Volume 17, Issue 66 (winter 2014)                   JWSS 2014, 17(66): 25-34 | Back to browse issues page

XML Persian Abstract Print


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

Farahi S, Hamidpour M, Shirani H, Dashti H, Heshmati M. Sorption of Cd from Aqueous Solutions by Natural and Polyacrylamide-Modified Montmorillonite. JWSS. 2014; 17 (66) :25-34
URL: http://jstnar.iut.ac.ir/article-1-1999-en.html
, mohsen_hamidpour@yahoo.com
Abstract:   (6877 Views)
This research was conducted to study the effect of natural and polyacrylamide-modified montmorillonite on the sorption of Cd from aqueous solutions. The sorption of Cd on the sorbents was studied as a function of pH (Cd concentration: 10 mg L-1) in the range of 4-8.5, and as a function of metal concentration (Cd concentration in the range of 1-10 mgL-1) using a 24h batch equilibration. Experimental and modeling data from equilibrium investigations revealed that the Koble–Corrigan sorption model describes the interaction between Cd and the two sorbents better than the Freundlich and Langmuir models. The values of KF constant of Freundlich and KL constant of Langmuir models were higher for sorption of Cd onto the modified montmorillonite than for those of natural montmorillonite. Maximum sorption capacity calculated from the Langmuir model was 0.6 and 0.7 mg g-1 for natural and modified montmorillonite, respectively. These values are indications of high sorption affinity of Cd to montmorillonite in the presence of polyacrylamide. The amount of Cd sorbed by modified montmorillonite decreased by increasing solution pH while Cd sorption by natural montmorillonite increased by increasing the solution pH.
Full-Text [PDF 372 kb]   (1522 Downloads)    
Type of Study: Research | Subject: Ggeneral
Received: 2012/02/29 | Accepted: 2012/08/6 | Published: 2014/02/9

Add your comments about this article : Your username or Email:
CAPTCHA

© 2020 All Rights Reserved | JWSS - Isfahan University of Technology

Designed & Developed by : Yektaweb