In situ modification of MCM-41 using niobium and tantalum mixed oxide from columbite processing for methylene blue adsorption: Characterization, kinetic, isotherm, thermodynamic and mechanism study

被引：17
作者：
de Oliveira, Tiago Fernandes [1 ]
de Souza, Carlson Pereira [1 ]
Lopes-Moriyama, Andre Luis [1 ]
de Silva, Marta Ligia Pereira da [2 ]
机构：
[1] Fed Univ Rio Grande Norte UFRN, Dept Grad Chem Engn, BR-59078970 Natal, RN, Brazil
[2] Fed Rural Univ Semiarid Reg UFERSA, Dept Engn & Technol, BR-59600000 Mossoro, RN, Brazil
来源：
MATERIALS CHEMISTRY AND PHYSICS | 2023年 / 294卷
关键词：
MCM-41; Niobium; Tantalum; Methylene blue adsorption; Columbite; MESOPOROUS AL-MCM-41; ENHANCED ADSORPTION; AQUEOUS-SOLUTION; REMOVAL; SILICA; DYES; EQUILIBRIUM; COMPOSITE; OXIDATION; CATALYST;
D O I：
10.1016/j.matchemphys.2022.127011
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The present study offers an alternative use for columbite ore as metal source in the synthesis of Nb,Ta-modified MCM-41 and its applicability in the removal of methylene blue from aqueous solution. The structural and textural properties of the materials were obtained by XRD, SEM, TEM, BET, UV-vis and FT-IR analysis. The effects of pH, adsorbent dosage and initial dye concentration were evaluated by batch adsorption experiments. Adsorption kinetic and isotherm models showed a well fit with pseudo-second order and Freundlich model, respectively, indicating a chemisorption dominant process carried out in a heterogeneous surface. Furthermore, thermodynamic parameters indicated a spontaneous and feasible endothermic process. The MB adsorption ca-pacity of Nb,Ta-MCM-41(30) reached approximately 207.07 mg g-1 in basic medium using 1.0 g L-1 of adsorbent. Therefore, it was found that this material is promising in wastewater treatment.
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页数：13
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