Facile Synthesis of MIL-53(Fe) by Microwave Irradiation and its Application for Robust Removal of Heavy Metals from Aqueous Solution by Experimental Design Approach: Kinetic and Equilibrium

被引:0
|
作者
Ghanbarian, Maryam [1 ,2 ]
Zeinali, Sedigheh [3 ,4 ]
Mostafavi, Ali [1 ]
Shamspour, Tayebe [1 ]
机构
[1] Shahid Bahonar Univ, Fac Sci, Dept Chem, Kerman, Iran
[2] Shahid Bahonar Univ, Young Researchers Soc, Kerman, Iran
[3] Shiraz Univ, Sch Adv Technol, Dept Nanochem Engn, Shiraz, Iran
[4] Shiraz Univ, Nanotechnol Res Inst, Shiraz, Iran
来源
ANALYTICAL AND BIOANALYTICAL CHEMISTRY RESEARCH | 2020年 / 7卷 / 02期
关键词
MIL-53(Fe); Microwave radiation; Nano-sized crystals; Response surface methodology (RSM); Heavy metals; Removal; ZERO-VALENT IRON; ORGANIC FRAMEWORK; SELECTIVE REMOVAL; LEAD IONS; POROUS SOLIDS; ADSORPTION; PB(II); WATER; PB; ZN(II);
D O I
暂无
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
MIL-53(Fe) with a huge porosity has been synthesized by microwave radiation in different conditions: various powers (80, 100 W) and time (5, 10 min). Nano-sized crystals were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and specific surface area analysis. After characterization, MIL-53(Fe)-1 with the best porous structure for Pb(II) and Cd(II) removal was used for all tests from aqueous solution. The best condition for the synthesis was 5 min and 80 W. Then, the best porous structure was selected for removal of Pb(II)/Cd(II) from aqueous solution. The response surface methodology (RSM) based on central composite design (CCD) was applied to optimize the removal capacity. In these experimental designs, four independent variables were studied and the best condition was evaluated as pH (in the range of 6-8), temperature (40-50 degrees C), contact time (50 min), and adsorbent amount (0.1-0.3 g l(-1)). The removal efficiency and capacity of MIL-53(Fe) for Pb(II) and Cd(II) were further surveyed. Langmuir equation was the best isotherm to describe the adsorption manner of Pb(II) and Cd(II) ions (q(max) values (178.57 and 714.28 mg g(-1)) for Pb(II) and Cd(II)). The adsorption process was confirmed by a pseudo-second-order kinetic pattern. The result of thermodynamic studies displayed that the sorption process was spontaneous and exothermal.
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页码:263 / 280
页数:18
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