Investigation on the adsorption of the carbamate pesticide methomyl from aqueous solution using modified co-beta zeolite particles

IF 1.4 4区材料科学 Q3 MATERIALS SCIENCE, CERAMICS

Science of Sintering Pub Date : 2023-01-01 DOI:10.2298/sos220618004s

Predrag Stojisavljević, Nikolina Vulovic, Z. Veličković, D. Mijin, S. Stupar, Denis Dinić, Negovan Ivanković

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Abstract

Adsorption of carbamate pesticide Methomyl by Co-Beta Zeolite particles prepared by wet ion-exchange method from aqueous solutions was studied. The effect of zeolite and pesticide concentrations, pH value, and sintering temperature on pesticide removal from an aqueous solution was studied. The change of methomyl concentration during the adsorption was followed using the UV-Visible spectrophotometer. Scanning Electron Microscopy-Energy Dispersive X-ray Spectroscopy (SEM-EDS) revealed the modified zeolite morphology and elemental structure. The change of the adsorbent surface before and after dye removal was observed using the Fourier Transformation-infrared spectroscopy (FT-IR). The adsorption kinetics follows the pseudo-second-order kinetics model, and at optimal condition adsorption rate is k1 = 0.0166 g mg-1 min-1. The Langmuir, Freundlich, Temkin and Dubinin-Radushkovich adsorption isotherm models were used to describe the adsorption process. Thermodynamic parameters were also determined using experimental data. The thermodynamic study indicates that during pesticide adsorption is, chemisorption and physisorption are present at the same.

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改性共沸石对氨基甲酸酯类农药灭多威的吸附研究

研究了湿离子交换法制备的co - β沸石对氨基甲酸酯类农药灭多威的吸附性能。研究了沸石、农药浓度、pH值和烧结温度对水溶液中农药去除率的影响。用紫外可见分光光度计观察灭多威在吸附过程中的浓度变化。扫描电子显微镜-能量色散x射线能谱(SEM-EDS)分析了改性沸石的形态和元素结构。利用傅里叶变换红外光谱(FT-IR)观察了脱除染料前后吸附剂表面的变化。吸附动力学遵循准二级动力学模型，最佳条件下吸附速率为k1 = 0.0166 g mg-1 min-1。采用Langmuir、Freundlich、Temkin和Dubinin-Radushkovich等温吸附模型描述了吸附过程。并根据实验数据确定了热力学参数。热力学研究表明，在农药吸附过程中，化学吸附和物理吸附同时存在。

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来源期刊

Science of Sintering 工程技术-材料科学：硅酸盐

CiteScore

2.50

自引率

46.70%

发文量

审稿时长

3.3 months

期刊介绍： Science of Sintering is a unique journal in the field of science and technology of sintering. Science of Sintering publishes papers on all aspects of theoretical and experimental studies, which can contribute to the better understanding of the behavior of powders and similar materials during consolidation processes. Emphasis is laid on those aspects of the science of materials that are concerned with the thermodynamics, kinetics and mechanism of sintering and related processes. In accordance with the significance of disperse materials for the sintering technology, papers dealing with the question of ultradisperse powders, tribochemical activation and catalysis are also published. Science of Sintering journal is published four times a year. Types of contribution: Original research papers, Review articles, Letters to Editor, Book reviews.