NMR characterization and kinetic performance of polysiloxane immobilized thiosalicylic ligand system on Cr (III) ion from tannery wastewater

Tannery wastewater hurts the ecosystem with the chemical components used to convert this raw hides and skins into a stable collagen matrix with attendant limitations of various treatment methods was employed.This necessitated the synthesis of Polysiloxane Immobilized Thiosalicylic Ligand System (PITSLS), was characterised and employed for the adsorption of Cr (III) Ion from Tannery Wastewater.The product was characterized using a Nuclear Magnetic Resonance Spectrometer (NMR). 1 H-NMR spectrum showed chemical shifts (ppm) at 2.2 assigned to (2H, S); 13 C signals at 169.093 assigned to (C=N, C=O) and 124.948 to 139.008 assigned to aromatic carbon respectively for PITSLS which was soluble in deuterated dimethyl sulfoxide.The adsorption percentage of Cr 3+ in tannery wastewater using PITSLS (20 mg), was 97.443 % and 30 mg gave 98.430 % at pH 6.00 respectively.For contact time the results showed a significant adsorption in the first minute of contact time and consequently reduced with an increase in time to 120 min respectively due to the unavailability of reactive sites for adsorption.PITSLS has proven to be a promising adsorbent in the adsorption/detoxification of Cr (III) ions in tannery wastewater.