Adsorption efficacy of Carissa opaca roots residual biomass for the removal of copper from contaminated water

Waste material of different types coming from industries seriously affects the environment and contaminates water, soil, and air. The heavy metals effluents from industries constitute one of the most hazardous type of pollutants and the removal of these metals from the ecosystem is highly desirable to ensure the sustainability of environment. In the present study, residual biomass produced from roots of Carissa opaca upon extraction of bioactive compounds was used as a biosorbent to eliminate copper (Cu²⁺) ions from wastewater. The effect of different parameters such as contact time, pH, and initial concentration has been studied and maximum adsorption was observed for 10 ppm copper ions at contact time 120 minutes and pH 5. Adsorption isotherm studies reveal the good fitting of Langmuir adsorption isotherms than others and the adsorption efficiency of bio sorbent follows the pseudo-second order kinetic model. Conclusively Carissa opaca proved as a good biosorbent for the removal of copper ions from the contaminated water.