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双氯芬酸钠在功能化坡缕石粘土中的吸附

Adsorption of Sodium Diclofenac in Functionalized Palygoskite Clays.

作者信息

Sousa Matheus Urtiga, Rodrigues Alisson Mendes, Araujo Maria Eduarda Barbosa, Menezes Romualdo Rodrigues, Neves Gelmires Araújo, Lira Hélio Lucena

机构信息

Graduate Program in Materials Science and Engineering (PPG-CEMat), Federal University of Campina Grande, Av. Aprígio Veloso-882, Bodocongó, Campina Grande 58429-900, PB, Brazil.

Laboratory of Materials Technology (LTM), Department of Materials Engineering, Federal University of Campina Grande, Av. Aprígio Veloso-882, Bodocongó, Campina Grande 58429-900, PB, Brazil.

出版信息

Materials (Basel). 2022 Apr 7;15(8):2708. doi: 10.3390/ma15082708.

DOI:10.3390/ma15082708
PMID:35454400
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9028255/
Abstract

The effects of acid and organo-functionalizations on the surface of Brazilian palygorskite clay was investigated, evaluating its potential in the adsorptive capacity of the drug sodium diclofenac present in wastewaters. The modifications on the clay structure were investigated by X-ray diffraction, X-ray fluorescence, thermogravimetric, differential thermal analysis, Fourier transform infrared spectroscopy, surface area by N adsorption (77.5 K) and Zeta potential. The experimental design was carried out to find the best conditions for the adsorption tests, in which concentration, mass and pH were significant. In the kinetic study, the pseudo-second-order model better described the adsorption process for acid and organo-functionalized samples. Such results indicate that the adsorption behavior probably occurs due to the phenomenon of chemisorption. Regarding the adsorption isotherms, the Langmuir model was the one that best adjusted both the experimental data of acid and the organo-functionalized samples, whose maximum adsorption capacity were 179.88 and 253.34 mg/g, respectively. This model also indicates that the sodium diclofenac is adsorbed to monolayers homogeneously through chemisorption. In general, the studied clays proved to be suitable adsorbents for the removal of sodium diclofenac.

摘要

研究了酸处理和有机官能化对巴西坡缕石粘土表面的影响，评估了其对废水中双氯芬酸钠药物的吸附能力。通过X射线衍射、X射线荧光、热重分析、差示热分析、傅里叶变换红外光谱、N吸附比表面积（77.5K）和Zeta电位研究了粘土结构的变化。进行实验设计以找到吸附试验的最佳条件，其中浓度、质量和pH值具有显著性。在动力学研究中，准二级模型能更好地描述酸处理和有机官能化样品的吸附过程。这些结果表明，吸附行为可能是由于化学吸附现象引起的。关于吸附等温线，Langmuir模型最能拟合酸处理和有机官能化样品的实验数据，其最大吸附容量分别为每克179.88毫克和253.34毫克。该模型还表明，双氯芬酸钠通过化学吸附均匀地吸附到单分子层上。总体而言，所研究的粘土被证明是去除双氯芬酸钠的合适吸附剂。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4506/9028255/3721b994ce5d/materials-15-02708-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4506/9028255/e5d9a3c10d2b/materials-15-02708-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4506/9028255/c5ae73067175/materials-15-02708-g002a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4506/9028255/7ae1e901e887/materials-15-02708-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4506/9028255/a30ab9c5a43b/materials-15-02708-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4506/9028255/0b9e9b1b0512/materials-15-02708-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4506/9028255/3721b994ce5d/materials-15-02708-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4506/9028255/e5d9a3c10d2b/materials-15-02708-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4506/9028255/c5ae73067175/materials-15-02708-g002a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4506/9028255/7ae1e901e887/materials-15-02708-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4506/9028255/a30ab9c5a43b/materials-15-02708-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4506/9028255/0b9e9b1b0512/materials-15-02708-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4506/9028255/3721b994ce5d/materials-15-02708-g009.jpg

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