Removal of copper ions from industrial wastewater using waste from iron and magnesium production

Abstract

Research objective is to assess the possibility of removing copper ions from industrial wastewater using waste from iron and magnesium production. Methods of research. An experiment was conducted to remove copper ions from a solution of industrial wastewater using waste from iron and magnesium production. Data were obtained showing changes in the ion content of the studied metals in wastewater solutions. Theoretical research was carried out to analyze the effectiveness of existing wastewater treatment methods in order to study and generalize the results. The initial concentration of metal ions in solutions was measured with a Varian AA 240 FS atomic absorption spectrophotometer with a deuterium lamp for background correction and flame spraying. Temperature and pH were measured with a Hanna HI 99121 portable pH meter. Mineralization of solid samples was carried out with a MARS 5 Digestion Microwave System in Easy Prep vessels with the addition of nitric and hydrofluoric acids. Results. The results of the research on the removal of copper ions from industrial waste water using iron-magnesium production waste show that the samples under investigation were effective in absorbing copper from aqueous solutions. It was found that the amount of copper in the filtrates varies depending on the tested sorbent sample weight. There is an increase in the indicator of the degree of pollutant extraction from solutions from 52.02 to 99.04% for group 1 and from 43.2 to 98.91 % for group to respectively with an increase in the sample dosing rate from 0.2 to 0.5 g. The indicator of static volume capacity also depends on the mass of the sample added to the solution and decreases with the dosing rate growth. Wastes of iron-magnesium production contain magnesium and iron in high concentrations. After interaction with industrial waste water, they actively release magnesium into the solution, but continue to extract iron from it. The indicators of the degree of pollutant extraction from solutions and of static volume capacity for iron have high values regardless of the sample weight for both groups and vary from 99.85 to 99.98% and from 3.9 to 10.82 mg/g. Scope of results. The data obtained will used to develop effective materials and methods for water bodies pollution elimination.