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Role of Dissolved Organic Matter in Sorption of Perfluorooctanoic Acid to Metal Oxides
Author(s) -
Yang KaiHsing,
Ruan CiJie,
Lin YenChing,
Fang MengDer,
Wu ChungHsin,
Hong PuiKwan Andy,
Lin ChengFang
Publication year - 2016
Publication title -
water environment research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.356
H-Index - 73
eISSN - 1554-7531
pISSN - 1061-4303
DOI - 10.2175/106143016x14609975747243
Subject(s) - perfluorooctanoic acid , sorption , environmental chemistry , chemistry , adsorption , dissolved organic carbon , humic acid , organic matter , sediment , organic chemistry , geology , paleontology , fertilizer
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 SiO 2 , Fe 2 O 3 , and Al 2 O 3 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.