We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Modification of activated carbon by 4-(8-hydroxyquinoline-Azo)benzamidine for removal of Hg<sup>2+</sup> from aqueous solutions.
- Authors
Hatami, Fatemeh; Faghihian, Hossein
- Abstract
In this research, the activated carbon prepared from walnut shells was chemically activated by ZnCl2 and modified by 4-(8-hydroxyquinoline-azo)benzamidine. The synthesized adsorbent was used for the removal of Hg2+ from aqueous solutions. The effect of different parameters including pH, initial concentration, adsorbent dose, contact time, and temperature was studied and optimized. At optimized conditions, pH = 2, contact time of 20 min, initial concentration of 600 mg/L, and 0.01 g sorbent, the adsorption capacity of 118 mg/g was obtained which was higher than the reported values. The adsorbent was highly selective for Hg2+. The results showed that the adsorption process was spontaneous and exothermic. Regeneration of the modified activated carbon by acid treatment showed that the adsorbent retained more than 84% of its initial adsorption capacity after four consecutive regeneration cycles. © 2015 American Institute of Chemical Engineers Environ Prog, 34: 1562-1567, 2015
- Subjects
ACTIVATED carbon; BENZAMIDINE; ADSORPTION (Chemistry); CARBON foams; LIGHT elements
- Publication
Environmental Progress & Sustainable Energy, 2015, Vol 34, Issue 6, p1562
- ISSN
1944-7442
- Publication type
Article
- DOI
10.1002/ep.12141