Paper Title:
Heavy Metals Immobilization by Hydroxyapatite-Alginate Composite in Simulated Gastric Fluid
  Abstract

Micrometric sphere beads of HA-alginate composite were produced to remove Pb2+ and Cd2+ from contaminated gastric fluid. It was shown that the composite was effective in Pb2+ and Cd2+ immobilization from high-contaminated simulated gastric fluid. X-ray diffraction and scanning electron microscope analyses performed on HA-alginate beads after the Pb2+ uptake showed that lead phosphate, (Pb10-x Cax (PO4)6Cl2), was precipitated on beads surface. X-ray diffraction patterns of HA powder after Cd2+ sorption experiments showed no evidence of other phases, however, dispersive energy spectrometer analyses of the HA-alginate confirmed the presence of Cd2+ on the composite surface. Desorption experiments in simulated enteric fluid showed that composite beads containing Pb2+ and Cd2+ remained stables for one hour in simulated gastrointestinal fluid. The results reinforce the hypothesis that HA-alginate composite can be a very efficient system for Pb2+ and Cd2+ uptake from contaminated gastrointestinal fluid preventing systemic contamination by bloody stream uptake.

  Info
Periodical
Key Engineering Materials (Volumes 361-363)
Main Theme
Edited by
Guy Daculsi and Pierre Layrolle
Pages
467-470
DOI
10.4028/www.scientific.net/KEM.361-363.467
Citation
E. Mavropoulos, N. C.C. da Rocha, M. H. M. Rocha-Leão, M. H. Prado da Silva, A. M. Rossi, "Heavy Metals Immobilization by Hydroxyapatite-Alginate Composite in Simulated Gastric Fluid", Key Engineering Materials, Vols. 361-363, pp. 467-470, 2008
Online since
November 2007
Export
Price
$35.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Daniel O. de Lima, Marcelo Henrique Prado da Silva, Jose B. de Campos, Antonella M. Rossi, Marisa Masumi Beppu
Abstract:Calcium phosphates are widely used in medicine and dentistry. However, synthesis of these substances through precipitation methods still...
195
Authors: A. Yovana Pataquiva Mateus, M.P. Ferraz, F.J. Monteiro
Abstract:This study concerns the preparation and characterisation of microspheres associating alginate and two different types of hydroxyapatite...
243
Authors: Hui Wang, Hao Liang, Qi Peng Yuan, Tian Xin Wang
Abstract:Sulforaphane (SF) has been proved to be an effective anticancer agent according to its experiments both in vitro and in vivo....
539
Authors: S. Sriraksa, N. Sermkaew, S. Setthacheewakul, R. Wiwattanapatapee
III. Applications of Biomaterial
Abstract:Tetrahydrocurcumin (THC), one of the curcumin metabolites, exhibits pharmacological activities such as antioxidant, anti-inflammatory and...
517
Authors: Wen Chao Wang, Xiao Mei Ma, Wei Huan Xu, Yin Yin Li, Quan Ji, Yan Zhi Xia
Chapter 1: Materials Engineering. Technologies and Processing
Abstract:Temperature-sensitive calcium alginate-based microspheres were prepared in two steps. Firstly, free-radical polymerization of...
145