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| Effects of polyamide on bisphenol A migration in groundwater |
| Received:July 24, 2022 |
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| KeyWord:microplastic;bisphenol A（BPA）;adsorption;migration;groundwater |
| Author Name | Affiliation | E-mail | | LIN Xuanhao | Guangdong Engineering Research Center of Environmental Pollution and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China | | | WU Ming | Guangdong Engineering Research Center of Environmental Pollution and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China | wumingnj@foxmail.com | | LU Guoping | Guangdong Engineering Research Center of Environmental Pollution and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China | | | CHENG Zhou | Guangdong Provincial Academy of Environmental Science, Guangzhou 510045, China | | | XIE Linjun | Guangdong Engineering Research Center of Environmental Pollution and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China | | | WU Yuheng | Guangdong Engineering Research Center of Environmental Pollution and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China | | | ZENG Yongjun | Guangdong Engineering Research Center of Environmental Pollution and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China | | | HAO Yanru | Guangdong Engineering Research Center of Environmental Pollution and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China | | | MO Cehui | Guangdong Engineering Research Center of Environmental Pollution and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China | |
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| Abstract: |
| In this study, the adsorption of the target pollutant bisphenol A（BPA）on the surface of the typical microplastic polyamide（PA） and the effect of PA on the migration of BPA in groundwater were investigated using batch and column experiments. Scanning electron microscopy and Fourier-transform infrared spectroscopy showed that the surface of PA had obvious changes after the adsorption experiment. The Langmuir model and Freundlich model could be used to simulate the isothermal adsorption process of BPA by PA. Simultaneously, kinetic adsorption could be fitted by a pseudo-first model, and the maximum adsorption capacity reached 13 mg·g-1. The results of the column experiments showed that the penetration rate of BPA decreased with the PA content and increased with flow velocity, while the initial concentration had no apparent influence on the recovery rate of BPA. In addition, due to the ionization of BPA, its recovery rate showed almost no change when the pH was < 10.2. When the pH was > 10.2, the recovery rate increased significantly, reaching 94%. More importantly, the ionic type and strength also had a significant influence on the migration of BPA in porous media containing PA. Here, Ca2+ had a significant inhibitory effect on BPA transport, while Na+ had no apparent effect on BPA migration. |
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