Enhanced sequestration of ciprofloxacin from aqueous solution using composite montmorillonite-kaolin clay adsorbent

IF 5.45 Q1 Physics and Astronomy

Nano-Structures & Nano-Objects Pub Date : 2024-09-30 DOI:10.1016/j.nanoso.2024.101364

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引用次数: 0

Abstract

Clay minerals are low-cost and environmentally benign natural adsorbents with huge potential for removing micropollutants from aqueous solutions owing to their intrinsic surface properties. In this study, montmorillonite and kaolin clay minerals were activated using NaNO₃ and HNO₃ to develop activated montmorillonite- kaolin clay composites (AMKCC) material for the sequestration of ciprofloxacin (CIP) from aqueous solution. The developed AMKCC was characterized using X-ray fluorescence (XRF), Brunauer-emmett-teller (BET), scanning electron microscopy (SEM), fourier transform infrared spectroscopy (FTIR), X-ray diffractometer (XRD) and X-ray photoelectron spectroscopy (XPS). The BET analysis reveals an improved BET surface area, pore volume and pore diameter of 139.13 m²/g, 0.17 cm³/g and 2.18 nm, respectively. At optimum conditions, pH (3.56), initial concentration (16.74 mg/L), time (77.9 mins) and adsorbent dosage (0.4 g), the percentage of ciprofloxacin removed from aqueous solution was 97 %. The adsorption of ciprofloxacin (CIP) using AMKCC was spontaneous, feasible, endothermic, and followed Freundlich isotherm with pseudo-second-order kinetics. The maximum monolayer adsorption capacity of AMKCC is 344.82 mg/g. The desorption studies revealed HCl as the best eluent for AMKCC regeneration. Therefore, AMKCC has considerable potential for the adsorption of pharmaceuticals from aqueous solution.

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使用蒙脱石-高岭土复合吸附剂提高水溶液中环丙沙星的吸附能力

粘土矿物是一种低成本、对环境无害的天然吸附剂，由于其固有的表面特性，在去除水溶液中的微污染物方面潜力巨大。本研究利用 NaNO3 和 HNO3 对蒙脱石和高岭土矿物进行活化，开发出活化蒙脱石-高岭土复合材料（AMKCC），用于从水溶液中吸附环丙沙星（CIP）。利用 X 射线荧光 (XRF)、Brunauer-emmett-teller (BET)、扫描电子显微镜 (SEM)、傅立叶变换红外光谱 (FTIR)、X 射线衍射仪 (XRD) 和 X 射线光电子能谱 (XPS) 对所开发的 AMKCC 进行了表征。BET 分析显示，BET 表面积、孔体积和孔直径分别提高到 139.13 m2/g、0.17 cm3/g 和 2.18 nm。在最佳 pH 值（3.56）、初始浓度（16.74 毫克/升）、吸附时间（77.9 分钟）和吸附剂用量（0.4 克）条件下，水溶液中环丙沙星的去除率为 97%。使用 AMKCC 对环丙沙星（CIP）的吸附是自发的、可行的、内热的，并遵循 Freundlich 等温线和伪秒阶动力学。AMKCC 的最大单层吸附容量为 344.82 毫克/克。解吸研究表明，盐酸是 AMKCC 再生的最佳洗脱剂。因此，AMKCC 在从水溶液中吸附药物方面具有相当大的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nano-Structures & Nano-Objects Physics and Astronomy-Condensed Matter Physics

CiteScore

9.20

自引率

0.00%

发文量

审稿时长

22 days

期刊介绍： Nano-Structures & Nano-Objects is a new journal devoted to all aspects of the synthesis and the properties of this new flourishing domain. The journal is devoted to novel architectures at the nano-level with an emphasis on new synthesis and characterization methods. The journal is focused on the objects rather than on their applications. However, the research for new applications of original nano-structures & nano-objects in various fields such as nano-electronics, energy conversion, catalysis, drug delivery and nano-medicine is also welcome. The scope of Nano-Structures & Nano-Objects involves: -Metal and alloy nanoparticles with complex nanostructures such as shape control, core-shell and dumbells -Oxide nanoparticles and nanostructures, with complex oxide/metal, oxide/surface and oxide /organic interfaces -Inorganic semi-conducting nanoparticles (quantum dots) with an emphasis on new phases, structures, shapes and complexity -Nanostructures involving molecular inorganic species such as nanoparticles of coordination compounds, molecular magnets, spin transition nanoparticles etc. or organic nano-objects, in particular for molecular electronics -Nanostructured materials such as nano-MOFs and nano-zeolites -Hetero-junctions between molecules and nano-objects, between different nano-objects & nanostructures or between nano-objects & nanostructures and surfaces -Methods of characterization specific of the nano size or adapted for the nano size such as X-ray and neutron scattering, light scattering, NMR, Raman, Plasmonics, near field microscopies, various TEM and SEM techniques, magnetic studies, etc .