Removal of crystal violet from aqueous solution using iron based metal organic framework

被引:73
|
作者
Soni, Sanju [1 ]
Bajpai, Parmendra Kumar [2 ]
Bharti, Dipti [3 ]
Mittal, Jyoti [4 ]
Arora, Charu [1 ]
机构
[1] Guru Ghasidas Univ, Dept Chem, Bilaspur 495009, India
[2] Guru Ghasidas Univ, Dept Pure & Appl Phys, Bilaspur 495009, India
[3] Greater Noida Inst Technol, Dept Chem, Greater Noida, UP, India
[4] Maulana Azad Natl Inst Technol, Dept Chem, Bhopal, India
关键词
MOF; Crystal violet; Adsorption; Kinetics; Thermodynamics; EFFICIENT REMOVAL; MALACHITE GREEN; RHODAMINE-B; PHOTOCATALYTIC DEGRADATION; METHYLENE-BLUE; DYE REMOVAL; ADSORPTION; EQUILIBRIUM; NANOPARTICLES; KINETICS;
D O I
10.5004/dwt.2020.26387
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Iron-benzene dicarboxylic acid (BDC) metal-organic framework (MOF) has been synthesized by solvothermal method at room temperature and tested for the adsorptive removal of the organic dye crystal violet from aqueous solution. Dye removal efficiency and adsorption characteristics were determined to investigate factors such as the effect of dye concentration, contact time, temperature, dose, and pH. Maximum dye removal efficiency was recorded to be 100% with an initial dye concentration of 5 mg/L. Langmuir, Freundlich, and Temkin adsorption isotherm models were used to investigate the adsorption process. The adsorption isotherm of crystal violet onto Fe-BDC-MOF can be described by Freundlich isotherm model and Langmuir isotherm model. Pseudo-second-order kinetic model with rate constant 1.22 x 10(-2) g/mg.min is found to be the best fit for the adsorption. Thermodynamic parameters viz. free energy; enthalpy, and entropy have been calculated with the help of adsorption isotherm data. The values of enthalpy and entropy have been obtained as 0.0947 kJ/mot and 0.325 kJ/mol/K, respectively, indicating an endothermic process with an increase in randomness at the solid-solution interface during adsorption. Negative value of Delta G illustrates the process to be spontaneous. Column adsorption capacity of Fe-BDC-MOF has been recorded 26.65 mg/g.
引用
收藏
页码:386 / 399
页数:14
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