Innovative chitosan based membrane for sustainable Cr(VI) adsorption and CO2 Sequestration: RSM optimization

IF 5.3 2区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Molecular Liquids Pub Date : 2025-05-14 DOI:10.1016/j.molliq.2025.127791

Tejaswini A. Rathi , Vaishnavi Gomase , D. Saravanan , Ravin Jugade

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引用次数: 0

Abstract

This research presents the development and application of a novel ACACs membrane for the efficient removal of Cr(VI) and CO₂ capture. The membrane was synthesized through a green, sustainable method, ensuring its environmental compatibility. A series of characterization techniques, including FTIR, SEM, BET surface area analysis, XRD, and thermal analysis, confirmed the membrane’s structural stability, functional group modifications, and high surface area (66.98 m² g⁻¹), which are key to its outstanding adsorption performance. Optimization of various factors was performed to enhance adsorption efficiency. The adsorption kinetics conformed to the pseudo-second-order model (R² = 0.978), while the isotherm data fit well with the Langmuir model (R² = 0.985), with a maximum capacity of 271.44 mg g⁻¹. Thermodynamic analysis suggested that the adsorption process is spontaneous, exothermic, and driven by enthalpy, further emphasizing the membrane’s strong performance across different conditions. Response Surface Methodology helps the systematic optimization of experimental parameters, leading to valid adsorption outcomes. Regeneration studies emphasized the membrane’s excellent reusability, with minimal loss in performance over five cycles, proving its cost-effectiveness and sustainability. Real water samples were also studied, demonstrating the real effectiveness of the membrane in complex environmental matrices. It was tested for real water from Siyaram Textile Industries, the membrane achieved a removal efficiency of 58.18 %. Meanwhile, for the Raymond MIDC water sample, the removal efficiency reached 60.41 %. Beyond Cr(VI) removal, the ACACs membrane also exhibited significant potential for CO₂ adsorption, with a maximum capacity of 28.95 cc g⁻¹ at 273 K, showcasing its dual-functionality for environmental remediation and carbon capture. The dual application of Cr(VI) and CO₂ exclusion within a single membrane underscores its adaptability and aligns with sustainable progress goals. Overall, the ACACs membrane proves an efficient, durable, and eco-friendly solution to pressing environmental issues, with the potential for scalable, real-world applications.

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新型壳聚糖基膜可持续吸附Cr（VI）和CO2: RSM优化

本研究介绍了一种新型ACACs膜的开发和应用，用于高效去除Cr（VI）和捕获CO2。该膜通过绿色、可持续的方法合成，确保了其环境相容性。FTIR、SEM、BET表面积分析、XRD和热分析等一系列表征技术证实了膜的结构稳定性、官能团修饰和高比表面积（66.98 m2 g−1），这是其优异吸附性能的关键。对各因素进行优化，以提高吸附效率。吸附动力学符合拟二阶模型（R2 = 0.978），等温线数据符合Langmuir模型（R2 = 0.985），最大吸附量为271.44 mg g−1。热力学分析表明，吸附过程是自发的、放热的、由焓驱动的，进一步强调了膜在不同条件下的强性能。响应面法有助于系统地优化实验参数，从而得到有效的吸附结果。再生研究强调了膜的优异的可重复使用性，在五个循环中性能损失最小，证明了其成本效益和可持续性。实际水样也进行了研究，证明了膜在复杂环境基质中的真正有效性。对Siyaram纺织工业的真水进行了测试，该膜的去除率为58.18%。同时，对于Raymond MIDC水样，去除率达到60.41%。除了去除Cr（VI）外，ACACs膜还具有显著的CO2吸附潜力，在273 K下的最大容量为28.95 cc g−1，显示了其环境修复和碳捕获的双重功能。Cr（VI）和CO2在单一膜内的双重应用强调了其适应性，并与可持续发展目标保持一致。总的来说，ACACs膜被证明是一种高效、耐用、环保的解决方案，可以解决紧迫的环境问题，具有可扩展的实际应用潜力。

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

Journal of Molecular Liquids 化学-物理：原子、分子和化学物理

CiteScore

10.30

自引率

16.70%

发文量

2597

审稿时长

78 days

期刊介绍： The journal includes papers in the following areas: – Simple organic liquids and mixtures – Ionic liquids – Surfactant solutions (including micelles and vesicles) and liquid interfaces – Colloidal solutions and nanoparticles – Thermotropic and lyotropic liquid crystals – Ferrofluids – Water, aqueous solutions and other hydrogen-bonded liquids – Lubricants, polymer solutions and melts – Molten metals and salts – Phase transitions and critical phenomena in liquids and confined fluids – Self assembly in complex liquids.– Biomolecules in solution The emphasis is on the molecular (or microscopic) understanding of particular liquids or liquid systems, especially concerning structure, dynamics and intermolecular forces. The experimental techniques used may include: – Conventional spectroscopy (mid-IR and far-IR, Raman, NMR, etc.) – Non-linear optics and time resolved spectroscopy (psec, fsec, asec, ISRS, etc.) – Light scattering (Rayleigh, Brillouin, PCS, etc.) – Dielectric relaxation – X-ray and neutron scattering and diffraction. Experimental studies, computer simulations (MD or MC) and analytical theory will be considered for publication; papers just reporting experimental results that do not contribute to the understanding of the fundamentals of molecular and ionic liquids will not be accepted. Only papers of a non-routine nature and advancing the field will be considered for publication.