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Adsorption of Zn²⁺ by Sargassum horneri and Desorption at Simulated Marine Environment

Auteur(s):







Médium: papier de conférence
Langue(s): anglais
Conférence: 2012 International Conference on Civil, Architectural and Hydraulic Engineering (ICCAHE 2012), August 10-12th 2012, Zhangjiajie (China)
Publié dans:
Page(s): 1093-1099
DOI: 10.4028/www.scientific.net/AMM.209-211.1093
Abstrait:

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 Zn2+could arrive to more than 0.20 mg.g-1. Sargassum horneri pretreated with CaCl2can increase the adsorption rate. Infrared analysis results showed that carboxylic acid groups have an important contribution to Zn2+adsorption. The adsorption equilibrium of Zn2+could be represented by pseudo-second-order model and the capacity of dead alga for Zn2+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 Zn2+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.

Structurae ne peut pas vous offrir cette publication en texte intégral pour l'instant. Le texte intégral est accessible chez l'éditeur. DOI: 10.4028/www.scientific.net/AMM.209-211.1093.
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  • Reference-ID
    10327185
  • Publié(e) le:
    24.07.2019
  • Modifié(e) le:
    24.07.2019
 
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