Application of the thermoplastic starch pellets filled with wollastonite or bentonite to sorption of heavy metals from aqueous solutions

摘要

Biodegradable starch was filled with wollastonite or bentonite (10 or 20% by mass) and used for prodn. of thermoplastic starch pellets by extrusion. The pellets were used sep. for the removal of Cd2+, Pb2+ and Cu2+ ions from 10 mmol solns. for 24 h. Pellets filled with 20% bentonite showed the highest sorption ability when compared with starch pellets (increase in sorption by over 300% for Pb, by over 400% for Cd and by almost 500% for Cu).