Adsorption of ammonium from water solution onto natural and modified palygorskite

被引：0
|
作者：
Marmolejo-Contreras, Juan de la Cruz [1 ]
Leyva-Ramos, Roberto [1 ]
Carrales-Alvarado, Damarys Haidee [1 ]
Valdez-Garcia, Genesis Derith [1 ]
Naranjo-Zapot, Brenda Vianey [1 ]
机构：
[1] Univ Autonoma San Luis Potosi, Fac Ciencias Quim, Ctr Invest & Estudios Posgrad, Ave Dr M Nava 6, San Luis Potosi 78210, Mexico
来源：
MRS ADVANCES | 2024年
关键词：
SURFACE-PROPERTIES; EXCHANGE; CLINOPTILOLITE; CLAY;
D O I：
10.1557/s43580-024-01027-4
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This work aims to study ammonium removal in an aqueous solution by adsorption on natural and modified Palygorskite clay to improve water quality. The palygorskite (Pal) is a fibrous natural clay and was modified by acid treatment using 4 N and 6 N HCl solutions to enhance its adsorption capacity toward ammonium. The Pal modified were designated as Pal-Ac4 and Pal-Ac6. The ammonium adsorption isotherms on Pal, Pal-Ac4, and Pal-Ac6 were evaluated, and the effects of modification, pH, and temperature on the adsorption capacity were analyzed. At an equilibrium concentration of 300 mg/L and T = 25 degrees C, the adsorption capacity of Pal, Pal-Ac4, and Pal-Ac6 was 2.8, 9.2, and 5.3 mg/g, respectively, and the optimal acid treatment was that for Pal-Ac4. The adsorption capacity of Pal-Ac4 increased, reducing the solution pH from 7 to 3, and the maximum adsorption capacity of Pal-Ac4 was 28.5 mg/g at pH 3.
引用
收藏
页码：301 / 307
页数：7
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