A. C. Tella, S. O. Owalude, A. B. Alabi, I. Haruna, V. O. Adimula, V. O. Oninla, S. E. Elaigwu
{"title":"Synthesis, characterization and adsorption of lead from water using 3-D metal carboxylate and nitrogen donor coordination polymer","authors":"A. C. Tella, S. O. Owalude, A. B. Alabi, I. Haruna, V. O. Adimula, V. O. Oninla, S. E. Elaigwu","doi":"10.1007/s13762-024-06091-9","DOIUrl":null,"url":null,"abstract":"<div><p>Environmental pollution by toxic metals, such as lead is a challenge that requires continuous attention. Coordination polymers prepared by green and eco-friendly processes have been used as efficient adsorbents to combat this menace in recent times. Thus, in this study, a Zn<sup>2+</sup> based coordination polymer, formulated as Zn(Dph)<sub>2</sub>(4,4Bpy)<sub>2</sub>·H<sub>2</sub>O, was synthesized via solvent-free and solvent-based methods. Characterization of the compound carried out by FTIR, CHN, and PXRD techniques showed that the two compounds are similar. BET values indicated a decrease in the surface area, as well as the pore volumes and sizes of the adsorbent after the adsorption process. SEM analysis showed difference in the monographs before and after the adsorption study. The synthesized solvent-free compound was used as adsorbent in the removal of lead ions, an ubiquitous heavy metal of concern from aqueous medium using batch adsorption technique. The equilibrium time for the adsorption process was 50 min, and the maximum adsorption capacity was found to be 26.385 mg/g. The kinetic data fitted the pseudo-second order kinetics with R<sup>2</sup> value of 0.9996, while the Free energy value, E calculated for the process was 10.0 kJ/mol, suggesting that the rate-limiting step was chemical adsorption. The adsorption data was best described by the Freundlich isotherm model (R<sup>2</sup> = 0.9704), implying that it followed a multilayered approach. Thermodynamic results showed that the adsorption process was orderly and endothermic. Thus, the obtained results portray the material as promising in wastewater treatment.</p></div>","PeriodicalId":589,"journal":{"name":"International Journal of Environmental Science and Technology","volume":"22 8","pages":"6983 - 6998"},"PeriodicalIF":3.0000,"publicationDate":"2024-10-14","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/s13762-024-06091-9","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
Environmental pollution by toxic metals, such as lead is a challenge that requires continuous attention. Coordination polymers prepared by green and eco-friendly processes have been used as efficient adsorbents to combat this menace in recent times. Thus, in this study, a Zn2+ based coordination polymer, formulated as Zn(Dph)2(4,4Bpy)2·H2O, was synthesized via solvent-free and solvent-based methods. Characterization of the compound carried out by FTIR, CHN, and PXRD techniques showed that the two compounds are similar. BET values indicated a decrease in the surface area, as well as the pore volumes and sizes of the adsorbent after the adsorption process. SEM analysis showed difference in the monographs before and after the adsorption study. The synthesized solvent-free compound was used as adsorbent in the removal of lead ions, an ubiquitous heavy metal of concern from aqueous medium using batch adsorption technique. The equilibrium time for the adsorption process was 50 min, and the maximum adsorption capacity was found to be 26.385 mg/g. The kinetic data fitted the pseudo-second order kinetics with R2 value of 0.9996, while the Free energy value, E calculated for the process was 10.0 kJ/mol, suggesting that the rate-limiting step was chemical adsorption. The adsorption data was best described by the Freundlich isotherm model (R2 = 0.9704), implying that it followed a multilayered approach. Thermodynamic results showed that the adsorption process was orderly and endothermic. Thus, the obtained results portray the material as promising in wastewater treatment.
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.
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