In:
Applied Mechanics and Materials, Trans Tech Publications, Ltd., Vol. 209-211 ( 2012-10), p. 1093-1099
Kurzfassung:
The adsorption of Zn2+ from simulated seawater onto biomaterial derived from the macroalgae Sargassum horneri was investigated via batch experiments. The highest adsorption rate was 96.9%, which found in the lower Zn2+ concentration solution where pH was 8.0 and temperature was 15°C, and the maximum adsorption capacity of dead Sargassum horneri particle to Zn 2+ could arrive to more than 0.20 mg.g -1 . Sargassum horneri pretreated with CaCl 2 can increase the adsorption rate. Infrared analysis results showed that carboxylic acid groups have an important contribution to Zn 2+ adsorption. The adsorption equilibrium of Zn 2+ could be represented by pseudo-second-order model and the capacity of dead alga for Zn 2+ was approximately constant. Conclusions could be drawn that Sargassum horneri is a kind of efficient biosorbent for the treatment of waste waters containing heavy metals. It was because Zn 2+ can easily be desorbed by competition between the hydrogen ions and metal ions on the cell surface binding sites, that hydrochloric acid was proved to have economic feasibility.
Materialart:
Online-Ressource
ISSN:
1662-7482
DOI:
10.4028/www.scientific.net/AMM.209-211
DOI:
10.4028/www.scientific.net/AMM.209-211.1093
Sprache:
Unbekannt
Verlag:
Trans Tech Publications, Ltd.
Publikationsdatum:
2012
ZDB Id:
2251882-4