Chunlin Gou, Ziqing Weng, Xiaoshuang Dai, Jianpeng Liu, Ke Mei, Bin Sun, Neng Qiu
{"title":"Water-stable PEG2000-modified citric acid crosslinked β-CD MOF for efficient removal of tetracycline hydrochloride: synthesis, adsorption behavior, and mechanism.","authors":"Chunlin Gou, Ziqing Weng, Xiaoshuang Dai, Jianpeng Liu, Ke Mei, Bin Sun, Neng Qiu","doi":"10.1016/j.carres.2025.109631","DOIUrl":null,"url":null,"abstract":"<p><p>To address the ecological and health risks associated with residual tetracycline hydrochloride (TCH) in water, a green-synthesized adsorbent composed of β-cyclodextrin (β-CD), citric acid (CA), and polyethylene glycol (PEG) was developed for the effective removal of TCH from wastewater. The synthetic parameters were optimized, and the resulting PEG-CA-β-CD MOF was characterized by FT-IR, XRD, and SE. TGA analysis indicated an increase in the thermal stability. The maximum adsorption capacity of PEG-CA-β-CD MOF for TCH was 221.6 mg/g at pH = 4. Adsorption kinetics were well-described by the Elovich equation model, while the Freundlich isothermal model accurately described the equilibrium data adsorption Thermodynamic analysis revealed that the adsorption process was endothermic and spontaneous. Furthermore, the adsorbent maintained 84 % of its initial adsorption capacity after four reuse cycles. Analysis using zeta potential, FT-IR, and XPS confirmed that the possible adsorption mechanism of TCH mainly involves electrostatic interactions, hydrogen bonding, and cavity encapsulation. Finally, simulated wastewater experiments showed that PEG-CA-β-CD MOF was able to adsorb TCH efficiently even in the presence of other pollutants. Overall, due to its green synthesis process, low cost, ease of regeneration, and multi-mechanistic adsorption capability, the PEG-CA-β-CD MOF exhibits significant potential for TCH removal in wastewater treatment.</p>","PeriodicalId":9415,"journal":{"name":"Carbohydrate Research","volume":"557 ","pages":"109631"},"PeriodicalIF":2.5000,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Carbohydrate Research","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1016/j.carres.2025.109631","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/8/7 0:00:00","PubModel":"Epub","JCR":"Q3","JCRName":"BIOCHEMISTRY & MOLECULAR BIOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
To address the ecological and health risks associated with residual tetracycline hydrochloride (TCH) in water, a green-synthesized adsorbent composed of β-cyclodextrin (β-CD), citric acid (CA), and polyethylene glycol (PEG) was developed for the effective removal of TCH from wastewater. The synthetic parameters were optimized, and the resulting PEG-CA-β-CD MOF was characterized by FT-IR, XRD, and SE. TGA analysis indicated an increase in the thermal stability. The maximum adsorption capacity of PEG-CA-β-CD MOF for TCH was 221.6 mg/g at pH = 4. Adsorption kinetics were well-described by the Elovich equation model, while the Freundlich isothermal model accurately described the equilibrium data adsorption Thermodynamic analysis revealed that the adsorption process was endothermic and spontaneous. Furthermore, the adsorbent maintained 84 % of its initial adsorption capacity after four reuse cycles. Analysis using zeta potential, FT-IR, and XPS confirmed that the possible adsorption mechanism of TCH mainly involves electrostatic interactions, hydrogen bonding, and cavity encapsulation. Finally, simulated wastewater experiments showed that PEG-CA-β-CD MOF was able to adsorb TCH efficiently even in the presence of other pollutants. Overall, due to its green synthesis process, low cost, ease of regeneration, and multi-mechanistic adsorption capability, the PEG-CA-β-CD MOF exhibits significant potential for TCH removal in wastewater treatment.
期刊介绍：
Carbohydrate Research publishes reports of original research in the following areas of carbohydrate science: action of enzymes, analytical chemistry, biochemistry (biosynthesis, degradation, structural and functional biochemistry, conformation, molecular recognition, enzyme mechanisms, carbohydrate-processing enzymes, including glycosidases and glycosyltransferases), chemical synthesis, isolation of natural products, physicochemical studies, reactions and their mechanisms, the study of structures and stereochemistry, and technological aspects.
Papers on polysaccharides should have a "molecular" component; that is a paper on new or modified polysaccharides should include structural information and characterization in addition to the usual studies of rheological properties and the like. A paper on a new, naturally occurring polysaccharide should include structural information, defining monosaccharide components and linkage sequence.
Papers devoted wholly or partly to X-ray crystallographic studies, or to computational aspects (molecular mechanics or molecular orbital calculations, simulations via molecular dynamics), will be considered if they meet certain criteria. For computational papers the requirements are that the methods used be specified in sufficient detail to permit replication of the results, and that the conclusions be shown to have relevance to experimental observations - the authors'' own data or data from the literature. Specific directions for the presentation of X-ray data are given below under Results and "discussion".
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
