Reactive Blue 19 Adsorption on Activated Carbon From Pumpkin (Cucurbita Pepo) Seed Waste: Kinetic, Isotherm and Thermodynamic Studies

Q3 Environmental Science

Environmental Research, Engineering and Management Pub Date : 2024-04-05 DOI:10.5755/j01.erem.80.1.34243

Yusuf Kızıl, Veysel Benek, İ. Teğin, Yunus Önal, Kadir Erol, İhsan Alacabey

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引用次数: 0

Abstract

In this study, the removal of Reactive Blue 19 dyestuffs in aqueous systems was investigated by adsorption method using activated carbon obtained from the pumpkin seed waste. Activated carbon obtained from pumpkin seed waste functionalized with ZnCl2 was used as an absorbent. Pumpkin seed hydrochar was characterized by FT-IR, SEM, TGA-DTA, BET, and XPS. In the experimental stages, the adsorption equilibrium time was determined as 45 minutes, the adsorbent dosage was 0.8 g and the optimum pH was 6.0. After this step, the adsorption parameters of Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich isotherms were investigated. It has been pointed out that the adsorption process fits better with the Freundlich isotherm model, and the adhesion occurs in a multilayered manner and on a heterogeneous surface. Freundlich and Dubinin-Radushkevich isotherms support that the bonding mechanism is realized by physical interactions. When the kinetic data were evaluated, it was found to be compatible with the pseudo-second-order kinetic model. The thermodynamic parameters of adsorption indicate that the system is endothermic, and the adsorption of Reactive Blue 19 on activated carbon is a spontaneous process.

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活性蓝 19 在南瓜籽废料活性炭上的吸附：动力学、等温线和热力学研究

本研究使用从南瓜籽废料中提取的活性炭，通过吸附法研究了水体系中活性蓝 19 染料的去除情况。南瓜籽废料中的活性炭用 ZnCl2 功能化后用作吸附剂。通过傅立叶变换红外光谱、扫描电镜、TGA-DTA、BET 和 XPS 对南瓜籽水炭进行了表征。在实验阶段，确定吸附平衡时间为 45 分钟，吸附剂用量为 0.8 克，最佳 pH 值为 6.0。之后，研究了 Langmuir、Freundlich、Temkin 和 Dubinin-Radushkevich 等温线的吸附参数。结果表明，吸附过程更符合 Freundlich 等温线模型，而且吸附是以多层方式在异质表面上发生的。Freundlich 等温线和 Dubinin-Radushkevich 等温线证明粘合机制是通过物理相互作用实现的。在对动力学数据进行评估时，发现其与伪二阶动力学模型相一致。吸附的热力学参数表明该体系是内热的，活性蓝 19 在活性炭上的吸附是一个自发过程。

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

Environmental Research, Engineering and Management Environmental Science-Environmental Engineering

CiteScore

2.40

自引率

0.00%

发文量

期刊介绍： First published in 1995, the journal Environmental Research, Engineering and Management (EREM) is an international multidisciplinary journal designed to serve as a roadmap for understanding complex issues and debates of sustainable development. EREM publishes peer-reviewed scientific papers which cover research in the fields of environmental science, engineering (pollution prevention, resource efficiency), management, energy (renewables), agricultural and biological sciences, and social sciences. EREM’s topics of interest include, but are not limited to, the following: environmental research, ecological monitoring, and climate change; environmental pollution – impact assessment, mitigation, and prevention; environmental engineering, sustainable production, and eco innovations; environmental management, strategy, standards, social responsibility; environmental economics, policy, and law; sustainable consumption and education.