Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/162198
Title: Highly selective recovery of perfluorooctanoic acid from semiconductor wastewater via adsorption on pH-stimulated poly (dimethyl amino) ethyl methacrylate microgels
Authors: Bao, Yueping
Gupta, Nupur
Chuah, Chong Yang
Liang, Yen Nan
Hu, Chun Po
Hu, Xiao
Keywords: Engineering::Environmental engineering
Issue Date: 2022
Source: Bao, Y., Gupta, N., Chuah, C. Y., Liang, Y. N., Hu, C. P. & Hu, X. (2022). Highly selective recovery of perfluorooctanoic acid from semiconductor wastewater via adsorption on pH-stimulated poly (dimethyl amino) ethyl methacrylate microgels. Separation and Purification Technology, 287, 120479-. https://dx.doi.org/10.1016/j.seppur.2022.120479
Journal: Separation and Purification Technology
Abstract: Perfluorooctanoic acid (PFOA) is a high-value chemical which has been widely used in the semiconductor industry. There is currently a lot of work focusing on the removal of low concentration of PFOA due to its potential toxicity, whereas the recovery of high concentration of PFOA from semiconductor wastewater via adsorption could be more valuable. This work reported a novel pH-stimulated poly (dimethyl amino) ethyl methacrylate (PDMAEMA) microgel for selective PFOA recovery. The results showed that the calculated maximum adsorption capacity for PFOA on PDMAEMA microgel is as high as 2632 mg g−1 in the presence of 5% (v/v) isopropyl alcohol (IPA). Electrostatic interaction was considered as the main adsorption mechanism combined with hydrophobic interactions. The strong interactions made the adsorption highly selective; therefore, the components in the water matrix, including acids, metal ions, and organic solvents, would not affect the adsorption performance. Meanwhile, due to the pH responsiveness of PDMAEMA microgels, PFOA could be released easily when the solution pH was adjusted to higher values. Finally, the application mode was investigated by incorporating PDMAEMA microgels into a dense membrane, in which the separation of the microgels in a water system could be effectively achieved.
URI: https://hdl.handle.net/10356/162198
ISSN: 1383-5866
DOI: 10.1016/j.seppur.2022.120479
Rights: © 2022 Elsevier B.V. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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