Title of article :
Removal of heavy metals ( Cu2+ and Cd2+) from effluent using gamma irradiation, titanium dioxide nanoparticles and methanol
Author/Authors :
Asgari Lajayer, Behnam Department of Soil Science - Faculty of Agriculture - University of Tabriz, Tabriz , Najafi, Nosratollah Department of Soil Science - Faculty of Agriculture - University of Tabriz, Tabriz , Moghiseh, Ebrahim School - Nuclear Science and Technology Research Institute, Karaj , Mosaferi, Mohammad Tabriz University of Medical Sciences, Tabriz , Hadian, Javad Shahid Beheshti University, Tehran
Abstract :
Heavy metal pollution has become one of the most serious environmental problems. The aim of this study was to achieve
an efficient treatment process of effluents containing 1 mM copper (
Cu2+) and cadmium (
Cd2+) ions using a combination
of gamma irradiation, methanol and TiO2
nanoparticles under different pH values. The results showed that in acidic conditions,
removal of Cu2+
and Cd2+
ions by physical adsorption was less than 15% and adsorption of Cd2+
was more than that
of Cu2+.
In the same condition, the Cu2+
removal percentage by irradiation was greater than that of Cd2+.
In basic solutions,
due to precipitation of Cd and Cu hydroxides, it was not possible to carry out adsorption experiments on Cd2+
and Cu2+
ions
removal by TiO2
and gamma irradiation. Cu2+
and Cd2+
ions removal processes under different conditions could be depicted
by the first order kinetics model. The combined application of TiO2
and methanol enhanced Cu2+
and Cd2+
ions removal
at all pH levels examined. However, using the combination of TiO2
and methanol at acidic solutions facilitated completely
removal of Cu2+
and Cd2+
ions. So that, only using 50 kGy irradiation dose with combination of TiO2
nanoparticles and
methanol led to the removal of 99% of coexisting Cu2+
and Cd2+
ions from the acidic wastewater.
Keywords :
Gamma irradiation , Heavy metals , Methanol , Nanoparticles , Radiocatalysis , Wastewater
Journal title :
Astroparticle Physics
