Open AccessRemoval of Pyrene from Aqueous Solution Using Fe-based Metal-organic Frameworks
Author(s) -
Zakariyya Uba Zango,
ni Soraya Sambudi,
Khairulazhar Jumbri,
Noor Hana Hanif Abu Bakar,
Bahruddin Saad
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/549/1/012061
Subject(s) - aqueous solution , adsorption , langmuir adsorption model , metal organic framework , fourier transform infrared spectroscopy , pyrene , scanning electron microscope , materials science , bet theory , nuclear chemistry , specific surface area , chemical engineering , chemistry , inorganic chemistry , organic chemistry , catalysis , composite material , engineering
Metal-organic frameworks (MOFs), MIL-88(Fe) and NH2-MIL-88(Fe) were synthesized using microwave-assisted solvothermal technique. BET analysis has shown the porous nature of the MOFs, possessing surface areas with corresponding pore volumes of 1240 m2g −1 and 0.7 m 3 g −1 , 941 m 2 g −1 and 0.6 m 3 g −1 for MIL-88(Fe) and NH2-MIL-88(Fe), respectively. Other characterizations were also conducted using scanning electron microscopy (SEM), powdered X-ray diffraction (XRD) and Fourier transformed infrared (FTIR) spectroscopy. The MOFs were evaluated for application as adsorbents for the removal of pyrene (PYR) in aqueous solution. The removal efficiency achieved by MIL-88(Fe) was 99.7% while for NH2-MIL-88(Fe) was 96.0% within 40 minutes. Both MOFs has shown good removal of the PYR even after 5 consecutive uses. The adsorption isotherm was studied and favoured more by the Langmuir model, while the kinetics was found to follow pseudo-second-order model. The process was thermodynamically exothermic and spontaneous. Thus, the MOFs studied exhibited favourable features as potential adsorbents for the removal of PYR in wastewater.