Prospective application of eco-friendly banana peel reduced graphene oxide (BRGO) for aqueous Cr (VI) and acid dye adsorption: A waste utilization approach

Q1 Environmental Science

Bioresource Technology Reports Pub Date : 2024-08-15 DOI:10.1016/j.biteb.2024.101936

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引用次数: 0

Abstract

Banana peels are an environmentally benign alternative to toxic reducing agents. Banana peel-reduced graphene oxide (BRGO) showed high performance in the adsorption of metal and dye ions. Fourier transform infrared (FTIR), scanning electron microscopy (SEM), X-ray diffraction (XRD), thermogravimetric analysis (TGA), and a Zeta potential analyzer were used to characterize the BRGO. Different influencing factors such as pH, dose, concentration, duration, and temperature, were studied to evaluate the efficiency of the adsorbent. The Langmuir and Freundlich isotherm models were fitted for Cr (VI) and acid dye adsorption. The maximum adsorption capacity (q_m) of BRGO for Cr (VI) and AV54 dye were 135.87 and 110.74 mg/g, respectively. The pseudo-second-order kinetic model was better suited for Cr (VI) and AV54 dye adsorption, which indicated chemical adsorption. Thermodynamically, the adsorption exhibited spontaneity and was endothermic. Regeneration and reuse of adsorbents were also studied for potential use in treating tannery effluent.

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环保型香蕉皮还原氧化石墨烯 (BRGO) 在吸附水性六价铬和酸性染料方面的应用前景：废物利用方法

香蕉皮是有毒还原剂的环保替代品。香蕉皮还原氧化石墨烯（BRGO）在吸附金属和染料离子方面表现出很高的性能。研究人员利用傅立叶变换红外光谱（FTIR）、扫描电子显微镜（SEM）、X 射线衍射（XRD）、热重分析（TGA）和 Zeta 电位分析仪对 BRGO 进行了表征。研究了不同的影响因素，如 pH 值、剂量、浓度、持续时间和温度，以评估吸附剂的效率。对 Cr (VI) 和酸性染料的吸附分别拟合了 Langmuir 和 Freundlich 等温线模型。BRGO 对六价铬和 AV54 染料的最大吸附容量（qm）分别为 135.87 和 110.74 mg/g。假二阶动力学模型更适合于铬（VI）和 AV54 染料的吸附，这表明是化学吸附。从热力学角度看，吸附表现出自发性和内热性。还对吸附剂的再生和再利用进行了研究，以了解其在处理制革废水中的潜在用途。

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

Bioresource Technology Reports Environmental Science-Environmental Engineering

CiteScore

7.20

自引率

0.00%

发文量

390

审稿时长

28 days