Qi Wang , Akshay A. Ransing , D.B. Mahadik , Puttavva Meti , Haryeong Choi , Taehee Kim , Hyung-Ho Park
{"title":"Phenyl-bridged silica aerogels with enhanced textural and mechanical properties for heavy metal removal","authors":"Qi Wang , Akshay A. Ransing , D.B. Mahadik , Puttavva Meti , Haryeong Choi , Taehee Kim , Hyung-Ho Park","doi":"10.1016/j.jwpe.2025.107240","DOIUrl":null,"url":null,"abstract":"<div><div>The refluxing method was used to prepare a bridged silicon precursor, in which different numbers of benzene rings (hydroquinone and 4,4′-dihydroxybiphenyl as the organic components) were added as bridges between silica clusters. Using this precursor, phenyl-bridged silica aerogels were synthesized via the sol-gel method, followed by supercritical drying. The phenyl-bridged silica aerogels possessed a homogeneous cage-like network with a high specific surface area (1510 m<sup>2</sup>/g), low bulk density, and high strength (1.79 MPa). Further, the phenyl-bridged silica aerogels were amino functionalized to remove heavy metal ions. The removal efficiencies of these amino-modified aerogels for Pb<sup>2+</sup> via adsorption were found to be high (99.95 %) owing to the high-surface-area nanostructured silica network. The maximum adsorption capacity fitted by the Langmuir adsorption model was 704.225 mg g<sup>−1</sup> and the outstanding selectivity for Pb<sup>2+</sup>. Hence, phenyl-bridged amino-modified silica aerogels have high potential for use in applications such as removing heavy metal ions.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"71 ","pages":"Article 107240"},"PeriodicalIF":6.3000,"publicationDate":"2025-02-13","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/S2214714425003125","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}
引用次数: 0
Abstract
The refluxing method was used to prepare a bridged silicon precursor, in which different numbers of benzene rings (hydroquinone and 4,4′-dihydroxybiphenyl as the organic components) were added as bridges between silica clusters. Using this precursor, phenyl-bridged silica aerogels were synthesized via the sol-gel method, followed by supercritical drying. The phenyl-bridged silica aerogels possessed a homogeneous cage-like network with a high specific surface area (1510 m2/g), low bulk density, and high strength (1.79 MPa). Further, the phenyl-bridged silica aerogels were amino functionalized to remove heavy metal ions. The removal efficiencies of these amino-modified aerogels for Pb2+ via adsorption were found to be high (99.95 %) owing to the high-surface-area nanostructured silica network. The maximum adsorption capacity fitted by the Langmuir adsorption model was 704.225 mg g−1 and the outstanding selectivity for Pb2+. Hence, phenyl-bridged amino-modified silica aerogels have high potential for use in applications such as removing heavy metal ions.
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