Influence of coexisting Cr(VI) and sulfate anions and Cu(II) on the sorption of F-53B to soils. (February 2019)

• Record Type: Journal Article
• Authors: Wei, Changlong; Song, Xin; Wang, Qing; Liu, Yun; Lin, Na
• Is Part Of: Chemosphere. Volume 216(2019)
• Page Start: 507
• Page End: 515
• Publication Date: 2019-02
• Subjects: F-53B -- Soil sorption -- Transport -- Copper -- Chromium; Pollution -- Periodicals; Pollution -- Physiological effect -- Periodicals; Environmental sciences -- Periodicals; Atmospheric chemistry -- Periodicals; 551.511
• DOI: 10.1016/j.chemosphere.2018.10.098
• Languages: English
• ISSNs: 0045-6535

Abstract

Abstract: 6:2 chlorinated polyfluorinated ether sulfonate (trade name F-53B), a perfluorooctane sulfonate alternative used as a mist suppressant in the chromium plating industry, is environmentally persistent and bioaccumulative. In this study, the kinetic and equilibrium data of F-53B sorption onto soils were obtained to investigate the relationship between sorption parameters and soil attributes. The effects of potential coexisting Cu(II), anionic Cr(VI) and sulfate on F-53B sorption by soils were explored. This is the first report of the effects of F-53B sorption behavior on soils with coexisting contaminants of Cu(II) and Cr(VI). The results showed that sorption kinetics of F-53B on soils could be well-fitted by the pseudo-second-order model. The maximum F-53B sorption capacity ranged from 22.71 to 92.36 mg/kg on six different soils, and the correlation analysis indicated a positive relationship between the maximum sorption capacity and the soil organic content, Al2 O3, and Fe2 O3 . The desorption percentages of F-53B in this study, defined as the proportion of sorbed F-53B on soils that was recovered upon desorption, were lower than 8.2%. Moreover, F-53B sorption capacities generally decreased in the presence of Cu(II), Cr(VI), and sulfate, indicating that these ions can facilitate the F-53B mobility in the subsurface. Taken together, these findings suggest that electrostatic interaction, hydrophobic interaction, ligand exchange, and surface complexation contributed to the F-53B sorption on soils. Highlights: F-53B sorption kinetics on soils can be described by the pseudo-second-order model. Soil organic content, Al2 O3 and Fe2 O3 played an important role for F-53B sorption. Sorption of F-53B on soils was highly irreversible. Cr(VI), sulfate and Cu(II) facilitated the mobility of F-53B in the subsurface.