Use of Brushite as Adsorbent for the Removal of Anionic and Cationic Dyes Present in Aqueous Solutions

被引:0
|
作者
Talavera-Lopez, Alfonso [1 ]
Mendes-Salas, Antonio [2 ]
Salazar-Hernandez, Mercedes [3 ]
Ardila, A. Alba N. [4 ]
Hernandez-Soto, Rosa [2 ]
Solis-Marcial, Oscar Joaquin [5 ]
Hernandez, Jose A. [2 ]
机构
[1] Univ Zacatecas, Unidad Ciencias Quim, Campus UAZ Siglo 21,Carretera Guadalajara Km 6, Zacatecas 98160, Mexico
[2] UPIIG, Inst Politecn Nacl, Av Mineral Valencia 200,Col Fracc Ind Puerto Inter, Guanajuato 36275, Mexico
[3] Univ Guanajuato, Dept Ingn Minas Met & Geol, Div Ingn, Guanajuato 36020, Mexico
[4] Politecn Colombiano Jaime Isaza Cadavid, Carrera 48 7-151, Medellin 051052, Colombia
[5] Inst Politecn Nacl, Unidad Profes Interdisciplinaria Ingn Campus Zacat, Calle Circuito Gato 202, Zacatecas 98160, Mexico
关键词
adsorption; dyes; adsorbent; mechanism and removal; GENTIAN-VIOLET; CRYSTAL VIOLET; BASIC-DYES; ADSORPTION; EQUILIBRIUM;
D O I
10.3390/w16192810
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Currently, water pollution caused by dyes is a serious problem since they are toxic and carcinogenic to living beings. To reduce the presence of these contaminants, natural adsorbents have been considered as they are easy to obtain, inexpensive, and have high removal efficiency. In this work, the adsorption process using natural brushite (nDCPD) was studied for the removal of phenol red (PR), achieving a removal rate of 99.15% and an adsorption capacity of 82.24 mg/g, and gentian violet (GV), achieving a removal rate of 97.03% and an adsorption capacity of 74.22 mg/g. Equilibrium adsorption occurs for both dyes in multiple layers on the surface. The adsorption process is spontaneous for both dyes. The kinetics of the adsorption process involve using a single active site on the surface for PR adsorption, while for GV, two active sites on the surface are required. Analysis via FTIR, EDS, and XRD revealed various mechanisms that intervene in the adsorption process of both dyes on the surface of nDCPD, such as electrostatic forces, functional groups, physisorption, and ion exchange.
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页数:19
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