{"title":"A novel hierarchical porous polyHIPE/Fe3O4 nanocomposite foam functionalized by 1-vinylimidazole for Fe2+ removal from aqueous solutions","authors":"Y. Farahat, M. R. Moghbeli, H. Karimian","doi":"10.1007/s13762-024-06268-2","DOIUrl":null,"url":null,"abstract":"<div><p>Highly open porous poly(styrene-co-divinylbenzene) polyHIPE foam was successfully synthesized and then functionalized by different percentages of 1-vinylimidazole co-monomer. Fe<sub>3</sub>O<sub>4</sub> nanoparticles were synthesized and incorporated in the functionalized polyHIPE foams to enhance Fe<sup>2+</sup> removal efficiency from aqueous solutions. The co-monomer in the functionalized and functionalized/Fe<sub>3</sub>O<sub>4</sub> nanocomposite foams is well-suited to enhance Fe<sup>2+</sup> removal efficiency. The adsorption efficiency of the 1-vinylimidazole-functionalized polyHIPE foams increased with increasing 1-vinylimidazole percentage. The kinetic studies showed a pseudo-second-order adsorption kinetics at different co-monomer concentrations. The nanocomposite foam containing 10, 20, 30 wt% Fe<sub>3</sub>O<sub>4</sub> removed 79.01, 84.03, and 72.56% of Fe<sup>2+</sup> ions, respectively. The 1-vinylimidazole@PolyHIPE/20 wt% Fe<sub>3</sub>O<sub>4</sub> nanocomposite with the highest Fe<sup>2+</sup> removal capacity was selected for further adsorption studies. The Fe<sup>2+</sup> removal efficiency by this nanocomposite foam was investigated at different pHs, adsorbent dosages, and initial Fe<sup>2+</sup> concentrations using the response surface method (RSM) experimental design. In addition to aqueous solutions containing only Fe<sup>2+</sup> ions, the Fe<sup>2+</sup> removal efficiency was evaluated in the presence of Ni<sup>2+</sup>, Cr<sup>3+</sup>, Cr<sup>6+</sup>, Zn<sup>2+</sup>, and Pb<sup>2+</sup> for comparison purposes. These competing metal ions in the solution decreased the Fe<sup>2+</sup> removal efficiency from 84.03 to 77.20%. The adsorption isotherms were best fitted to the Langmuir equation, indicating the adsorption of a monolayer of Fe<sup>2+</sup> ions on the polyHIPE walls.</p></div>","PeriodicalId":589,"journal":{"name":"International Journal of Environmental Science and Technology","volume":"22 7","pages":"5697 - 5712"},"PeriodicalIF":3.0000,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Environmental Science and Technology","FirstCategoryId":"93","ListUrlMain":"https://link.springer.com/article/10.1007/s13762-024-06268-2","RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
引用次数: 0
Abstract
Highly open porous poly(styrene-co-divinylbenzene) polyHIPE foam was successfully synthesized and then functionalized by different percentages of 1-vinylimidazole co-monomer. Fe3O4 nanoparticles were synthesized and incorporated in the functionalized polyHIPE foams to enhance Fe2+ removal efficiency from aqueous solutions. The co-monomer in the functionalized and functionalized/Fe3O4 nanocomposite foams is well-suited to enhance Fe2+ removal efficiency. The adsorption efficiency of the 1-vinylimidazole-functionalized polyHIPE foams increased with increasing 1-vinylimidazole percentage. The kinetic studies showed a pseudo-second-order adsorption kinetics at different co-monomer concentrations. The nanocomposite foam containing 10, 20, 30 wt% Fe3O4 removed 79.01, 84.03, and 72.56% of Fe2+ ions, respectively. The 1-vinylimidazole@PolyHIPE/20 wt% Fe3O4 nanocomposite with the highest Fe2+ removal capacity was selected for further adsorption studies. The Fe2+ removal efficiency by this nanocomposite foam was investigated at different pHs, adsorbent dosages, and initial Fe2+ concentrations using the response surface method (RSM) experimental design. In addition to aqueous solutions containing only Fe2+ ions, the Fe2+ removal efficiency was evaluated in the presence of Ni2+, Cr3+, Cr6+, Zn2+, and Pb2+ for comparison purposes. These competing metal ions in the solution decreased the Fe2+ removal efficiency from 84.03 to 77.20%. The adsorption isotherms were best fitted to the Langmuir equation, indicating the adsorption of a monolayer of Fe2+ ions on the polyHIPE walls.
期刊介绍：
International Journal of Environmental Science and Technology (IJEST) is an international scholarly refereed research journal which aims to promote the theory and practice of environmental science and technology, innovation, engineering and management.
A broad outline of the journal''s scope includes: peer reviewed original research articles, case and technical reports, reviews and analyses papers, short communications and notes to the editor, in interdisciplinary information on the practice and status of research in environmental science and technology, both natural and man made.
The main aspects of research areas include, but are not exclusive to; environmental chemistry and biology, environments pollution control and abatement technology, transport and fate of pollutants in the environment, concentrations and dispersion of wastes in air, water, and soil, point and non-point sources pollution, heavy metals and organic compounds in the environment, atmospheric pollutants and trace gases, solid and hazardous waste management; soil biodegradation and bioremediation of contaminated sites; environmental impact assessment, industrial ecology, ecological and human risk assessment; improved energy management and auditing efficiency and environmental standards and criteria.
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