Open AccessPreparation of amino-functionalized mesoporous silica (MCM-41) for Nitrate anion adsorption from aqueous solution
Author(s) -
Anaam A. Sabri,
Noor S. Abbood
Publication year - 2019
Publication title -
mağallaẗ ittiḥād al-ğāmiʿāt al-ʿarabiyyaẗ li-l-dirāsāt wa-al-buḥūṯ al-handasiyyaẗ
Language(s) - English
Resource type - Journals
eISSN - 2616-9401
pISSN - 1726-4081
DOI - 10.33261/jaaru.2019.26.2.005
Subject(s) - adsorption , thermogravimetric analysis , freundlich equation , fourier transform infrared spectroscopy , aqueous solution , mcm 41 , mesoporous material , chemistry , mesoporous silica , nuclear chemistry , inorganic chemistry , nitrate , activated carbon , materials science , chemical engineering , organic chemistry , molecular sieve , catalysis , engineering
In this study, mesoporous silica MCM-41 material was synthesized using simple method at room temperature, and then loaded it with amine group by grafting method. MCM-41 was characterized by means of atomic force microscopy (AFM), X-ray diffraction (XRD), BET surface area; Thermal Gravimetric Analysis (TGA) and Fourier transform infrared (FTIR) spectroscopy. Then the ability of MCM-41 as adsorbents to treat NO3 anion as inorganic pollutant from synthetic wastewater was investigated. Batch adsorption was employed to determine the effects of initial concentration (25-150 mg/L), pH (2-11), temperature (297,313,333 K), adsorbent dose (0.1-2g), and contact time (0–140 min). The results indicated that the kinetic data for nitrate anion adsorption with MCM-41 was fitted well with the pseudo-second-order kinetic model (R2=1). It was found that the Freundlich adsorption isotherm model for nitrate anion had the best fit with the experimental data. Various adsorbents (activated carbon, SBA-15, MCM-48) have been utilized to investigate their ability to remove nitrate anion and the results show that MCM-48 could be used to remove NO3 better than other adsorbents.