Heavy Metals Removal by Adsorption Using Aloe barbadensis Miller Leaves Residue Powder for More Sustainable Environment

Abstract

Aloe barbadensis Miller residue from herbal wastes has often proved to be effective in the removal of heavy metals from industrial wastewaters. This study was focused on the adsorption of lead using A.barbadensis Miller residue. The initial concentration of lead ions was varied and the influence of contact time, adsorbent dosage, pH and initial metal concentration on adsorption process were studied. The temperature and agitation speed were kept constant at 30 °C and 150 rpm, respectively. The maximum lead removal percentage was observed to be 98.3% at an adsorbent dosage of 0.6 g per 100 ml of solution, pH 6, initial lead concentration of 20 mg/l and contact time of 75 min. Thermodynamic studies show that adsorption process is spontaneous and feasible by negative value of Gibbs free energy; enthalpy was indicated by exothermic process.

Keywords: Adsorption, lead, Aloe barbadensis Miller leaves powder, Gibbs free energy, waste water

Cite this Article

Shweta Gupta, Joyti Singh, Arinjay Kumar Jain. Heavy Metals Removal by Adsorption Using Aloe barbadensis Miller Leaves Residue Powder for More Sustainable Environment. Research & Reviews: A Journal of Microbiology and Virology. 2019; 9(1):
92–98p.