Potential of using green adsorbent of heavy metal removal from aqueous solutions: Adsorption kinetics, isotherm, thermodynamic, mechanism and economic analysis

Abstract Peanut hull is a local natural abundant agricultural waste in Egypt. The peanut hull was used as an adsorbent without any chemical or physical treatment for copper ions Cu(II) removal from aqueous solutions. Effects of various parameters such as contact time, particle size and dosage of adsorbent, initial pH, solution temperature, and initial concentration of Cu(II) were investigated for a batch adsorption system.The optimum operating conditions were (1 h, 150 rpm shaking speed, 25 °C, pH = 4, 1 g peanut hulls of particle size