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- Title
Role of Dissolved Organic Matter in Sorption of Perfluorooctanoic Acid to Metal Oxides.
- Authors
Kai-Hsing Yang; Ci-Jie Ruan; Yen-Ching Lin; Meng-Der Fang; Chung-Hsin Wu; Pui-Kwan Andy Hong; Cheng-Fang Lin
- Abstract
Perfluorooctanoic acid (PFOA) is an important perfluorinated chemical of significant environmental concern. It has been widely found at high concentrations in the environment. We have exposed sediment constituent minerals SiO2, Fe2O3, and A12O3 to PFOA and humic acid (HA) and studied the adsorption of PFOA by introducing the adsorbates in different orders. The results suggest concurrent sorption of PFOA and HA to the mineral surface or enhanced PFOA sorption when both are introduced to the aqueous phase. However, when PFOA is introduced to the mineral surface that has already been exposed to and extensively coated with HA, little PFOA adsorption occurs, which implies that PFOA released to rivers rich in dissolved organic matter (DOM, i.e. HA) may be immune to sorptive retention by the sediment and be transported downstream unabated. DOM thus can play a significant role in the transport and fate of PFOA in the natural water system. Water Environ. Res., 88, 779 (2016).
- Subjects
DISSOLVED organic matter; PERFLUOROOCTANOIC acid -- Environmental aspects; ADSORBATES; HUMIC acid; METALLIC oxides
- Publication
Water Environment Research (10614303), 2016, Vol 88, Issue 8, p779
- ISSN
1061-4303
- Publication type
Article
- DOI
10.2175/106143016X14609975747243