Battas A, Gaidoumi A El, Ksakas A, Kherbeche A
Laboratory of Catalysis, Materials and Environment, Higher School of Technology, Sidi Mohamed Ben Abdellah University, 30000 Fez, Morocco.
ScientificWorldJournal. 2019 Feb 3;2019:9529618. doi: 10.1155/2019/9529618. eCollection 2019.
Our research aimed at the removal of nitrate ions through adsorption by local clay. A series of batch experiments were conducted to examine the effects of contact time, adsorbent characteristics, initial concentration of nitrate, pH of the solution, concentration, and granulometry of adsorbent. Adsorption isotherms studies indicated that local clay satisfies Freundlich's model. The rate of reaction follows pseudo-second-order kinetics. Local clay successfully adsorbs nitrates at pH acid. The adsorption capacity under optimal conditions was found to be 5.1 mg/g. The adsorption yield increases with adsorbent dose and decrease with initial concentration of nitrate. The local clay was characterized by the X-ray fluorescence method (XRF), X-ray diffraction (XRD), Fourier transform-infrared spectroscopy (FTIR), scanning electronics microscopy (SEM), and measurement of specific surface area (BET). The results of the study indicated that local clay is useful materials for the removal of nitrates from aqueous solutions which can be used in water treatment without any chemical modification.
我们的研究旨在通过当地黏土吸附去除硝酸根离子。进行了一系列批量实验，以研究接触时间、吸附剂特性、硝酸盐初始浓度、溶液pH值、吸附剂浓度和粒度的影响。吸附等温线研究表明，当地黏土符合弗伦德利希模型。反应速率遵循准二级动力学。当地黏土在酸性pH值下成功吸附硝酸盐。在最佳条件下的吸附容量为5.1毫克/克。吸附产率随吸附剂剂量增加而增加，随硝酸盐初始浓度降低而降低。通过X射线荧光法（XRF）、X射线衍射（XRD）、傅里叶变换红外光谱（FTIR）、扫描电子显微镜（SEM）和比表面积测量（BET）对当地黏土进行了表征。研究结果表明，当地黏土是从水溶液中去除硝酸盐的有用材料，无需任何化学改性即可用于水处理。
