{"title":"Graphene oxide/montmorillonite nanocomposite for removal of antibiotics from wastewater","authors":"Priyanka Negi , Brij Bhushan , Arunima Nayak , Sonali Goyal , Jay Singh Meena , Sushil Kumar","doi":"10.1016/j.matchemphys.2025.131119","DOIUrl":null,"url":null,"abstract":"<div><div>Graphene oxide (GO) is a high potential adsorbent yet its toxicity is pronounced. With intent for an environmentally friendly solution, successful encapsulation of GO fabricated via an improved Hummers' method (GO-3) was ensured with an acid activated montmorillonite (AMT-4) as per studies revealed with the help of FTIR, XRD, Fe-SEM + EDAX, TEM, XPS and Raman analysis. The fabricated composite (MG-5) having GO-3: AMT-4 ratio of 1:0.25 showed highest stability and highest Ofloxacin (OFC) removal of 89 % at pH 6–7. Mechanistic aspect of binding as elucidated via XPS, FTIR and pH studies revealed interplay of electrostatic attraction, hydrogen bonding, π-π interactions, hydrophobic interactions, pore-filling. Three aspects worth highlighting in MG-5 is its high uptake efficiency for various other broad-spectrum antibiotics viz. Norfloxacin (NOR), Ciprofloxacin (CIP) and Tetracycline (TTC); its high reusability for 6 consecutive cycles and its significantly reduced phytotoxicity towards germination of <em>Vigna radiata</em> seeds and <em>Cucumis sativus</em> seeds. Phytotoxicity tests revealed the effective minimization of toxic effect by MG-5 or GO-3 treated wastewater towards germination of bean and cucumber seeds.</div><div>The novel aspect is the contributory role of montmorillonite towards development of an environmentally benign, advanced GO composite for wastewater treatment and in phytotoxicity management.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"344 ","pages":"Article 131119"},"PeriodicalIF":4.7000,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Chemistry and Physics","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0254058425007655","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Graphene oxide (GO) is a high potential adsorbent yet its toxicity is pronounced. With intent for an environmentally friendly solution, successful encapsulation of GO fabricated via an improved Hummers' method (GO-3) was ensured with an acid activated montmorillonite (AMT-4) as per studies revealed with the help of FTIR, XRD, Fe-SEM + EDAX, TEM, XPS and Raman analysis. The fabricated composite (MG-5) having GO-3: AMT-4 ratio of 1:0.25 showed highest stability and highest Ofloxacin (OFC) removal of 89 % at pH 6–7. Mechanistic aspect of binding as elucidated via XPS, FTIR and pH studies revealed interplay of electrostatic attraction, hydrogen bonding, π-π interactions, hydrophobic interactions, pore-filling. Three aspects worth highlighting in MG-5 is its high uptake efficiency for various other broad-spectrum antibiotics viz. Norfloxacin (NOR), Ciprofloxacin (CIP) and Tetracycline (TTC); its high reusability for 6 consecutive cycles and its significantly reduced phytotoxicity towards germination of Vigna radiata seeds and Cucumis sativus seeds. Phytotoxicity tests revealed the effective minimization of toxic effect by MG-5 or GO-3 treated wastewater towards germination of bean and cucumber seeds.
The novel aspect is the contributory role of montmorillonite towards development of an environmentally benign, advanced GO composite for wastewater treatment and in phytotoxicity management.
期刊介绍:
Materials Chemistry and Physics is devoted to short communications, full-length research papers and feature articles on interrelationships among structure, properties, processing and performance of materials. The Editors welcome manuscripts on thin films, surface and interface science, materials degradation and reliability, metallurgy, semiconductors and optoelectronic materials, fine ceramics, magnetics, superconductors, specialty polymers, nano-materials and composite materials.