Construction of Inorganic and Hybrid Biosorbents for Heavy Metal Ions Removal

International Journal Bioautomation

Lyudmila Kabaivanova¹  Georgi Chernev²  Juliana Ivanova² 

[1] "Stephan Angeloff" Institute of Microbiology, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., bl. 26, 1113 Sofia, Bulgaria;;

关键词: Hybrid biosorbents;    Algae;    Heteropolysaccharide;    Heavy metal ions;   

DOI  :  

来源: DOAJ

【 摘 要 】

Hybrid biosorbents, synthesized by the sol-gel method on the basis of Tetraethylorthosilicate (TEOS) proved to be efficient for the removal of the heavy metal ions from aqueous solutions. The potential use of immobilized in TEOS algal cells of the red microalga Porphyridium cruentum and its products - low and high molecular heteropolysaccharides to remove Cu(II), Cd(II) and Ni(II) ions was evaluated. A laboratory bioreactor was involved in this process. Sol-gel sorbent with TEOS only was used as a control system to the hybrid biosorbents. Their structural characterization was performed using different methods. The maximum adsorption capacities were registered for the biosorbents with immobilized algal biomass and for the preparations with TEOS and high molecular algal heteropolysaccharide: for Cu(II), Cd(II) and Ni(II), they were 18.771 and 21.715 mg·Cd·g-1 adsorbent; 16.662 and 17.545 mg·Ni/g-1 adsorbent and 40.633 and 34.431 mg·Cu·g-1 adsorbent, respectively. The adsorption of toxic Cu(II), Zn(II) and Ni(II) ions in the four types of sorbents proved to be effective. High percent of these ions removal was obtained during the first hours of the adsorption process.

【 授权许可】

Unknown