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Biogenic nanozirconium in hydrogel beads for fluoride removal: equilibrium, thermodynamic and kinetic studies
Indian Journal of Chemical Technology ( IF 0.5 ) Pub Date : 2020-09-22
Anushree Srivastava, Madhu Kumari, Kumar Suranjit Prasad

In the present research work, removal of fluoride from aqueous solution using fenugreek leaf mediated Zr nanoparticle entrapped in calcium alginate beads has been attempted. The adsorption study for removal of fluoride from aqueous solution of defined concentrations has been carried out in batch mode followed by its estimation using ion-chromatography. Synthesized Zr nanoparticles are subjected to various analyses e.g. SEM, TEM, SAED EDAX and FTIR, revealing zirconium an integral component. The adsorption capacity of Zr entrapped calcium alginate beads for fluoride is found to be 90.90 mg/g. The Langmuir isotherm model best fits on equilibrium data since it provides higher R2 value than Freundlich model similarly, pseudo-second order kinetic model could better explain adsorption kinetic in comparison to pseudo first order model by presenting better correlation coefficient. The overall study suggests that Zr nanoparticles entrapped in alginate beads could be a better candidate for removal of fluoride from aqueous solution.

中文翻译:

水凝胶珠中的生物纳米锆用于除氟:平衡,热力学和动力学研究

在当前的研究工作中,已经尝试使用胡芦巴叶介导的藻酸盐钙珠中包埋的胡芦巴叶介导的Zr纳米颗粒从水溶液中去除氟化物以分批方式进行了吸附研究,以从规定浓度的水溶液中除去氟化物,然后使用离子色谱法对其进行估算。对合成的Zr纳米粒子进行各种分析,例如SEM,TEM,SAED EDAX和FTIR,这表明锆是不可或缺的成分。发现Zr截留的藻酸钙珠粒对氟化物的吸附容量为90.90 mg / g。Langmuir等温模型最适合平衡数据,因为它提供了更高的 R 2与Freundlich模型相比,伪二阶动力学模型具有更好的相关系数,因此与伪一阶动力学模型相比,伪二阶动力学模型可以更好地解释吸附动力学。总体研究表明,困在藻酸盐珠粒中的Zr纳米粒子可能是从水溶液中去除氟化物的更好候选者。
更新日期:2020-09-22
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