Advanced theoretical interpretations of tetracycline adsorption on halloysite nanotubes via a monolayer model

IF 3.4 4区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

International Journal of Environmental Science and Technology Pub Date : 2025-07-20 DOI:10.1007/s13762-025-06642-8

L. Sellaoui, N. Sghaier, A. Erto

{"title":"Advanced theoretical interpretations of tetracycline adsorption on halloysite nanotubes via a monolayer model","authors":"L. Sellaoui, N. Sghaier, A. Erto","doi":"10.1007/s13762-025-06642-8","DOIUrl":null,"url":null,"abstract":"<div><p>This study explores the adsorption of tetracycline (TTC) onto three halloysite-based adsorbents: raw halloysite (H), thermally modified halloysite at 600°C (H600), and thermally and HCl treated halloysite (H600-5N). The adsorption mechanisms are analyzed through theoretical parameters derived from isotherm fitting using a monolayer adsorption statistical model. The adsorption parameter <i>n</i> reveals the orientation and aggregation of TTC on the adsorbents, showing that raw halloysite (H) exhibits the highest site affinity and favored angled adsorption. Modified adsorbents (H600 and H600-5N) determine a less molecule aggregation and a transition to mixed orientations by increasing temperature. The effective receptor site density and maximum adsorption capacity indicated that H600 has superior performances, attributed to an increase in active site density due to thermal effects and improved surface properties. Adsorption energy calculations confirm that the adsorption mechanism is primarily physical, dominated by van der Waals forces and hydrogen bonding, with adsorption energy (ΔE) below 40 kJ/mol. This reversible adsorption process highlights the potential of halloysite-based adsorbents, particularly H600, for efficient TTC removal in environmental and industrial applications.</p></div>","PeriodicalId":589,"journal":{"name":"International Journal of Environmental Science and Technology","volume":"22 15","pages":"15387 - 15396"},"PeriodicalIF":3.4000,"publicationDate":"2025-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Environmental Science and Technology","FirstCategoryId":"93","ListUrlMain":"https://link.springer.com/article/10.1007/s13762-025-06642-8","RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}

引用次数: 0

Abstract

This study explores the adsorption of tetracycline (TTC) onto three halloysite-based adsorbents: raw halloysite (H), thermally modified halloysite at 600°C (H600), and thermally and HCl treated halloysite (H600-5N). The adsorption mechanisms are analyzed through theoretical parameters derived from isotherm fitting using a monolayer adsorption statistical model. The adsorption parameter n reveals the orientation and aggregation of TTC on the adsorbents, showing that raw halloysite (H) exhibits the highest site affinity and favored angled adsorption. Modified adsorbents (H600 and H600-5N) determine a less molecule aggregation and a transition to mixed orientations by increasing temperature. The effective receptor site density and maximum adsorption capacity indicated that H600 has superior performances, attributed to an increase in active site density due to thermal effects and improved surface properties. Adsorption energy calculations confirm that the adsorption mechanism is primarily physical, dominated by van der Waals forces and hydrogen bonding, with adsorption energy (ΔE) below 40 kJ/mol. This reversible adsorption process highlights the potential of halloysite-based adsorbents, particularly H600, for efficient TTC removal in environmental and industrial applications.

查看原文本刊更多论文

利用单层模型对四环素在高岭土纳米管上的吸附进行了先进的理论解释

本研究探讨了四环素（TTC）在三种高岭土基吸附剂上的吸附，分别是：原高岭土(H)、600℃高温改性高岭土（H600）和高温和HCl处理的高岭土（H600- 5n）。利用单层吸附统计模型，通过等温线拟合得到理论参数，分析了吸附机理。吸附参数n反映了TTC在吸附剂上的取向和聚集，表明原高岭土(H)具有最高的位点亲和力和有利的角度吸附。改性吸附剂（H600和H600- 5n）通过增加温度来减少分子聚集并向混合取向转变。有效受体位点密度和最大吸附容量表明H600具有优越的性能，这是由于热效应增加了活性位点密度和改善了表面性能。吸附能计算证实，吸附机制主要是物理吸附，以范德华力和氢键为主，吸附能（ΔE）低于40 kJ/mol。这种可逆吸附过程突出了高岭土基吸附剂，特别是H600，在环境和工业应用中有效去除TTC的潜力。

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

International Journal of Environmental Science and Technology 环境科学-环境科学

CiteScore

5.60

自引率

6.50%

发文量

806

审稿时长

10.8 months

期刊介绍： International Journal of Environmental Science and Technology (IJEST) is an international scholarly refereed research journal which aims to promote the theory and practice of environmental science and technology, innovation, engineering and management. A broad outline of the journal''s scope includes: peer reviewed original research articles, case and technical reports, reviews and analyses papers, short communications and notes to the editor, in interdisciplinary information on the practice and status of research in environmental science and technology, both natural and man made. The main aspects of research areas include, but are not exclusive to; environmental chemistry and biology, environments pollution control and abatement technology, transport and fate of pollutants in the environment, concentrations and dispersion of wastes in air, water, and soil, point and non-point sources pollution, heavy metals and organic compounds in the environment, atmospheric pollutants and trace gases, solid and hazardous waste management; soil biodegradation and bioremediation of contaminated sites; environmental impact assessment, industrial ecology, ecological and human risk assessment; improved energy management and auditing efficiency and environmental standards and criteria.