{"title":"A novel magnetic sepiolite/Fe2O3 composite for adsorptive removal of lead(II) ions from aqueous solutions","authors":"Osman Uygun, Ayşenur Murat, Gaye Ö. Çakal","doi":"10.1180/clm.2023.24","DOIUrl":null,"url":null,"abstract":": Lead is one of the most frequently encountered toxic heavy metals that requires immediate remediation. To remediate wastewater, clay minerals are the preferred adsorbents. In this study, the removal of lead from aqueous solutions via adsorption was investigated using raw and iron-modified Turkish sepiolite. The aim of this study was to examine the effect of modification and environmental conditions on the sorptive properties of sepiolite samples. Initially, the raw sepiolite (Sep) and magnetic sepiolite/Fe 2 O 3 composite (MagSep) prepared by the co-precipitation method were characterized using mineralogical and petrographical means, and the physico-chemical properties were determined. Then, the batch adsorption of lead (Pb 2+ ) ions on the sepiolite samples were examined under various conditions (solution pH, adsorbent dosage, contact time, initial Pb 2+ ion concentration, temperature, shaking rate). The adsorption capacity of MagSep was found to be higher than that of Sep under all experimental conditions. The results showed that the adsorption process followed a pseudo-second-order kinetic model,","PeriodicalId":10311,"journal":{"name":"Clay Minerals","volume":" ","pages":""},"PeriodicalIF":1.1000,"publicationDate":"2023-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Clay Minerals","FirstCategoryId":"89","ListUrlMain":"https://doi.org/10.1180/clm.2023.24","RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
: Lead is one of the most frequently encountered toxic heavy metals that requires immediate remediation. To remediate wastewater, clay minerals are the preferred adsorbents. In this study, the removal of lead from aqueous solutions via adsorption was investigated using raw and iron-modified Turkish sepiolite. The aim of this study was to examine the effect of modification and environmental conditions on the sorptive properties of sepiolite samples. Initially, the raw sepiolite (Sep) and magnetic sepiolite/Fe 2 O 3 composite (MagSep) prepared by the co-precipitation method were characterized using mineralogical and petrographical means, and the physico-chemical properties were determined. Then, the batch adsorption of lead (Pb 2+ ) ions on the sepiolite samples were examined under various conditions (solution pH, adsorbent dosage, contact time, initial Pb 2+ ion concentration, temperature, shaking rate). The adsorption capacity of MagSep was found to be higher than that of Sep under all experimental conditions. The results showed that the adsorption process followed a pseudo-second-order kinetic model,
期刊介绍：
Clay Minerals is an international journal of mineral sciences, published four times a year, including research papers about clays, clay minerals and related materials, natural or synthetic. The journal includes papers on Earth processes soil science, geology/mineralogy, chemistry/material science, colloid/surface science, applied science and technology and health/ environment topics. The journal has an international editorial board with members from fifteen countries.
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