The use of response surface methodology for modelling of lead (II) removal from industrial waste by pumice and vermiculite

The main goal of the present work was to search the feasibility of pumice and vermiculite as adsorbents for lead (II) removal from industrial waste by using Box-Behnken method. Batch adsorption method was performed to evaluate the feasibility. Box-Behnken surface statistical design approach with three inlet parameters namely pH (2, 5, 8), adsorbent concentration (10, 50, 100 mg L-1), and contact time (5, 30, 120 mm) was conformed optimising experimental conditions of lead (II) adsorption process. Experiments were carried out regression analysis demonstrated good proper of the experimental data to the linear model with coefficient of determination (R-2) values of 91.49% and 98.51% for vermiculite and pumice, respectively. Optimisation of pH (2-2), adsorbent concentration (57 81 mg L-1-75.00 mg L-1), and contact time (89.06 mm, -78.50 mm) gave a maximum of approximate to 99.99% lead (II) removal for vermiculite and pumice, respectively.