Phytoremediation using lima beans (phaseolus lunatus) to remove cyanide content in mine tailings

Abstract

Mining industries face a challenge of high levels of cyanide in mine tailings. Cyanide is a strong binder for complexating with virtually heavy metal. This complexation with heavy metal can inhibit all biochemical processes resulting in human organ failure and even death. Research has it that remediation has always been chemical methods for example addition of oxidants and complexing agents such as ferrous sulphate which in the long run cause secondary pollution. Phytoremediation utilizes the equations of data analysis to measure the cyanide concentration in soil. It also uses the Friedman statistic to determine if there are statistically significant differences in cyanide concentrations across the stages of growth of the lima beans. This project rendered significant advantages such as significant potential of lima bean in improving soil health, nitrogen-fixing capability, the enhancement of the biological, chemical, and physical properties of the soil, organic matter, and soil structure, and in reducing soil bulk density, increasing soil water holding capacity, and promoting soil microbial diversity and activity, leading to enhanced soil ecosystem stability, thus enhancing soil quality. By demonstrating the feasibility and effectiveness of this method, the project aims to contribute a safer, more sustainable mining environment.