Junbiao Peng , Weiheng Shu , Yuan Chen , Xiaoguo Ma
{"title":"聚乙烯亚胺功能化磁性硅纳米复合材料的制备及其对六价钼离子的快速去除和回收","authors":"Junbiao Peng , Weiheng Shu , Yuan Chen , Xiaoguo Ma","doi":"10.1016/j.jwpe.2025.108210","DOIUrl":null,"url":null,"abstract":"<div><div>Molybdenum is an expensive rare metal with many application, however discharged effluents containing Mo(VI) ions from various industries constitute potential hazards to human health and the ecosystem. Thus, it is demanded to develop appropriate methods to separate and recover molybdenum from industrial wastewater. In the present work, polyethyleneimine (PEI) functionalized magnetic silicon (PEI@SiO<sub>2</sub>@Fe<sub>3</sub>O<sub>4</sub>) nanocomposite was synthesized by a facile approach (60 °C, 1 h), and then for the first time used as the sorbent for efficient removal and recovery of Mo(VI) ions. The prepared PEI@SiO<sub>2</sub>@Fe<sub>3</sub>O<sub>4</sub> nanocomposite was then characterized using Fourier transform-infrared spectrometer, scanning electron microscoper, etc. Investigations of adsorption performances of the PEI@SiO<sub>2</sub>@Fe<sub>3</sub>O<sub>4</sub> demonstrated its high adsorption capacity of 409.8 mg/g at 298 K and fast adsorption kinetics with an equilibrium time of 45 min, while the sorption process was spontaneous, endothermic and well fitted by Langmuir isotherm and the pseudo-second order kinetic model. The possible adsorption mechanisms include coordinate bonds and electrostatic interaction. The sorbed Mo(VI) ions were completely eluated off from PEI@SiO<sub>2</sub>@Fe<sub>3</sub>O<sub>4</sub> sorbent using a Na<sub>3</sub>PO<sub>4</sub> solution (20 g/L) within only 2 min. Outstanding reusability of PEI@SiO<sub>2</sub>@Fe<sub>3</sub>O<sub>4</sub> was illustrated after seven adsorption–desorption cycles with only 7 % loss in sorption capacity. The PEI@SiO<sub>2</sub>@Fe<sub>3</sub>O<sub>4</sub> was then applied to the treatment of real wastewaters containing Mo(VI), and very satisfactory results were achieved. These results suggest that the PEI@SiO<sub>2</sub>@Fe<sub>3</sub>O<sub>4</sub> nanocomposite is a potential sorbent for removing and recovery of Mo(VI) from wastewater.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"76 ","pages":"Article 108210"},"PeriodicalIF":6.3000,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Facile synthesis of polyethyleneimine functionalized magnetic silicon nanocomposite for enhanced and rapid removal and recovery of hexavalent molybdenum ions\",\"authors\":\"Junbiao Peng , Weiheng Shu , Yuan Chen , Xiaoguo Ma\",\"doi\":\"10.1016/j.jwpe.2025.108210\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Molybdenum is an expensive rare metal with many application, however discharged effluents containing Mo(VI) ions from various industries constitute potential hazards to human health and the ecosystem. Thus, it is demanded to develop appropriate methods to separate and recover molybdenum from industrial wastewater. In the present work, polyethyleneimine (PEI) functionalized magnetic silicon (PEI@SiO<sub>2</sub>@Fe<sub>3</sub>O<sub>4</sub>) nanocomposite was synthesized by a facile approach (60 °C, 1 h), and then for the first time used as the sorbent for efficient removal and recovery of Mo(VI) ions. The prepared PEI@SiO<sub>2</sub>@Fe<sub>3</sub>O<sub>4</sub> nanocomposite was then characterized using Fourier transform-infrared spectrometer, scanning electron microscoper, etc. Investigations of adsorption performances of the PEI@SiO<sub>2</sub>@Fe<sub>3</sub>O<sub>4</sub> demonstrated its high adsorption capacity of 409.8 mg/g at 298 K and fast adsorption kinetics with an equilibrium time of 45 min, while the sorption process was spontaneous, endothermic and well fitted by Langmuir isotherm and the pseudo-second order kinetic model. The possible adsorption mechanisms include coordinate bonds and electrostatic interaction. The sorbed Mo(VI) ions were completely eluated off from PEI@SiO<sub>2</sub>@Fe<sub>3</sub>O<sub>4</sub> sorbent using a Na<sub>3</sub>PO<sub>4</sub> solution (20 g/L) within only 2 min. Outstanding reusability of PEI@SiO<sub>2</sub>@Fe<sub>3</sub>O<sub>4</sub> was illustrated after seven adsorption–desorption cycles with only 7 % loss in sorption capacity. The PEI@SiO<sub>2</sub>@Fe<sub>3</sub>O<sub>4</sub> was then applied to the treatment of real wastewaters containing Mo(VI), and very satisfactory results were achieved. These results suggest that the PEI@SiO<sub>2</sub>@Fe<sub>3</sub>O<sub>4</sub> nanocomposite is a potential sorbent for removing and recovery of Mo(VI) from wastewater.</div></div>\",\"PeriodicalId\":17528,\"journal\":{\"name\":\"Journal of water process engineering\",\"volume\":\"76 \",\"pages\":\"Article 108210\"},\"PeriodicalIF\":6.3000,\"publicationDate\":\"2025-06-24\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of water process engineering\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2214714425012826\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, CHEMICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of water process engineering","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2214714425012826","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
