatives of the longer-chain perfluoroalkanesulfonic acids have a number of unique surface-active properties and have formed a basis for a number of commercial products. The longer-chain acids and their salts, particularly C8F17SO3H and higher, are surface-active agents in aqueous media. They reduce the surface tension of water to levels not possible with hydrocarbon surfactants. Preparation of difunctional perfluoroalkanesulfonates and their derivatives is discussed, including fluorosulfonylacetyl fluoride. Fluorosulfonyldifluoracetyl fluoride is an important industrial intermediate used in the production of Du Pont's Nafion ion-exchange membranes and in many other applications.