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聚天冬氨酸-离子烯/钠基蒙脱石纳米复合材料作为阴离子染料的新型吸附剂;离子烯结构的影响。

Polyaspartate-Ionene/Na-Montmorillonite Nanocomposites as Novel Adsorbent for Anionic Dye; Effect of Ionene Structure.

作者信息

El-Hamshary Hany, Elsherbiny Abeer S, El-Newehy Mohamed H, El-Hefnawy Mohamed E

机构信息

Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia.

Department of Chemistry, Faculty of Science, Tanta University, Tanta 31527, Egypt.

出版信息

Polymers (Basel). 2020 Nov 29;12(12):2843. doi: 10.3390/polym12122843.

DOI:10.3390/polym12122843
PMID:33260348
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7759794/
Abstract

Surface modification of sodium montmorillonite (Na-Mt) was performed using antimicrobial agents to produce an ecofriendly nanocomposite. The adsorption performance of the nanocomposite has been evaluated for the removal of Acid Blue 25 dye (AB25) as a model organic pollutant from wastewater. Sodium montmorillonite (Na-Mt) was modified with three different ionene compounds through ion exchange, and further modified through reaction with polyaspartate to provide three ecofriendly nanocomposites (denoted ICP-1-3). The nanocomposites were characterized using FTIR, PXRD, TEM, SEM, and BET surface area. The adsorption isotherm of AB25 onto ICP-1, ICP-2 and ICP-3 was analyzed using the Langmuir, Freundlich, and Dubinin-Radushkevich (D-R) models. The adsorption isotherm was found to be best fitted by a Freundlich model. The thermodynamic parameters were calculated. The kinetics of the adsorption data were analyzed and the adsorption behavior was found to obey pseudo-second-order kinetics, and the intraparticle diffusion model. The adsorption mechanism was studied by FTIR.

摘要

使用抗菌剂对钠基蒙脱石(Na-Mt)进行表面改性,以制备一种环保型纳米复合材料。已评估该纳米复合材料对作为模型有机污染物的酸性蓝25染料(AB25)的吸附性能,用于从废水中去除该染料。通过离子交换用三种不同的紫罗碱化合物对钠基蒙脱石(Na-Mt)进行改性,并通过与聚天冬氨酸反应进一步改性,以提供三种环保型纳米复合材料(分别表示为ICP-1-3)。使用傅里叶变换红外光谱(FTIR)、粉末X射线衍射(PXRD)、透射电子显微镜(TEM)、扫描电子显微镜(SEM)和比表面积分析仪(BET)对纳米复合材料进行表征。使用朗缪尔(Langmuir)、弗伦德里希(Freundlich)和杜宾宁-拉杜什凯维奇(D-R)模型分析AB25在ICP-1、ICP-2和ICP-3上的吸附等温线。发现吸附等温线最符合弗伦德里希模型。计算了热力学参数。分析了吸附数据的动力学,发现吸附行为符合准二级动力学和颗粒内扩散模型。通过傅里叶变换红外光谱(FTIR)研究了吸附机理。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b4f3/7759794/7f56f17d8971/polymers-12-02843-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b4f3/7759794/e36dceaa723b/polymers-12-02843-sch001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b4f3/7759794/20276ac917f2/polymers-12-02843-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b4f3/7759794/8296b411c1fe/polymers-12-02843-g002a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b4f3/7759794/8dcbad5adc22/polymers-12-02843-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b4f3/7759794/2e37f16dadc1/polymers-12-02843-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b4f3/7759794/85b388931d79/polymers-12-02843-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b4f3/7759794/5c1970a6fb45/polymers-12-02843-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b4f3/7759794/7f56f17d8971/polymers-12-02843-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b4f3/7759794/e36dceaa723b/polymers-12-02843-sch001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b4f3/7759794/20276ac917f2/polymers-12-02843-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b4f3/7759794/8296b411c1fe/polymers-12-02843-g002a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b4f3/7759794/8dcbad5adc22/polymers-12-02843-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b4f3/7759794/2e37f16dadc1/polymers-12-02843-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b4f3/7759794/85b388931d79/polymers-12-02843-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b4f3/7759794/5c1970a6fb45/polymers-12-02843-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b4f3/7759794/7f56f17d8971/polymers-12-02843-g007.jpg

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