Removal of heavy metals from wastewater by using dimethylglyoxime ligand

Arash ALIZADEH YEGANI, Gülüzar ÖZBOLAT, Abdullah TULI

Abstract

Oximes constituted an important ligand group of coordination chemistry, have amphoteric property and compose of azomethine (>C=N-) and (-OH) groups. The complexes of transition metals with oxime ligands have been extensively studied in recent years. In this study we investigate the removal of Pb2+, Fe3+ and Zn2+ from wastewater using dimethylglyoxime (oxime) ligand. In these studies, dimethylglyoxime ligand formed complexes by reaction with high concentrations of iron, lead and zinc ions at physiological pH and room temperature. The obtained complexes are a water-soluble even in high concentration. The resulting complexes were analyzed by Fourier-transform infrared spectroscopy (FT-IR) and elemental analysis. The remaining metals were determined by Inductively Coupled Plasma-Mass Spectrometer (ICP-MS). According to ICP-MS results, concentrations of metals were dropped to 5 ppm for Pb, 4 ppm for Hg and 2.5 ppm for Fe from 50 ppm. The FT-IR spectrum showed that the peaks of ligand shifted and new peaks of metal-ligand formed after complexation. These results showed that Pb2+, Fe3+ and Zn2+ ions in certain concentration known in waste water and formed a complexes with dimethylglyoxime ligand.

Keywords

Wastewater, Dimethylglyoxime, Ligand, Oxime.

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References

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