Ecology, Environment and Conservation Paper

ADSORPTIVE REMOVAL OF ZN (II) IONS FROM WASTEWATER USING THE BIOSORBENT OF TECTONA GRANDIS LEAVES: EQUILIBRIUM AND THERMODYNAMIC STUDIES

Ankita Negi, Sushil Kumar Joshi and Narendra Singh Bhandari

Abstract

This study was conducted to explore the potential of Tectona grandis leaves as a biosorbent for removing the Zn (II) ions from wastewater solutions at the Department of Chemistry, S. S. Jeena Campus, Almora during April - September 2019-20. The batch experiments were employed by varying pH, contact time, biosorbent dose, metal ion concentration and temperature. Fourier transform infrared (FTIR) spectroscopic analysis showed that the hydroxyl (-OH), alkane (-CH2), amine (-NH2) etc. groups on the surface of Tectona grandis leaves biosorbent (TGLB) were responsible for the binding of Zn (II) ions. The Langmuir isotherm plot was demonstrated as the most relevant for biosorption data. The process was discovered as exothermic and spontaneous involving both physical and chemical bondings.