{"title":"易于回收的聚丙烯酰胺/海藻酸钠/Fe3O4@ZIF-8 水凝胶磁珠可有效去除刚果红","authors":"Shuqi Li, Yaodong Liang, Qing Li, Yongjun He","doi":"10.1007/s10965-024-04195-x","DOIUrl":null,"url":null,"abstract":"<div><p>Direct discharge of Congo red (CR) dye wastewater can cause environmental pollution. Herein, magnetic polyacrylamide/sodium alginate/Fe<sub>3</sub>O<sub>4</sub>@ZIF-8 (PAM/SA/Fe<sub>3</sub>O<sub>4</sub>@ZIF-8) hydrogel beads with semi-interpenetrating polymer network (SIPN) structure were prepared by combining the properties of PAM/SA hydrogel and Fe<sub>3</sub>O<sub>4</sub>@ZIF-8 for removal of CR. The magnetic hydrogel beads were characterized by SEM, EDS, FTIR, XRD, and BET. The effect of different factors on the adsorption of CR by magnetic hydrogel beads was investigated. The results showed that the addition of Fe<sub>3</sub>O<sub>4</sub>@ZIF-8 improved the adsorption capacity of PAM/SA hydrogel beads and the maximum adsorption amount of CR by magnetic PAM/SA/Fe<sub>3</sub>O<sub>4</sub>@ZIF-8-8 was 234.69 mg g<sup>−1</sup>. The adsorption of CR on PAM/SA/Fe<sub>3</sub>O<sub>4</sub>@ZIF-8-8 complied with the Pseudo-second-order kinetic model and Freundlich model. Thermodynamic analyses indicated that the adsorption process was endothermic and spontaneous. The adsorption mechanism of PAM/SA/Fe<sub>3</sub>O<sub>4</sub>@ZIF-8 on CR was based on electrostatic attraction, metal coordination, hydrogen bonding, and π-π stacking. PAM/SA/Fe<sub>3</sub>O<sub>4</sub>@ZIF-8-8 had excellent selective adsorption and cyclic regeneration performance for CR removal. This study showed that magnetic PAM/SA/Fe<sub>3</sub>O<sub>4</sub>@ZIF-8 hydrogel beads can be used as a new effective adsorbent for the recovery of CR in wastewater.</p></div>","PeriodicalId":658,"journal":{"name":"Journal of Polymer Research","volume":"31 12","pages":""},"PeriodicalIF":2.6000,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Easily recyclable magnetic polyacrylamide/sodium alginate/Fe3O4@ZIF-8 hydrogel beads for effective removal of Congo Red\",\"authors\":\"Shuqi Li, Yaodong Liang, Qing Li, Yongjun He\",\"doi\":\"10.1007/s10965-024-04195-x\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Direct discharge of Congo red (CR) dye wastewater can cause environmental pollution. Herein, magnetic polyacrylamide/sodium alginate/Fe<sub>3</sub>O<sub>4</sub>@ZIF-8 (PAM/SA/Fe<sub>3</sub>O<sub>4</sub>@ZIF-8) hydrogel beads with semi-interpenetrating polymer network (SIPN) structure were prepared by combining the properties of PAM/SA hydrogel and Fe<sub>3</sub>O<sub>4</sub>@ZIF-8 for removal of CR. The magnetic hydrogel beads were characterized by SEM, EDS, FTIR, XRD, and BET. The effect of different factors on the adsorption of CR by magnetic hydrogel beads was investigated. The results showed that the addition of Fe<sub>3</sub>O<sub>4</sub>@ZIF-8 improved the adsorption capacity of PAM/SA hydrogel beads and the maximum adsorption amount of CR by magnetic PAM/SA/Fe<sub>3</sub>O<sub>4</sub>@ZIF-8-8 was 234.69 mg g<sup>−1</sup>. The adsorption of CR on PAM/SA/Fe<sub>3</sub>O<sub>4</sub>@ZIF-8-8 complied with the Pseudo-second-order kinetic model and Freundlich model. Thermodynamic analyses indicated that the adsorption process was endothermic and spontaneous. The adsorption mechanism of PAM/SA/Fe<sub>3</sub>O<sub>4</sub>@ZIF-8 on CR was based on electrostatic attraction, metal coordination, hydrogen bonding, and π-π stacking. PAM/SA/Fe<sub>3</sub>O<sub>4</sub>@ZIF-8-8 had excellent selective adsorption and cyclic regeneration performance for CR removal. This study showed that magnetic PAM/SA/Fe<sub>3</sub>O<sub>4</sub>@ZIF-8 hydrogel beads can be used as a new effective adsorbent for the recovery of CR in wastewater.</p></div>\",\"PeriodicalId\":658,\"journal\":{\"name\":\"Journal of Polymer Research\",\"volume\":\"31 12\",\"pages\":\"\"},\"PeriodicalIF\":2.6000,\"publicationDate\":\"2024-11-27\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Polymer Research\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10965-024-04195-x\",\"RegionNum\":4,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"POLYMER SCIENCE\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Polymer Research","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s10965-024-04195-x","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"POLYMER SCIENCE","Score":null,"Total":0}
Easily recyclable magnetic polyacrylamide/sodium alginate/Fe3O4@ZIF-8 hydrogel beads for effective removal of Congo Red
Direct discharge of Congo red (CR) dye wastewater can cause environmental pollution. Herein, magnetic polyacrylamide/sodium alginate/Fe3O4@ZIF-8 (PAM/SA/Fe3O4@ZIF-8) hydrogel beads with semi-interpenetrating polymer network (SIPN) structure were prepared by combining the properties of PAM/SA hydrogel and Fe3O4@ZIF-8 for removal of CR. The magnetic hydrogel beads were characterized by SEM, EDS, FTIR, XRD, and BET. The effect of different factors on the adsorption of CR by magnetic hydrogel beads was investigated. The results showed that the addition of Fe3O4@ZIF-8 improved the adsorption capacity of PAM/SA hydrogel beads and the maximum adsorption amount of CR by magnetic PAM/SA/Fe3O4@ZIF-8-8 was 234.69 mg g−1. The adsorption of CR on PAM/SA/Fe3O4@ZIF-8-8 complied with the Pseudo-second-order kinetic model and Freundlich model. Thermodynamic analyses indicated that the adsorption process was endothermic and spontaneous. The adsorption mechanism of PAM/SA/Fe3O4@ZIF-8 on CR was based on electrostatic attraction, metal coordination, hydrogen bonding, and π-π stacking. PAM/SA/Fe3O4@ZIF-8-8 had excellent selective adsorption and cyclic regeneration performance for CR removal. This study showed that magnetic PAM/SA/Fe3O4@ZIF-8 hydrogel beads can be used as a new effective adsorbent for the recovery of CR in wastewater.
期刊介绍：
Journal of Polymer Research provides a forum for the prompt publication of articles concerning the fundamental and applied research of polymers. Its great feature lies in the diversity of content which it encompasses, drawing together results from all aspects of polymer science and technology.
As polymer research is rapidly growing around the globe, the aim of this journal is to establish itself as a significant information tool not only for the international polymer researchers in academia but also for those working in industry. The scope of the journal covers a wide range of the highly interdisciplinary field of polymer science and technology, including:
polymer synthesis;
polymer reactions;
polymerization kinetics;
polymer physics;
morphology;
structure-property relationships;
polymer analysis and characterization;
physical and mechanical properties;
electrical and optical properties;
polymer processing and rheology;
application of polymers;
supramolecular science of polymers;
polymer composites.
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