Modified bentonite for anionic dye removal from aqueous solutions. Adsorbent regeneration by the photo-Fenton process

被引：16
|
作者：
Khelifi, Selma [1 ]
Ayari, Fadhila [1 ]
机构：
[1] Univ Carthage, Fac Sci Bizerte, LACReSNE, Zarzouna 7021, Tunisia
来源：
COMPTES RENDUS CHIMIE | 2019年 / 22卷 / 2-3期
关键词：
Adsorption; Anionic dye; Photo-Fenton; Regeneration; Bentonite; CONGO RED-DYE; METHYLENE-BLUE; ADSORPTION; DEGRADATION; EQUILIBRIUM; OXIDATION; ORANGE; WATER; OXIDE;
D O I：
10.1016/j.crci.2018.12.001
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
This study aims to present an effective solution for pollutant treatment after adsorption onto modified bentonite. Modified bentonite has been taken as a medium to divide the treatment process of Congo red (CR) dye by a photo-Fenton process into two different processes (separation of CR from wastewater by adsorption and degradation of CR on the surface of the adsorbent by the photo-Fenton process). The adsorbent was characterized by scanning electronic microscopy, zeta potential, and diffuse reflectance spectroscopy techniques. Batch adsorption experiments were carried out to study the effect of the contact time on the adsorption properties of the dye. Kinetics study and isotherm analysis were conducted. The photo-Fenton regeneration of the adsorbent was investigated under different experimental conditions. The results show the success of the regeneration and the total mineralization of the dye. (C) 2018 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.
引用
收藏
页码：154 / 160
页数：7
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