Synthesis of Magnesium Ferrites for the Adsorption of Congo Red from Aqueous Solution Using Batch Studies

2nd International Conference on Mathematics, Science, Education and Technology

数学;自然科学;教育

Erdawati, E.^1 ; Darsef, D.^1

Department of Chemistry, Universitas Negeri Jakarta, Jalan Rawamangun, Jakarta, Indonesia^1

关键词: Adsorption capacities;    Adsorption efficiency;    Adsorption kinetics;    Calcination temperature;    Increasing solutions;    Langmuir adsorption equilibrium;    Langmuir isotherm models;    Pseudo-second order model;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/335/1/012024/pdf
DOI  :  10.1088/1757-899X/335/1/012024

来源: IOP

【 摘 要 】

A sol gel method with citric acid as an anionic surfactant was used to fabricate nano magnesium ferrites (MgFe2O4) under different calcination temperatures for 2h, respectively. The microstructure and surface morphology of magnesium ferrite powder were characterized by FTIR, XRD, SEM, and BET. The results of this study are useful for adsorption Congo red. The results showed that increasing solution pH and extending contact time are favorable for improving adsorption efficiency. with initial Congo red concentration of 50 mg/L and 100 mg/L. Adsorption data fits well with the Langmuir isotherm models with a maximum adsorption capacity (qm) and a Langmuir adsorption equilibrium constant (K) of 65.1 mg/g and 0.090 L/mg, respectively. The adsorption kinetic agrees well with pseudo second order model with the pseudo second rate constants (K2) of 0.0468 and0.00189 g/mg/min for solutions with initial congo red of 50 and 100 mg/L, respectively.