Improving the adsorption capacity of graphene oxide. Effect of Ca2+ on tetracycline retention

IF 3 4区工程技术 Q3 CHEMISTRY, PHYSICAL

Adsorption Pub Date : 2024-05-25 DOI:10.1007/s10450-024-00493-4

Florencia M. Onaga Medina, Marcelo J. Avena, María E. Parolo

{"title":"Improving the adsorption capacity of graphene oxide. Effect of Ca2+ on tetracycline retention","authors":"Florencia M. Onaga Medina, Marcelo J. Avena, María E. Parolo","doi":"10.1007/s10450-024-00493-4","DOIUrl":null,"url":null,"abstract":"<div>Tetracyclines (TCs) constitute a group of antibiotics that are commonly used to treat bacterial diseases, in veterinary medicine and as an additive in animal feed. This broad application has led to their accumulation in food products and the environment because sewage treatment plants cannot completely remove them. Therefore, the aim of this study was to synthesize graphene oxide (GO) and evaluate its TC adsorption properties in aqueous media. The effects of pH (between 2.5 and 11) and Ca2+ concentration (between 0 and 1 M) were thoroughly investigated. Structural, textural, and electrokinetic properties of the prepared GO were determined by N2 adsorption/desorption, XRD, TEM, UV–vis, FTIR, XPS, thermogravimetry and electrophoretic mobility measurements. TC adsorption on GO is an interplay between the two main roles played by Ca2+: competitor or bridging cation. At low pH, there is cation exchange, and Ca2+ behaves as a competitor of the positively charged TC species, decreasing adsorption as calcium concentration increases. At high, the formation of Ca bridges between the surface and TC (GO-Ca2+-TC) is favored, increasing the adsorption of the antibiotic by increasing calcium concentration. Different combinations of Ca2+ and pH effects are important to improve the use of GO either as a pH-dependent and reversible TC adsorbent for decontamination or as pH-independent adsorbent for TC quantification with electrochemical sensors.</div>","PeriodicalId":458,"journal":{"name":"Adsorption","volume":"30 6","pages":"1193 - 1203"},"PeriodicalIF":3.0000,"publicationDate":"2024-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Adsorption","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s10450-024-00493-4","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}

引用次数: 0

Abstract

Tetracyclines (TCs) constitute a group of antibiotics that are commonly used to treat bacterial diseases, in veterinary medicine and as an additive in animal feed. This broad application has led to their accumulation in food products and the environment because sewage treatment plants cannot completely remove them. Therefore, the aim of this study was to synthesize graphene oxide (GO) and evaluate its TC adsorption properties in aqueous media. The effects of pH (between 2.5 and 11) and Ca²⁺ concentration (between 0 and 1 M) were thoroughly investigated. Structural, textural, and electrokinetic properties of the prepared GO were determined by N₂ adsorption/desorption, XRD, TEM, UV–vis, FTIR, XPS, thermogravimetry and electrophoretic mobility measurements. TC adsorption on GO is an interplay between the two main roles played by Ca²⁺: competitor or bridging cation. At low pH, there is cation exchange, and Ca²⁺ behaves as a competitor of the positively charged TC species, decreasing adsorption as calcium concentration increases. At high, the formation of Ca bridges between the surface and TC (GO-Ca²⁺-TC) is favored, increasing the adsorption of the antibiotic by increasing calcium concentration. Different combinations of Ca²⁺ and pH effects are important to improve the use of GO either as a pH-dependent and reversible TC adsorbent for decontamination or as pH-independent adsorbent for TC quantification with electrochemical sensors.

Abstract Image

查看原文本刊更多论文

提高氧化石墨烯的吸附能力。Ca2+ 对四环素保留率的影响

四环素（TC）是一类抗生素，常用于治疗细菌性疾病、兽医和动物饲料添加剂。这种广泛的应用导致它们在食品和环境中积累，因为污水处理厂无法完全清除它们。因此，本研究旨在合成氧化石墨烯（GO）并评估其在水介质中的 TC 吸附特性。研究深入探讨了 pH 值（2.5 至 11）和 Ca2+ 浓度（0 至 1 M）的影响。通过N2吸附/解吸、XRD、TEM、UV-vis、FTIR、XPS、热重法和电泳迁移率测量，确定了制备的GO的结构、质地和电动力学特性。TC 在 GO 上的吸附是 Ca2+ 的两种主要作用之间的相互作用：竞争阳离子或架桥阳离子。在 pH 值较低时，存在阳离子交换，Ca2+ 是带正电的 TC 的竞争者，随着钙浓度的增加，吸附量减少。当 pH 值较高时，表面与 TC 之间会形成 Ca 桥（GO-Ca2+-TC），随着钙浓度的增加，抗生素的吸附量也会增加。Ca2+ 和 pH 值效应的不同组合对于改进 GO 的使用非常重要，既可以将其作为一种依赖于 pH 值的可逆 TC 吸附剂用于净化，也可以将其作为一种不依赖于 pH 值的吸附剂用于电化学传感器的 TC 定量。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Adsorption 工程技术-工程：化工

CiteScore

8.10

自引率

3.00%

发文量

审稿时长

2.4 months

期刊介绍： The journal Adsorption provides authoritative information on adsorption and allied fields to scientists, engineers, and technologists throughout the world. The information takes the form of peer-reviewed articles, R&D notes, topical review papers, tutorial papers, book reviews, meeting announcements, and news. Coverage includes fundamental and practical aspects of adsorption: mathematics, thermodynamics, chemistry, and physics, as well as processes, applications, models engineering, and equipment design. Among the topics are Adsorbents: new materials, new synthesis techniques, characterization of structure and properties, and applications; Equilibria: novel theories or semi-empirical models, experimental data, and new measurement methods; Kinetics: new models, experimental data, and measurement methods. Processes: chemical, biochemical, environmental, and other applications, purification or bulk separation, fixed bed or moving bed systems, simulations, experiments, and design procedures.