Lead and Cadmium Immobilization by Polymeric Sponges Coated with Hydroxyapatite

Abstract:

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Polymeric sponges coated with hydroxyapatite were used in lead and cadmium uptake experiments in order to mimetizes heavy metal incorporation by bone tissue. The hydroxyapatite-coated sponges (S-HA) were obtained by hydrothermal alkali conversion from monetite. The results showed that S-HA were efficient in immobilizing Pb and Cd. The uptake experiments using hydroxyapatite powder (HA) removed almost 100% of Pb2+ and 59% of Cd2+. When polymeric sponges coated with hydroxyapatite were used, the removal of Cd2+ and Pb2+ decreased, respectively, to closely 14 % and 74%, after 24 hours sorption. Before and after sorption experiment MEV analysis indicated precipitation of pyromorphite on hydroxyapatite-coated sponges.

Info:

Periodical:

Key Engineering Materials (Volumes 396-398)

Main Theme:

Edited by:

Marcelo Prado and Cecília Zavaglia

Pages:

561-564

DOI:

10.4028/www.scientific.net/KEM.396-398.561

Citation:

E. Mavropoulos et al., "Lead and Cadmium Immobilization by Polymeric Sponges Coated with Hydroxyapatite", Key Engineering Materials, Vols. 396-398, pp. 561-564, 2009

Online since:

October 2008

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