Performance of vermicompost derived hydrochars for methylene blue removal via ultrasound assisted adsorption

IF 2.5 4区化学 Q2 Engineering Chemical Papers Pub Date : 2024-11-15 DOI:10.1007/s11696-024-03777-9

Eyup Yildirir

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Abstract

This study investigated the ultrasound-assisted adsorption of methylene blue (MB) onto vermicompost (VC) derived hydrochars prepared at different hydrothermal treatment temperatures (220, 250, and 280 °C). The effects of pH, time, and initial concentration on the adsorption process were evaluated. The kinetic and isotherm models were applied to fit the experimental data. The results showed that the VC hydrochars exhibited superior adsorption capacity for MB under alkaline conditions. The adsorption process was influenced by chemical interactions between the MB molecules and the surface of hydrochars, and the adsorption process was irreversible chemisorption. VC220 hydrochar demonstrated the highest adsorption capacity for MB, followed by VC250 and VC280 hydrochars. The Pseudo Second Order kinetic model and Langmuir isotherm model provided the best fits to the experimental data. This suggests that the adsorption of MB onto VC hydrochars follows a second-order reaction mechanism and monolayer adsorption process with high adsorption capacities.

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超声辅助吸附去除亚甲基蓝的蚯蚓堆肥水炭性能研究

研究了不同水热处理温度（220、250和280℃）下制备的蠕虫堆肥（VC）衍生的水合物对亚甲基蓝（MB）的超声辅助吸附。考察了pH、时间和初始浓度对吸附过程的影响。采用动力学模型和等温线模型拟合实验数据。结果表明，VC烃类在碱性条件下对MB具有较好的吸附能力。吸附过程受MB分子与烃类表面化学相互作用的影响，吸附过程为不可逆化学吸附。对MB的吸附量最大的是VC220，其次是VC250和VC280。拟二阶动力学模型和Langmuir等温线模型与实验数据拟合最好。这表明甲基溴在VC烃类上的吸附遵循二级反应机制和具有高吸附容量的单层吸附过程。图形抽象

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来源期刊

Chemical Papers Chemical Engineering-General Chemical Engineering

CiteScore

3.30

自引率

4.50%

发文量

590

期刊介绍： Chemical Papers is a peer-reviewed, international journal devoted to basic and applied chemical research. It has a broad scope covering the chemical sciences, but favors interdisciplinary research and studies that bring chemistry together with other disciplines.