Facile synthesis and characterization of a novel 1,2,4,5-benzene tetracarboxylic acid doped polyaniline@zinc phosphate nanocomposite for highly efficient removal of hazardous hexavalent chromium ions from water
Facile synthesis and characterization of a novel 1,2,4,5-benzene tetracarboxylic acid doped polyaniline@zinc phosphate nanocomposite for highly efficient removal of hazardous hexavalent chromium ions from water
复制标题
DOI：
10.1016/j.jcis.2020.10.036
复制
发表时间：
2021-03-01
影响因子：
9.9
通讯作者：
Albourine, Abdallah
中科院分区：
文献类型：
--
作者：
Hsini, Abdelghani;Naciri, Yassine;Albourine, Abdallah
采用两步法制备了一种新型的1，2，4，5-苯四元酸掺杂的聚苯胺磷酸锌纳米复合材料(BTCA-PANI@ZnP)。在此基础上，考察了制备的复合材料在间歇吸附条件下对六价铬离子的吸附性能。动力学方法研究表明，吸附过程符合准二级模型和朗缪尔模型。热力学研究表明，这是一个自发的吸热过程。测得较高的单层吸附量为933.88 mg g(-1)。此外，对BTCA-PANI@ZnP纳米复合材料吸附铬(VI)离子的性能研究表明，该方法适合大规模应用。X-射线光电子能谱(XPS)分析证实，Cr(VI)吸附在BTCA-PANI@ZnP表面，随后被还原为Cr(III)。因此，外界传质、静电吸引和还原现象的发生是铬(VI)离子去除的主要机理途径。材料优异的吸附性能、表面的多维特性以及多种去除机理的参与，清楚地表明了BTCA-PANI@ZnP材料作为一种有效的替代材料去除废水中铬(VI)的潜力。(C)2020 Elsevier Inc.保留所有权利。
The present study describes the preparation of a novel 1,2,4,5-benzene tetracarboxylic acid doped polyaniline@zinc phosphate (BTCA-PANI@ZnP) nanocomposite via a facile two-step procedure. Thereafter, the as-prepared composite material adsorption characteristics for Cr(VI) ions removal were evaluated under batch adsorption. Kinetic approach studies for Cr(VI) removal, clearly demonstrated that the results of the adsorption process followed the pseudo second order and Langmuir models. The thermodynamic study indicated a spontaneous and endothermic process. Furthermore, higher monolayer adsorption was determined to be 933.88 mg g(-1). In addition, the capability study regarding Cr(VI) ions adsorption over BTCA-PANI@ZnP nanocomposite clearly revealed that our method is suitable for large scale application. X-ray photoelectron spectroscopy (XPS) analysis confirmed Cr(VI) adsorption on the BTCA-PANI@ZnP surface, followed by its subsequent reduction to Cr(III). Thus, the occurrence of external mass transfer, electrostatic attraction and reduction phenomenon were considered as main mechanistic pathways of Cr(VI) ions removal. The superior adsorption performance of the material, the multidimensional characteristics of the surface and the involvement of multiple removal mechanisms clearly demonstrated the potential applicability of the BTCA-PANI@ZnP material as an effective alternative for the removal of Cr(VI) ions from wastewater. (C) 2020 Elsevier Inc. All rights reserved.