[Home ] [Archive]    
:: Main :: About :: Current Issue :: Archive :: Search :: Submit :: Contact ::
:: Volume 10, Number 6 (November-December 2016) ::
IJT 2016, 10(6): 15-21 Back to browse issues page
Removal of Cr(VI) Species from Aqueous Solution by Different Nanoporous Materials
Mohammad Ghashghaee *, Vahid Farzaneh
Department of Process Design and Construction, Iran Polymer and Petrochemical Institute, Tehran, Iran. , m.ghashghaee@ippi.ac.ir
Abstract:   (1006 Views)

Background: The removal of toxic metals from sewage and wastewaters is one of the most important concerns in the twenty first century. The removal of poisonous Cr(VI) from aqueous solution by different low-cost available nanoporous adsorbents was investigated in the present study. 

Methods: Fumed silica, bentonite (BN), hydrotalcite (HT), MCM-41, Na-Y, mordenite (MOR) and SAPO-34 were used at different adsorbent-to-metal ion ratios. Two predominant species of Cr were considered including chromate and hydrogen chromate ions.

Results: Both HT and Na-Y adsorbed the toxic bichromate ions more favorably than other sorbents. Overall, the efficiency of the Cr removal followed the sequence of HT > SAPO-34 > MOR > MCM-41 > Na-Y > silica > BN. Because of its surface chemistry, HT with an uptake of 65.2 mg/g showed the highest toxic abatement among the seven adsorbents investigated under the acidic conditions, followed by the microporous materials SAPO-34 and MOR with uptakes of 41.2 and 41.0 mg/g, respectively.

Conclusion: Both HT and Na-Y adsorbed the toxic bichromate ions more favorably than other sorbents. The high pore volume and the apparent surface area of a non-functionalized MCM-41 were not effective in the adsorption of Cr compounds. Overall, HT was the best choice owing to its appropriate surface chemistry with respect to the Cr oxygenates.

Keywords: Adsorption, Clays, Chromium, Environment, Toxic Metals, Zeolites
Full-Text [PDF 775 kb]   (790 Downloads)    
Type of Study: Research | Subject: General
Send email to the article author

Add your comments about this article
Your username or email:

Write the security code in the box >



XML     Print


Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Ghashghaee M, Farzaneh V. Removal of Cr(VI) Species from Aqueous Solution by Different Nanoporous Materials. IJT. 2016; 10 (6) :15-21
URL: http://ijt.arakmu.ac.ir/article-1-507-en.html
Volume 10, Number 6 (November-December 2016) Back to browse issues page
مجله سم شناسی و مسمومیتهای ایران Iranian Journal of Toxicology
Persian site map - English site map - Created in 0.051 seconds with 789 queries by yektaweb 3503