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钼酸亚铁（Fe(MoO)）纳米颗粒：从水溶液中去除亚甲基蓝染料的高效吸附剂。

Iron Molybdate Fe(MoO) Nanoparticles: Efficient Sorbent for Methylene Blue Dye Removal from Aqueous Solutions.

机构信息

Petroleum Technology, Operated Offshore Oil Field Development, Qatar Petroleum, Doha P.O. Box 3212, Qatar.

Department of Chemistry, Faculty of Science, Taibah University, Al-Madinah Al-Munawarah P.O. Box 30002, Saudi Arabia.

出版信息

Molecules. 2020 Nov 3;25(21):5100. doi: 10.3390/molecules25215100.

DOI:10.3390/molecules25215100
PMID:33153124
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7663641/
Abstract

The present study investigated iron molybdate (Fe(MoO)), synthesized via a simple method, as a nanosorbent for methylene blue (MB) dye removal from aqueous solutions. Investigations of the effects of several parameters like contact time, adsorbent dose, initial dye concentration, temperature and pH were carried out. The results showed that MB removal was affected, significantly, by adsorbent dose and pH. Interestingly, lower values of adsorbent dose resulted in the removal of higher amounts of MB. At the optimum pH, the removal efficiency of 99% was gained with an initial MB concentration of ≤60 ppm. The kinetic study specified an excellent correlation of the experimental results with the pseudo-second-order kinetics model. Thermodynamic studies proved a spontaneous, favorable and endothermic removal. The maximum amount of removal capacity of MB dye was 6173 mg/g, which was determined from the Langmuir model. The removal efficiency was shown to be retained after three cycles of reuse, as proven by thermal regeneration tests. The presence and adsorption of the dye onto the Fe(MoO) nanoparticle surface, as well as the regeneration of the latter, was ascertained by scanning electron microscopy (SEM) and Fourier-transform infrared spectroscopy (FTIR). These findings are indicative that the investigated nanosorbent is an excellent candidate for the removal of MB in wastewater.

摘要

本研究通过简单的方法合成了钼酸亚铁（Fe（MoO）），将其用作纳米吸附剂，从水溶液中去除亚甲基蓝（MB）染料。考察了接触时间、吸附剂剂量、初始染料浓度、温度和 pH 等几个参数的影响。结果表明，吸附剂剂量和 pH 显著影响 MB 的去除。有趣的是，较低的吸附剂剂量导致 MB 的去除量更高。在最佳 pH 值下，初始 MB 浓度≤60ppm 时，去除效率达到 99%。动力学研究表明，实验结果与准二级动力学模型具有极好的相关性。热力学研究证明，去除过程是自发、有利和吸热的。从 Langmuir 模型中确定了 MB 染料的最大去除容量为 6173mg/g。通过热再生试验证明，在重复使用三次后，去除效率得以保留。通过扫描电子显微镜（SEM）和傅里叶变换红外光谱（FTIR）证实了染料在 Fe（MoO）纳米颗粒表面的存在和吸附以及后者的再生。这些发现表明，所研究的纳米吸附剂是去除废水中 MB 的理想候选材料。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8349/7663641/f5433987beec/molecules-25-05100-g014.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8349/7663641/ed6112bf8062/molecules-25-05100-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8349/7663641/fcbf7e6c56c1/molecules-25-05100-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8349/7663641/dc76d9753c23/molecules-25-05100-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8349/7663641/828f99ee15f4/molecules-25-05100-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8349/7663641/716fbf8e334d/molecules-25-05100-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8349/7663641/cd5e6d4be6b9/molecules-25-05100-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8349/7663641/541ad3e80d02/molecules-25-05100-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8349/7663641/1dd575440ea6/molecules-25-05100-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8349/7663641/f8ab479ee9e8/molecules-25-05100-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8349/7663641/12f6c64630a8/molecules-25-05100-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8349/7663641/b489a679b360/molecules-25-05100-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8349/7663641/61cf24a727b4/molecules-25-05100-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8349/7663641/b83a3209b642/molecules-25-05100-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8349/7663641/f5433987beec/molecules-25-05100-g014.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8349/7663641/ed6112bf8062/molecules-25-05100-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8349/7663641/fcbf7e6c56c1/molecules-25-05100-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8349/7663641/dc76d9753c23/molecules-25-05100-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8349/7663641/828f99ee15f4/molecules-25-05100-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8349/7663641/716fbf8e334d/molecules-25-05100-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8349/7663641/cd5e6d4be6b9/molecules-25-05100-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8349/7663641/541ad3e80d02/molecules-25-05100-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8349/7663641/1dd575440ea6/molecules-25-05100-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8349/7663641/f8ab479ee9e8/molecules-25-05100-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8349/7663641/12f6c64630a8/molecules-25-05100-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8349/7663641/b489a679b360/molecules-25-05100-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8349/7663641/61cf24a727b4/molecules-25-05100-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8349/7663641/b83a3209b642/molecules-25-05100-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8349/7663641/f5433987beec/molecules-25-05100-g014.jpg

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