Publikacje

Abstract:

The removal of pentachlorophenol (PCP) from aqueous solution using low-cost biosorbents including
sunflower seed hulls, hazelnut shells, pine sawdust and milk thistle seeds was investigated. The
effect of experimental parameters such as contact time, initial biosorbent dose, solution pH and ionic
strength was evaluated. The adsorption kinetics was investigated according to the pseudo-first order,
pseudo-second order and intra-particle diffusion kinetic models. The pseudo-second order model
best described the adsorption process. The equilibrium adsorption data were analyzed by Langmuir,
Freundlich and Sips isotherm models using non-linear regression method. The best results were
achieved with the Freundlich model. The values of the Freundlich adsorption parameter (KF) were
0.127, 0.168, 0.214 and 0.296 (mg/g)(L/mg)1/n for the sunflower seed hulls, milk thistle seeds, hazelnut
shells and pine sawdust, respectively. The results showed that the agricultural and industrial wastes
may be used as effective adsorbents without any treatment or any other modification for removal of
PCP from the aqueous medium.

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Adsorptive removal of pentachlorophenol from water using agricultural and industrial wastes