Waste biomass-based graphene oxide decorated with ternary metal oxide (MnO-NiO-ZnO) composite for adsorption of methylene blue dye

Cleaner Water Pub Date : 2024-10-18 DOI:10.1016/j.clwat.2024.100049

Priyanka Barooah , Nituraj Mushahary , Bipul Das , Sanjay Basumatary

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Abstract

In this study, a novel approach for the removal of methylene blue (MB) dye is effectively illustrated by using biomass based composite adsorbent. The investigation employed areca nut husk (AH) to produce graphene oxide (GO) by a single step calcination method. Thereafter, AH-GO was incorporated by using ternary metal oxide (TMO) via hydrothermal treatment. The developed AH-GO@MnO-NiO-ZnO composite was characterized by various analytical techniques, including FT-IR, XRD, FESEM, HRTEM, BET surface area and Raman spectroscopy which exhibited promising properties for dye adsorption. To study the adsorption efficiency of prepared composite, optimization experiments were performed for adsorbent dose, initial dye concentration and contact time. The optimized parameters during adsorption phenomenon were found to be 0.5 g/L of dose, 20 mg/L of initial concentration and 180 min of time exhibiting removal efficacy of 93.05 ± 0.93 %. Moreover, adsorption isotherm and kinetic models were analysed to explore the adsorption behaviour of AH-GO@MnO-NiO-ZnO towards MB dye. The adsorption isotherm and kinetic studies followed Langmuir isotherm model and pseudo-second-order (PSO) model respectively. AH-GO@MnO-NiO-ZnO has demonstrated a maximum adsorption capability of 127.06 mg/g. These findings collectively underscore the potential of AH-based adsorbent as a viable, inexpensive, and environment friendly for the treatment of wastewater contaminated with MB dye.

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废弃生物质基氧化石墨烯装饰三元金属氧化物（MnO-NiO-ZnO）复合材料用于吸附亚甲基蓝染料

在本研究中，使用基于生物质的复合吸附剂有效地说明了一种去除亚甲基蓝（MB）染料的新方法。该研究利用山苍子壳（AH）通过一步煅烧法生成氧化石墨烯（GO）。随后，通过水热处理，使用三元金属氧化物（TMO）将 AH-GO 融合在一起。所开发的 AH-GO@MnO-NiO-ZnO 复合材料通过各种分析技术进行了表征，包括傅立叶变换红外光谱、XRD、FESEM、HRTEM、BET 表面积和拉曼光谱。为了研究制备的复合材料的吸附效率，对吸附剂剂量、初始染料浓度和接触时间进行了优化实验。结果发现，吸附过程中的优化参数为 0.5 克/升的剂量、20 毫克/升的初始浓度和 180 分钟的接触时间，其去除率为 93.05 ± 0.93 %。此外，还分析了吸附等温线和动力学模型，以探讨 AH-GO@MnO-NiO-ZnO 对 MB 染料的吸附行为。吸附等温线和动力学研究分别遵循 Langmuir 等温线模型和伪二阶（PSO）模型。AH-GO@MnO-NiO-ZnO 的最大吸附能力为 127.06 mg/g。这些发现共同证明了 AH 吸附剂作为一种可行、廉价且环保的吸附剂处理受甲基溴染料污染的废水的潜力。

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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Cleaner Water

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