Print this page Email this page
Users Online: 203
Home About us Editorial board Search Browse articles Submit article Instructions Subscribe Contacts Login 
Year : 2012  |  Volume : 1  |  Issue : 1  |  Page : 26

Isotherms and kinetics of lead and cadmium uptake from the waste leachate by natural and modified clinoptilolite

1 Environment Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
2 North Khorasan University of Medical Sciences, Bojnourd, Iran
3 Department of Environmental Health Engineering, School of Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
4 Department of Environmental Health Engineering, School of Health, Tehran university of Medical Sciences, Tehran, Iran
5 Department of Computer Engineering, Islamic Azad University, Mehriz Branch, Mehriz, Yazd, Iran

Correspondence Address:
Mohsen Sadani
Department of Environmental Health Engineering, School of Health, Shahid Sadoughi University of Medical Sciences, Yazd
Login to access the Email id

Source of Support: None, Conflict of Interest: None

DOI: 10.4103/2277-9183.98385

Rights and Permissions

Aims: The purpose of this study is to investigate the feasibility of the absorption of lead and cadmium from the leachate, by natural zeolite clinoptilolite and improving the zeolite ability by a modified surface. Materials and Methods: To examine the absorption ability of these two metals (lead and cadmium), the variables, such as, type of sorbent, sorbent concentration, and contact time were studied. Zeolite samples were analyzed by X-ray florescence, the spectrum of X-ray diffraction, and Brunauer-Emmett-Teller (BET). Results: The absorption efficiency of the modified zeolites were increased from 4.2 and 5.3 percent to 71.6 and 75.2 percent for lead and cadmium, respectively. With increasing the surfactant concentration from 2 to 20 mmol/L, the absorption efficiency of modified zeolite for lead and cadmium was increased to 71 and 74%, respectively. The best isotherm model for lead adsorption was Freundlich model, with a determination coefficient equal to 0.99, and for cadmium it was Langmuir model with a determination coefficient equal to 0.99. Conclusions: The modified zeolite with surfactant can be used as an appropriate adsorbent for the separation of heavy metals from waste Leachate. Lead and cadmium were absorbed in a single layer on the surface of the modified zeolite with surfactant, comparing different isoterm models, indicated that the capacity of the modified zeolite for lead adsorption was more than cadmium adsorption, but cadmium was absorbed with higher energy.

Print this article     Email this article
 Next article
 Previous article
 Table of Contents

 Similar in PUBMED
   Search Pubmed for
   Search in Google Scholar for
 Related articles
 Citation Manager
 Access Statistics
 Reader Comments
 Email Alert *
 Add to My List *
 * Requires registration (Free)

 Article Access Statistics
    PDF Downloaded526    
    Comments [Add]    
    Cited by others 4    

Recommend this journal