The enhanced adsorption properties of phosphorus from aqueous solutions using lanthanum modified synthetic zeolites

IF 3.8 4区工程技术 Q2 CHEMISTRY, MULTIDISCIPLINARY Green Processing and Synthesis Pub Date : 2023-01-01 DOI:10.1515/gps-2023-0106

Dongsheng He, Beibei Chen, Yuan Tang, Qianqian Li, Kecheng Zhang, Zhili Li, Changming Xu

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Abstract

Abstract In this study, a modified synthetic zeolite adsorbent was synthesized by the hydrothermal method using coal fly ash as the main raw material, and the enhanced phosphorus adsorption properties from aqueous solutions were then evaluated. The modification parameters were specifically studied and optimized. Moreover, the effects of initial phosphorus concentration, adsorption time, and pH value on phosphorus absorption were also investigated. The adsorbent was characterized by the energy-dispersive spectrometer analysis, scanning electron microscopy, and Fourier transform infrared spectroscopy. Furthermore, the phosphorus adsorption properties of the zeolite adsorbent were preliminarily discussed through the perspectives of isothermal adsorption experiments, adsorption kinetics experiments, and adsorption thermodynamics calculations. The results show that the lanthanum ions were physically loaded on the surface and micropores of the adsorbent after modification, which helps to enhance the adsorption effect of phosphorus components from the aqueous solution. The phosphorus removal rate has been increased by about 65%. The adsorption process better fitted the Langmuir and Elovich equations. The theoretical calculation and analysis of adsorption thermodynamics showed that the adsorption and removal of phosphorus in water happens spontaneously.

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镧修饰的合成沸石对水溶液中磷的吸附性能增强

摘要以粉煤灰为主要原料，采用水热法合成了一种改性的合成沸石吸附剂，并对其水溶液中磷的增强吸附性能进行了评价。对改性参数进行了具体研究和优化。此外，还考察了初始磷浓度、吸附时间和pH值对磷吸附的影响。通过能谱分析、扫描电镜和傅里叶变换红外光谱对吸附剂进行了表征。并从等温吸附实验、吸附动力学实验、吸附热力学计算等方面对沸石吸附剂对磷的吸附性能进行了初步探讨。结果表明，改性后的吸附剂表面和微孔上物理负载了镧离子，有利于提高对水溶液中磷组分的吸附效果。除磷率提高了65%左右。吸附过程较好地符合Langmuir和Elovich方程。吸附热力学的理论计算和分析表明，磷在水中的吸附和去除是自发进行的。

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来源期刊

Green Processing and Synthesis CHEMISTRY, MULTIDISCIPLINARY-ENGINEERING, CHEMICAL

CiteScore

6.70

自引率

9.30%

发文量

审稿时长

7 weeks

期刊介绍： Green Processing and Synthesis is a bimonthly, peer-reviewed journal that provides up-to-date research both on fundamental as well as applied aspects of innovative green process development and chemical synthesis, giving an appropriate share to industrial views. The contributions are cutting edge, high-impact, authoritative, and provide both pros and cons of potential technologies. Green Processing and Synthesis provides a platform for scientists and engineers, especially chemists and chemical engineers, but is also open for interdisciplinary research from other areas such as physics, materials science, or catalysis.