Abstract
Modified peanut shell (MPS) was prepared from peanut hull by chemical activation with H3PO4 and carbonized, which was characterized by micrometrics ASAP-20, SEM, and EDS. Adsorption of Cu and CN− on MPS was investigated as a function of pH, adsorbent dosage, temperature and time. The Langmuir and Freundlich models were used to simulate the adsorption isotherms of Cu at different temperature. The thermodynamic date were calculated, the results suggest that adsorption process of Cu on MPS was spontaneous and endothermic. Pseudo second-order kinetic model fits the experimental curves of Cu well and adsorption curve of CN− fits the pseudo first-order kinetic model.
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