Assessment of the stability of amino acid complexes of heavy metals to biodegradation in the aquatic environment

Abstract

Abstract Sodium salts of amino acids in solution have an alkaline reaction, which makes it possible to effectively bind metals into complex compounds, since in an alkaline medium, under the action of hydroxyl ions, the dissociation of amine groups is suppressed, and carboxyl groups remain dissociated, charging negatively, and behave like an anion. In our experiments, we used an amino acid-based reagent. When processing various environments (objects) contaminated with heavy metals (HM) with this reagent, HM amino acid complexes are formed. In our experiments, we used an amino acid-based reagent. With processing various environments (objects) contaminated with heavy metals (HM) with this reagent are formed HM amino acid complexes. Model experiments to assess the effect of microorganisms under aerobic conditions on the stability of amino acid complexes of heavy metals. After biodegradation of solutions with TM complexes, no more than 2-3% of heavy metals pass through the filter, which is ten times less than from untreated with the reagent solution.