Koshlak Hanna
Department of Sanitary Engineering, Kielce University of Technology, Aleja Tysiąclecia Państwa Polskiego, 7, 25-314 Kielce, Poland.
Materials (Basel). 2023 Jul 5;16(13):4837. doi: 10.3390/ma16134837.
The article presents studies of the influence of parameters of synthesis modes and alkali concentration on the synthesis of zeolite materials from coal fly ash (CFA). The purpose of the study was to synthesise zeolite materials from CFA using the method of alkaline fusion and to determine the susceptibility of selected heavy-metal ions to removal from solutions in an ion exchange process on a selected mesoporous zeolite. It was found that the crystalline phase of sodalite was dominated in all of the samples synthesized. The specific surface area (S) of the samples was evaluated using the standard Brunauer-Emmett-Teller (BET) method using N sorption. Crystalline zeolite materials have been used to study the efficiency of removing heavy metals from aqueous solutions of Ni, Cd and Pb. The adsorption data were analyzed using the Langmuir and Freundlich isotherm model. When comparing the estimated coefficient of determination (r), it was noticed that the sorption data are more accurately described by the Langmuir isotherm and the pseudo-second-order kinetic model. The results of metal adsorption experiments suggest that the synthesized zeolite material has great potential to be used as an inexpensive and alternative source in the production of adsorbents.
本文介绍了合成模式参数和碱浓度对从粉煤灰（CFA）合成沸石材料的影响的研究。该研究的目的是采用碱熔融法从CFA合成沸石材料，并确定在选定的介孔沸石上进行离子交换过程时，选定的重金属离子从溶液中去除的敏感性。结果发现，在所有合成样品中，方钠石的晶相占主导地位。使用标准的布鲁瑙尔-埃米特-特勒（BET）方法，通过N吸附来评估样品的比表面积（S）。结晶沸石材料已被用于研究从Ni、Cd和Pb的水溶液中去除重金属的效率。使用朗缪尔和弗伦德利希等温线模型分析吸附数据。在比较估计的决定系数（r）时，注意到吸附数据用朗缪尔等温线和伪二级动力学模型能更准确地描述。金属吸附实验结果表明，合成的沸石材料有很大潜力可作为吸附剂生产中一种廉价的替代来源。
