Sustainable selenium ions adsorption of cyclodextrin and cellulose functionalized layered double hydroxide/reduced graphene oxide nanocomposites

IF 6.3 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of water process engineering Pub Date : 2024-11-22 DOI:10.1016/j.jwpe.2024.106580

V. Nithya Priya , M. Rajkumar , V. Rajendran , J. Mobika , S.P. Linto Sibi , B. Veena , V. Vijayalakshmi , P. Ahila

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Abstract

In this study, we synthesized the β-Cyclodextrin (CD) and Carboxymethyl Cellulose (CC) functionalized LDH/rGO nanocomposites for the efficient uptake of selenium ions at a neutral pH. The surface morphology and physical properties of the nanocomposites were characterized using X-Ray Diffraction (XRD), High-Resolution Transmission Electron Microscopy (HRTEM), Energy-Dispersive X-Ray Spectroscopy (EDAX), Fourier-Transform Infrared Spectroscopy (FTIR), and N₂ adsorption-desorption analysis. Equilibrium adsorption experiments were carried out to optimize crucial parameters such as contact time (60–360 min), adsorbent dosage (0.01–0.1 g/L), and pH (2−11) for efficient selenium ion removal. Kinetic and isotherm studies were conducted to analyze the sorption performance of the nanocomposites. The Langmuir isotherm model provided an excellent fit for the adsorption data (R² ≥ 0.99), confirming the monolayer adsorption of selenium ions on the adsorbent surface. The maximum adsorption capacity of CC and CD composites was calculated for Se (IV) adsorption as 248.75 mg g⁻¹ and 275.48 mg g⁻¹, for Se (VI) adsorption as 153.37 mg g⁻¹ and 169.64 mg g⁻¹. Additionally, adsorption kinetics was assessed using the pseudo-second-order model, yielding high correlation coefficients (R² ≥ 0.98). Moreover, the adsorption mechanism, regeneration ability, and the impact of co-existing anions were investigated. Our findings demonstrate the effectiveness of the CD and CC incorporated LDH/rGO biocomposites in selenium ion removal.

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环糊精和纤维素功能化层状双氢氧化物/还原氧化石墨烯纳米复合材料对硒离子的可持续吸附作用

在本研究中，我们合成了β-环糊精（CD）和羧甲基纤维素（CC）功能化的 LDH/rGO 纳米复合材料，用于在中性 pH 条件下高效吸收硒离子。利用 X 射线衍射 (XRD)、高分辨率透射电子显微镜 (HRTEM)、能量色散 X 射线光谱 (EDAX)、傅立叶变换红外光谱 (FTIR) 和 N2 吸附-解吸分析对纳米复合材料的表面形貌和物理性质进行了表征。进行了平衡吸附实验，以优化关键参数，如接触时间（60-360 分钟）、吸附剂用量（0.01-0.1 克/升）和 pH 值（2-11），从而高效去除硒离子。为分析纳米复合材料的吸附性能，进行了动力学和等温线研究。Langmuir 等温线模型对吸附数据进行了良好的拟合（R2 ≥ 0.99），证实了硒离子在吸附剂表面的单层吸附。计算得出 CC 和 CD 复合物对 Se (IV) 的最大吸附容量分别为 248.75 mg g-1 和 275.48 mg g-1，对 Se (VI) 的最大吸附容量分别为 153.37 mg g-1 和 169.64 mg g-1。此外，还使用伪二阶模型评估了吸附动力学，得出了较高的相关系数（R2 ≥ 0.98）。此外，还研究了吸附机理、再生能力以及共存阴离子的影响。我们的研究结果表明了 CD 和 CC 掺杂 LDH/rGO 生物复合材料在去除硒离子方面的有效性。

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来源期刊

Journal of water process engineering Biochemistry, Genetics and Molecular Biology-Biotechnology

CiteScore

10.70

自引率

8.60%

发文量

846

审稿时长

24 days

期刊介绍： The Journal of Water Process Engineering aims to publish refereed, high-quality research papers with significant novelty and impact in all areas of the engineering of water and wastewater processing . Papers on advanced and novel treatment processes and technologies are particularly welcome. The Journal considers papers in areas such as nanotechnology and biotechnology applications in water, novel oxidation and separation processes, membrane processes (except those for desalination) , catalytic processes for the removal of water contaminants, sustainable processes, water reuse and recycling, water use and wastewater minimization, integrated/hybrid technology, process modeling of water treatment and novel treatment processes. Submissions on the subject of adsorbents, including standard measurements of adsorption kinetics and equilibrium will only be considered if there is a genuine case for novelty and contribution, for example highly novel, sustainable adsorbents and their use: papers on activated carbon-type materials derived from natural matter, or surfactant-modified clays and related minerals, would not fulfil this criterion. The Journal particularly welcomes contributions involving environmentally, economically and socially sustainable technology for water treatment, including those which are energy-efficient, with minimal or no chemical consumption, and capable of water recycling and reuse that minimizes the direct disposal of wastewater to the aquatic environment. Papers that describe novel ideas for solving issues related to water quality and availability are also welcome, as are those that show the transfer of techniques from other disciplines. The Journal will consider papers dealing with processes for various water matrices including drinking water (except desalination), domestic, urban and industrial wastewaters, in addition to their residues. It is expected that the journal will be of particular relevance to chemical and process engineers working in the field. The Journal welcomes Full Text papers, Short Communications, State-of-the-Art Reviews and Letters to Editors and Case Studies