Obtaining adsorbents from acid and acid-thermal activation of bentonite for chlorothalonil pesticide removal

被引：0
作者：
Boudouara, Nadia [1 ]
Marouf, Reda [1 ]
Schott, Jacques [2 ]
机构：
[1] Univ Mustapha Stambouli Mascara, Lab Mat Applicat & Environm, PB 305 Mamounia Rd, Mascara 29000, Algeria
[2] Univ Paul Sabatier, Lab Geosci Environm Toulouse, CNRS, UMR 5563,OMP, Toulouse, France
来源：
WATER PRACTICE AND TECHNOLOGY | 2020年 / 15卷 / 03期
关键词：
acid attack; adsorption; bentonite; chlorothalonil; themal activation; AQUEOUS-SOLUTION; WASTE-WATER; SURFACE MODIFICATION; METHYLENE-BLUE; CONGO-RED; ADSORPTION; SORPTION; CARBON; COPPER; DYE;
D O I：
10.2166/wpt.2020.065
中图分类号：
TV21 [水资源调查与水利规划];
学科分类号：
081501 ;
摘要：
Bentonite samples collected from M'Zila of Mostaganem (Algeria) were treated in first protocol with sulfuric acid at concentrations 1, 3 and 6N. The second protocol concerns the acid attack of bentonite combined with thermal treatment at temperatures of 100 and 200 degrees C. The obtained adsorbents were characterized by different analyses techniques such as chemical composition, X-ray diffraction (XRD), specific surface area and pH(PZC). The modified bentonites were used for removal of Chlorothalonil (Chl) from aqueous solution. The adsorption behavior of the pesticide was studied under different experimental conditions of pH, contact time, concentration of Chl and temperature of solution. The adsorption of Chl followed pseudo-second order kinetics and was described by the Freundlich equation. Thermodynamic study revealed that Chl adsorption was endothermic and physical in nature.
引用
收藏
页码：812 / 825
页数：14
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