The kinetics of sorption of divalent metal ions onto sphagnum moss flat

A pseudo-second order rate equation describing the kinetics of sorption of divalent metal ions onto sphagnum moss peat at different initial metal ion concentrations and pear doses has been developed. The kinetics of sorption were followed based on the amounts of metal sorbed at various time interval s. Results show that sorption (chemical bonding) might be rate-limiting in the sorption of divalent metal ions onto peat during agitated batch contact time experiments. The rate constant, the equilibrium sorption capacity and the initial sorption rate were calculated. From these parameters, an empir ical model for predicting the sorption capacity of metal ions sorbed was de rived. (C) 2000 Elsevier Science Ltd. All rights reserved.