Open AccessComparative study of adsorptive removal of oxyanion (Cr2O4 -2) from aqueous media over unmodified and magnetically modified Melia azedarach
Author(s) -
Mirza Nosheen,
Aamir Amanat Ali Khan,
Muhammad Salman,
Syed Salman Shafqat,
Muhammad Sajid,
Muhammad Rizwan,
Madeeha Aslam,
Farhat Ijaz
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1101/1/012031
Subject(s) - melia azedarach , chemistry , aqueous solution , adsorption , langmuir , fourier transform infrared spectroscopy , biosorption , freundlich equation , langmuir adsorption model , nuclear chemistry , oxyanion , scanning electron microscope , analytical chemistry (journal) , materials science , chromatography , chemical engineering , organic chemistry , sorption , horticulture , engineering , biology , catalysis , composite material
In the present study, unmodified Melia azedarach (UMA) and magnetically modified Melia azedarach (MMA) were used as a low cost biosorbent for the adsorptive removal of oxyanion (chromate ion Cr 2 O 4 2- ) from aqueous solution. The UMA and MMA were characterized by Fourier Transform Infrared Spectroscopy (FTIR) and Scanning electron microscopy (SEM). Batch biosorption process was used to check the effect of well-known process parameters including biosorbent dose, contact time and pH of solution. Experimental results revealed that MMA has more adsorption capacity as compared to UMA. Maximum % age removal (60.49%) was observed under acidic condition (pH=2) using MMA. The obtained experimental data was evaluated using Langmuir and Freundlich isotherms as well as pseudo 1 st and 2nd order reaction kinetic models. Results showed that equilibrium mechanism can satisfactorily be explained by Langmuir model as depicted by the correlation factor (close to unity) and follows 2 nd order reaction kinetic models.