Microwave functionalization of titanium oxide nanoparticles with chitosan nanolayer for instantaneous microwave sorption of Cu(II) and Cd(II) from water

The present study is aimed to evaluate the microwave-enforced sorption approach (MES) for instantaneous extraction and removal of trace concentration of metal ions using microwave-synthesized titanium oxide nanoparticles-bonded-chitosan nanolayer (NTiO2-NCh). The proposed and designed nanocomposite was characterized by different techniques. The coveted ions were allowed to heat in presence of NTiO2-NCh nanocomposite inside a microwave apparatus for 5-20 s to execute the sorption process. The contribution of microwave warming time, nanocomposite dose, concentration of Cd(II) and Cu(II) ions, pH and interfering ions were explored and optimized. Sorption of Cd(II) was characterized as 1050 and 1150 μmol g− 1 and those of Cu(II) were identified as 450 and 800 μmol g− 1 using 5 and 20 s of microwave heating time, respectively. Optimization of the nanocomposite dose factor was found to enhance the metal uptake values of Cd(II) to 1800 μmol g− 1 using 5.0 mg. The potential utilization of MES technique for removal and extraction of Cd(II) and Cu(II) at low concentration levels (mg L− 1) from water samples was also explored. The percentage extraction values of Cu(II) and Cd(II) from water and wastewater samples were ranged as 86.80-88.01% and 72.56-70.67%, respectively using 60-70 s heating via MES technique.