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Mode of coordination of the drug Sulfanilamide has been meticulously studied in its transition metal complexes with Fe(III), Ni(II) and Cu(II). The present study deals with green synthesis of these metallodrug compounds by microwave irradiation. Elemental, spectral and thermal analysis methods have been carried out for the elucidation of structure of complexes and the coordination behaviour of ligating drug with the metal ions. Sulfanilamide is found to exhibit a bidentate behaviour in Fe(III) and Cu(II) complexes, whereas it shows monodentate coordination with Ni(II). Thermogravimetric data (TGA and DTA) have been utilised to evaluate the kinetic and thermodynamic parameters using Coats and Redfern integral equations. Investigation of antibacterial properties of the complexes has been done against E. coli, S. aureus and B. subtilis.

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Wide ranges of low cost adsorbents were used to remove hazardous metal in aqueous solution and wastewater. The low cost adsorbents were usually collected from agricultural waste, seafood waste, food waste, industrial by-product and soil. These adsorbents are readily available in a copious amount. Some of the natural adsorbents appeared as good heavy metal removal, while some were not and require further modifications and improvements to enhance the adsorption capacity. Currently, heavy metals exist in most of the industrial wastewaters and water supplies are among the most severe environmental contaminants. Numerous research works have been conducted in this field, this review includes few potential solution containing papers.

The Tm(III) doped systems with various ligands studied with respect to hypersensitive transition. The spectroscopic data for hypersensitive transition have been correlated with the thermodynamic parameters. The thermodynamic parameters include thermodynamic efficiency and partition function of the transition.