Facile synthesis of polyethyleneimine functionalized magnetic silicon nanocomposite for enhanced and rapid removal and recovery of hexavalent molybdenum ions
Molybdenum is an expensive rare metal with many application, however discharged effluents containing Mo(VI) ions from various industries constitute potential hazards to human health and the ecosystem. Thus, it is demanded to develop appropriate methods to separate and recover molybdenum from industrial wastewater. In the present work, polyethyleneimine (PEI) functionalized magnetic silicon (PEI@SiO2@Fe3O4) nanocomposite was synthesized by a facile approach (60 °C, 1 h), and then for the first time used as the sorbent for efficient removal and recovery of Mo(VI) ions. The prepared PEI@SiO2@Fe3O4 nanocomposite was then characterized using Fourier transform-infrared spectrometer, scanning electron microscoper, etc. Investigations of adsorption performances of the PEI@SiO2@Fe3O4 demonstrated its high adsorption capacity of 409.8 mg/g at 298 K and fast adsorption kinetics with an equilibrium time of 45 min, while the sorption process was spontaneous, endothermic and well fitted by Langmuir isotherm and the pseudo-second order kinetic model. The possible adsorption mechanisms include coordinate bonds and electrostatic interaction. The sorbed Mo(VI) ions were completely eluated off from PEI@SiO2@Fe3O4 sorbent using a Na3PO4 solution (20 g/L) within only 2 min. Outstanding reusability of PEI@SiO2@Fe3O4 was illustrated after seven adsorption–desorption cycles with only 7 % loss in sorption capacity. The PEI@SiO2@Fe3O4 was then applied to the treatment of real wastewaters containing Mo(VI), and very satisfactory results were achieved. These results suggest that the PEI@SiO2@Fe3O4 nanocomposite is a potential sorbent for removing and recovery of Mo(VI) from wastewater.
期刊介绍:
The Journal of Water Process Engineering aims to publish refereed, high-quality research papers with significant novelty and impact in all areas of the engineering of water and wastewater processing . Papers on advanced and novel treatment processes and technologies are particularly welcome. The Journal considers papers in areas such as nanotechnology and biotechnology applications in water, novel oxidation and separation processes, membrane processes (except those for desalination) , catalytic processes for the removal of water contaminants, sustainable processes, water reuse and recycling, water use and wastewater minimization, integrated/hybrid technology, process modeling of water treatment and novel treatment processes. Submissions on the subject of adsorbents, including standard measurements of adsorption kinetics and equilibrium will only be considered if there is a genuine case for novelty and contribution, for example highly novel, sustainable adsorbents and their use: papers on activated carbon-type materials derived from natural matter, or surfactant-modified clays and related minerals, would not fulfil this criterion. The Journal particularly welcomes contributions involving environmentally, economically and socially sustainable technology for water treatment, including those which are energy-efficient, with minimal or no chemical consumption, and capable of water recycling and reuse that minimizes the direct disposal of wastewater to the aquatic environment. Papers that describe novel ideas for solving issues related to water quality and availability are also welcome, as are those that show the transfer of techniques from other disciplines. The Journal will consider papers dealing with processes for various water matrices including drinking water (except desalination), domestic, urban and industrial wastewaters, in addition to their residues. It is expected that the journal will be of particular relevance to chemical and process engineers working in the field. The Journal welcomes Full Text papers, Short Communications, State-of-the-Art Reviews and Letters to Editors and Case Studies