Print this page Email this page
Users Online: 266
Home About us Editorial board Search Browse articles Submit article Instructions Subscribe Contacts Login 
Year : 2013  |  Volume : 2  |  Issue : 1  |  Page : 17

Arsenic removal by coagulation using ferric chloride and chitosan from water

Environment Research Center, Isfahan University of Medical Sciences (IUMS), Isfahan, Iran, and Department of Environmental Health Engineering, School of Health, IUMS, Isfahan, Iran

Correspondence Address:
Bijan Bina
Environment Research Center, Isfahan University of Medical Sciences, Hezar Jerib Avenue, Isfahan
Login to access the Email id

Source of Support: The technical and financial support are provided by Isfahan University of Medical Sciences (IUMS) and Environment Research Center, Isfahan, Iran,, Conflict of Interest: None

DOI: 10.4103/2277-9183.110170

Rights and Permissions

Aims: In this study, the effect of arsenite and arsenate removal in synthetic water by coagulation using ferric chloride (FeCl 3 ) as coagulant and chitosan as coagulant aid were investigated. b>Materials and Methods: A conventional jar test apparatus was used to evaluate the coagulation process. The effects of different conditions of pH (5.5-9), coagulant doses of FeCl 3 0-60 mg/l), Arsenic speciation (As (V) and As (III)), Chitosan as coagulant aid, and initial arsenic concentrations (0.2-2 mg/l) to Arsenic removal was investigated by considering the residual arsenic and iron after coagulation. Results: The finding showed that the optimum pH for FeCl 3 as a coagulant to As (V) and As (III) removal was 7. As (V) removal efficiency of 90% or higher by FeCl 3 alone were achieved for initial As (V) concentration 0.2-2 mg/l at optimum dosages (15-30 mg/l). In contrast with As (V) removal, about 60% of the As (III) were removed in comparable conditions. The optimal dosage of chitosan was determined to be 0.5 mg/l. When chitosan (0.5 mg/l) was used as coagulant aid with FeCl 3 , the efficiency removal was enhanced almost to 100% and 80% for As (V) and As (III) removal, respectively. The optimum dosage of FeCl 3 was reduced, especially at low initial concentration of arsenic. Conclusions: Chitosan as natural coagulant aid improved arsenic removal efficiency by coagulation process using FeCl 3 . This method can be used for regions with drinking water contaminated with initial arsenic concentration less than 1 000 μg/l.

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 Downloaded744    
    Comments [Add]    
    Cited by others 13    

Recommend this journal