S. I. Zherebtsov, N. V. Malyshenko, K. S. Votolin, K. M. Shpakodraev
{"title":"Interaction of Copper and Lead Cations with Residues Derived from Lignite","authors":"S. I. Zherebtsov, N. V. Malyshenko, K. S. Votolin, K. M. Shpakodraev","doi":"10.3103/S1068364X2560071X","DOIUrl":null,"url":null,"abstract":"<p>The coal residues (CR) obtained after the removal of humic matter from lignite is characterized by infrared (IR), nuclear magnetic resonance (NMR), and electron paramagnetic resonance (EPR). The structural groups present in the residues differ from those in the initial lignite. The sorption of copper and lead cations by the coal residues is studied. The sorptional capacity of the residues is greater for copper than for lead. Two mechanisms are involved in the interaction of the residues with copper and lead cations: ion exchange of the metal cations for protons of the carboxyl groups; and complex formation. The ligands involved may be oxygen-bearing structural groups such as carboxyl and phenol hydroxyl groups.</p>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"68 6","pages":"515 - 521"},"PeriodicalIF":0.5000,"publicationDate":"2025-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Coke and Chemistry","FirstCategoryId":"1085","ListUrlMain":"https://link.springer.com/article/10.3103/S1068364X2560071X","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
引用次数: 0
Abstract
The coal residues (CR) obtained after the removal of humic matter from lignite is characterized by infrared (IR), nuclear magnetic resonance (NMR), and electron paramagnetic resonance (EPR). The structural groups present in the residues differ from those in the initial lignite. The sorption of copper and lead cations by the coal residues is studied. The sorptional capacity of the residues is greater for copper than for lead. Two mechanisms are involved in the interaction of the residues with copper and lead cations: ion exchange of the metal cations for protons of the carboxyl groups; and complex formation. The ligands involved may be oxygen-bearing structural groups such as carboxyl and phenol hydroxyl groups.
期刊介绍：
The journal publishes scientific developments and applications in the field of coal beneficiation and preparation for coking, coking processes, design of coking ovens and equipment, by-product recovery, automation of technological processes, ecology and economics. It also presents indispensable information on the scientific events devoted to thermal rectification, use of smokeless coal as an energy source, and manufacture of different liquid and solid chemical products.
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