Insight into the ion exchange in the adsorptive removal of fluoride by doped polypyrrole from water
| العنوان: | Insight into the ion exchange in the adsorptive removal of fluoride by doped polypyrrole from water |
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| المؤلفون: | Juantao Zhang, Zhenyu Wang, Yunpeng Liu, Wei Yan, Xuyang Zhao, Wenlong Zhang, Jiangtao Feng |
| المصدر: | Environmental Science and Pollution Research. 28:67267-67279 |
| بيانات النشر: | Springer Science and Business Media LLC, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Ion exchange, Health, Toxicology and Mutagenesis, Langmuir adsorption model, General Medicine, Polypyrrole, Pollution, symbols.namesake, chemistry.chemical_compound, Adsorption, Polymerization, X-ray photoelectron spectroscopy, chemistry, Zeta potential, symbols, Environmental Chemistry, Fluoride, Nuclear chemistry |
| الوصف: | In this study, the polypyrrole (PPy) samples doped with Cl- (PPy-Cl), SO42- (PPy-SO4) and SO42-+Cl- (PPy-SO4+Cl) were synthesized by chemical polymerization for the adsorptive removal of fluoride ion from water. The structure and morphology of the as-prepared PPy samples were characterized by FT-IR, BET, SEM, XPS, and zeta potential. The adsorption experiments revealed that the PPy-Cl exhibited faster kinetics and higher adsorption capacity (13.98 mg/g), more than 4 times that of PPy-SO4 (3.08 mg/g) and PPy-SO4+Cl (3.17 mg/g). The kinetics of the adsorption followed the pseudo-second-order model and the adsorption isotherm data fitted well to the Langmuir model. FT-IR, EDX, and XPS tests for PPy samples before and after fluoride adsorption demonstrated that anion exchange between F- and Cl- or SO42- was the prior mechanism for fluoride ion removal from water. Cl- was more favorable than SO42- in the ion exchange with F-. Meanwhile, the Cl- or SO42- exchanged with F- was mainly bound to the active nitrogen that accounts for 6% of the total nitrogen in PPy molecular matrix. Further study of zeta potential and pH influence experiment demonstrated the electrostatic interaction is auxiliary interaction for the fluoride removal by doped PPy samples. |
| تدمد: | 1614-7499 0944-1344 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::9baa4c299c12a3895decaec0ffd15456 https://doi.org/10.1007/s11356-021-15027-6 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........9baa4c299c12a3895decaec0ffd15456 |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Springer Verlag. | تدمد: | 16147499 09441344 |
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