钼酸镁：一种从水溶液中去除亚甲基蓝阳离子染料的高效纳米吸附剂。

Magnesium Molybdate: An Efficient Nanosorbent for Methylene Blue Cationic Dye Removal from Aqueous Solutions.

作者信息

Mohmoud Ahmed, Rakass Souad, Oudghiri Hassani Hicham, Popoola Saheed A, Kooli Fethi, Assirey Eman, Abboudi Mostafa

机构信息

Chemistry Department, Faculty of Science, Taibah University, Madinah 30002, Saudi Arabia.

Laboratory of Applied Organic Chemistry (LCOA), Chemistry Department, Faculty of Sciences and Techniques, Sidi Mohamed Ben Abdellah University, Imouzzer Road, P.O. Box 2202, Fez 30000, Morocco.

出版信息

Molecules. 2025 Apr 3;30(7):1606. doi: 10.3390/molecules30071606.

DOI:10.3390/molecules30071606

PMID:40286208

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11990220/

Abstract

The removal of methylene blue (MB) cationic dye from aqueous solutions was investigated by applying magnesium molybdate (β-MgMoO) as a nanosorbent. The β-MgMoO was synthesized through a simple, rapid, and efficient method. The MB dye removal process was optimized by evaluating various parameters such as temperature, contact time, nanosorbent dosage, pH, and initial cationic dye concentration. The optimal conditions for MB removal were found to be pH 3, with a 99% removal efficiency achieved in just 10 min of contact time, when using an MB cationic dye concentration of 160 ppm. Magnesium molybdate (β-MgMoO) showed a maximum adsorption capacity of 356 mg/g, according to Langmuir model-based calculations. The MB dye removal process occurred spontaneously while being favorable and endothermic. The kinetic investigation showed that the pseudo-second-order model accurately represented the reaction kinetics. The thermal regeneration test results indicated that the removal efficiency remained stable even after three consecutive rounds of reuse. A Fourier Transform Infrared (FTIR) spectroscopic analysis confirmed the adsorption and desorption of MB on β-MgMoO and its regeneration. Overall, these results indicate that a β-MgMoO nanosorbent is a favorable and robust adsorbent for the removal of MB cationic dye from wastewater at its maximum capacity.

摘要

通过应用钼酸镁（β-MgMoO）作为纳米吸附剂，研究了从水溶液中去除亚甲基蓝（MB）阳离子染料的方法。β-MgMoO通过一种简单、快速且高效的方法合成。通过评估温度、接触时间、纳米吸附剂用量、pH值和初始阳离子染料浓度等各种参数，对MB染料去除过程进行了优化。发现去除MB的最佳条件是pH值为3，当使用160 ppm的MB阳离子染料浓度时，只需10分钟的接触时间就能达到99%的去除效率。根据基于朗缪尔模型的计算，钼酸镁（β-MgMoO）的最大吸附容量为356 mg/g。MB染料去除过程是自发进行的，且是有利的吸热过程。动力学研究表明，准二级模型准确地描述了反应动力学。热再生测试结果表明，即使经过三轮连续重复使用，去除效率仍保持稳定。傅里叶变换红外（FTIR）光谱分析证实了MB在β-MgMoO上的吸附、解吸及其再生。总体而言，这些结果表明，β-MgMoO纳米吸附剂是一种有利且强大的吸附剂，能够以其最大容量从废水中去除MB阳离子染料。