Modelling And Simulation Of Cationic Dye Adsorption Using Modified Metal-Organic Framework-5 (MOF-5)
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Date
2021-07-01
Authors
Wan Mazlan, Wan Hamizan
Journal Title
Journal ISSN
Volume Title
Publisher
Universiti Sains Malaysia
Abstract
Modelling and simulation of cationic dye adsorption by using modified Metal-Organic
Framework-5 was studied. Mathematical model was developed based on a two-resistance model which included external mass transfer coefficient and pore diffusion
coefficient that controls the mass transfer process in batch adsorption. MATLAB
R2020b software was used to estimate the mass transfer parameters which are mass
transfer coefficient (kf) and pore diffusion coefficient (Dp) by matching the simulation
data with the experimental data from literature. The value of kf and Dp were estimated
to be 66.8 m/s and 2.1514×10-7 m2
/s respectively. By using the estimated parameters,
simulation results showed that the model provided good correlation with the
experimental data based on different initial concentrations. The estimated parameters
were used to study the adsorption of Methylene Blue (MB) by using modified MOF-5
under different factors such as modification of MOF-5, initial dye concentration,
temperature and the mass of adsorbent. It was concluded that the dye removal
efficiency was higher for modified MOF-5 (H6P2W18O62/MOF-5). Not only that, the
lower initial dye concentration, higher temperature and higher adsorbent mass also
result in higher dye removal efficiency.