Green synthesis and kinetic study of eco-friendly chelating agent by hydrothermal process for remediation of heavy metals

ABSTRACT Water management forms a critical issue in the world because water accessibility increments due to the lack of freshwater assets and contamination effects. Water contamination brought about by toxic elements is one of the most significant natural issues in the world. Heavy metals are poisonous to human and threatening for the surroundings. The goal of this study has been to examine the impacts of newly synthesised eco-friendly chelating agent on the removal of heavy metal ions from synthetic water. Here a new eco-friendly chelating agent based on the glycine and citric acid has been synthesised successfully in the high-pressure reactor without the use of any harmful chemicals, using only water as a solvent. Developed eco-friendly chelating agent, 2,2′-((2-(2-((carboxymethyl)amino)-2-oxoethyl)-2hydroxysuccinyl)bis(azanediyl)diacetic acid has been studied in the framework of green chemistry to address the issues of cleaner synthesis. In the perspective of green chemical synthesis and sustainable development, atom economy (AE), Environmental – Factor (E-Factor) and Process Mass Intensity has been estimated for the studied amide synthesis process. The effect of various parameters like pH of the solution, contact time, ratio of metal to chelate and temperature was examined for the removal of heavy metals like chromium, copper and zinc from synthetic water. GRAPHICAL ABSTRACT