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Preparation of new h-MoO3 rod-like microcrystals for effective removal of cationic dye in aqueous solution
International Journal of Environmental Research ( IF 2.6 ) Pub Date : 2021-01-03 , DOI: 10.1007/s41742-020-00301-1
Marcel Leiner de Sá , Francisco Xavier Nobre , Lucinaldo dos Santos Silva , Giancarlo da Silva Sousa , Mitsuo Lopes Takeno , Edgar Alves Araújo Júnior , José Milton Elias de Matos , Maria Rita Morais Chaves de Santos

h-MoO3 rod-like microcrystals were successfully prepared using the hydrothermal microwave method and evaluated as an adsorbent for MB dye’s adsorption from an aqueous medium. The metastable phase with hexagonal structure (h-MoO3) was well confirmed by X-ray diffraction (XRD) and Raman spectroscopy. FE-SEM images of these microcrystals confirm the rod-like morphology for all microcrystals synthesized. The better adjustment of the experimental data in the adsorption kinetics study was adjusted using the pseudo-first-order model, being k1 = 0.0049 min−1, qe,cal = 99.90 mg g−1, and R2 = 0.9975. These microcrystals exhibit a high adsorption rate of MB dye in the pH interval from 4.0 to 11.0. In general, for different temperatures (298 K, 308 K, and 318 K), the experimental data were better adjusted with the Temkin isotherm model, being the process of adsorption was favorable and spontaneous. In addition, the h-MoO3-1 h rod-like microcrystals may be regenerated effectively and reused for adsorption of MB with good adsorption performance at least four times, being promising material in the adsorption of this organic pollutant in aqueous solution. h-MoO3 rod-like microcrystals The adsorbent matrix (h-MoO3 rod-like microcrystals) was used in the removal of methylene blue (MB) in aqueous medium Adsorption of organic contaminant (MB) using the adsorbent matrix (h-MoO3 rod-like microcrystals) was researched including kinetic, equilibrium and thermodynamic study h-MoO3 rod-like microcrystals The adsorbent matrix (h-MoO3 rod-like microcrystals) was used in the removal of methylene blue (MB) in aqueous medium Adsorption of organic contaminant (MB) using the adsorbent matrix (h-MoO3 rod-like microcrystals) was researched including kinetic, equilibrium and thermodynamic study

中文翻译:

用于有效去除水溶液中阳离子染料的新型 h-MoO3 棒状微晶的制备

使用水热微波法成功制备了 h-MoO3 棒状微晶,并评估其作为从水性介质中吸附 MB 染料的吸附剂。X 射线衍射 (XRD) 和拉曼光谱证实了具有六方结构 (h-MoO3) 的亚稳态相。这些微晶的 FE-SEM 图像证实了所有合成的微晶的棒状形态。吸附动力学研究中实验数据的更好调整使用伪一级模型进行调整,即 k1 = 0.0049 min-1,qe,cal = 99.90 mg g-1 和 R2 = 0.9975。这些微晶在 4.0 到 11.0 的 pH 区间内表现出对 MB 染料的高吸附率。一般来说,对于不同的温度(298 K、308 K和318 K),实验数据最好用Temkin等温线模型进行调整,吸附过程是有利的和自发的。此外,h-MoO3-1 h棒状微晶可以有效再生并重新用于吸附至少四次具有良好吸附性能的MB,是在水溶液中吸附这种有机污染物的有前途的材料。h-MoO3 棒状微晶 吸附剂基质(h-MoO3 棒状微晶)用于去除水性介质中的亚甲蓝 (MB) 使用吸附剂基质 (h-MoO3 棒状) 吸附有机污染物 (MB)像微晶)被研究,包括动力学,
更新日期:2021-01-03
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