{"title":"Dynamic intercalation of methylene blue in BC-MgFe-HT composite: Unveiling adsorption mechanisms for efficient wastewater treatment","authors":"","doi":"10.1016/j.gsd.2024.101314","DOIUrl":null,"url":null,"abstract":"<div><p>Developing efficient and eco-friendly adsorbents for removing dye from wastewater presents a significant challenge. In this study, by combining MgFe-hydrotalcite (MgFe-HT) with bamboo charcoal (BC) we report the synthesis of a composite material named BC-MgFe-HT to achieve rapid and effective adsorption of methylene blue (MB) dye. The novelty of our work lies in the distinctive intercalation arrangement of the MB dye post-adsorption within the BC-MgFe-HT layers, which was quantitatively measured and found to be at an intercalation angle of approximately 44.26° rather than the conventional vertical positioning. This unique phenomenon indicates a dynamic rearrangement of the composite structure upon MB adsorption, significantly enhancing its adsorption capacity and efficiency. Comprehensive characterization of the BC-MgFe-HT composite was performed using the following techniques such as X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), Brunauer–Emmett–Teller (BET) surface area analysis, and thermogravimetric analysis (TGA). The adsorption studies demonstrated a maximum adsorption capacity of 194.09 mg/g within 20 min, attributed to the composite's high surface area, porous architecture, and dye intercalation capacity. Kinetic studies revealed that the pseudo-second-order (PSO) kinetics model best describes the adsorption process, while the Langmuir isotherm model provided the most accurate fit for the adsorption equilibrium data. These findings offer novel insights into the adsorption mechanisms of MB onto the BC-MgFe-HT composite, highlighting its potential for the design and optimization of composite materials for effective wastewater remediation.</p></div>","PeriodicalId":37879,"journal":{"name":"Groundwater for Sustainable Development","volume":null,"pages":null},"PeriodicalIF":4.9000,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2352801X24002376/pdfft?md5=b3b76abf066a0650c0058cec5c0e4592&pid=1-s2.0-S2352801X24002376-main.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Groundwater for Sustainable Development","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2352801X24002376","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, ENVIRONMENTAL","Score":null,"Total":0}
引用次数: 0
Abstract
Developing efficient and eco-friendly adsorbents for removing dye from wastewater presents a significant challenge. In this study, by combining MgFe-hydrotalcite (MgFe-HT) with bamboo charcoal (BC) we report the synthesis of a composite material named BC-MgFe-HT to achieve rapid and effective adsorption of methylene blue (MB) dye. The novelty of our work lies in the distinctive intercalation arrangement of the MB dye post-adsorption within the BC-MgFe-HT layers, which was quantitatively measured and found to be at an intercalation angle of approximately 44.26° rather than the conventional vertical positioning. This unique phenomenon indicates a dynamic rearrangement of the composite structure upon MB adsorption, significantly enhancing its adsorption capacity and efficiency. Comprehensive characterization of the BC-MgFe-HT composite was performed using the following techniques such as X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), Brunauer–Emmett–Teller (BET) surface area analysis, and thermogravimetric analysis (TGA). The adsorption studies demonstrated a maximum adsorption capacity of 194.09 mg/g within 20 min, attributed to the composite's high surface area, porous architecture, and dye intercalation capacity. Kinetic studies revealed that the pseudo-second-order (PSO) kinetics model best describes the adsorption process, while the Langmuir isotherm model provided the most accurate fit for the adsorption equilibrium data. These findings offer novel insights into the adsorption mechanisms of MB onto the BC-MgFe-HT composite, highlighting its potential for the design and optimization of composite materials for effective wastewater remediation.
期刊介绍：
Groundwater for Sustainable Development is directed to different stakeholders and professionals, including government and non-governmental organizations, international funding agencies, universities, public water institutions, public health and other public/private sector professionals, and other relevant institutions. It is aimed at professionals, academics and students in the fields of disciplines such as: groundwater and its connection to surface hydrology and environment, soil sciences, engineering, ecology, microbiology, atmospheric sciences, analytical chemistry, hydro-engineering, water technology, environmental ethics, economics, public health, policy, as well as social sciences, legal disciplines, or any other area connected with water issues. The objectives of this journal are to facilitate: • The improvement of effective and sustainable management of water resources across the globe. • The improvement of human access to groundwater resources in adequate quantity and good quality. • The meeting of the increasing demand for drinking and irrigation water needed for food security to contribute to a social and economically sound human development. • The creation of a global inter- and multidisciplinary platform and forum to improve our understanding of groundwater resources and to advocate their effective and sustainable management and protection against contamination. • Interdisciplinary information exchange and to stimulate scientific research in the fields of groundwater related sciences and social and health sciences required to achieve the United Nations Millennium Development Goals for sustainable development.
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