Volume 27, Issue 3 (Monthly_Jun 2016)                   Stud Med Sci 2016, 27(3): 240-247 | Back to browse issues page

XML Persian Abstract Print

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

Aghapour A A, Nemati S, Mohammadi A, Jahani H, Karimzadeh S. REMOVAL oF HUMIC ACID FROM WATER RESOURCES USING AL aND FE SALTS DURING CONVENTIONAL COAGULATION. Stud Med Sci. 2016; 27 (3) :240-247
URL: http://umj.umsu.ac.ir/article-1-3432-en.html
Department of Environmental Health Engineering, FaYazdculty of Public Health, shahid sadoughi University of Medical Sciences, Iran , mohammadiurm@gmail.com
Abstract:   (5781 Views)

Background & Aims: Humic acid is a major agent in trihalomethanes (THMs) formation during chlorination process, which are known as carcinogens. The aim of this study were to investigate the removal of humic acid by three coagulants including PACl, alum and ferric chloride from water sources and their  effect on zeta potencial.

Materials & Methods: This study was conducted  experimentally in lab scale. Experiments were carried out in a batch reactor using a synthetic solution with humic acid concentration of 10 mg/l, pH 5, 7 and 9, and the coagulant dosages of 10, 20 and 30 mg/l (ferric chloride, alum and PACl, respectively). Also zeta potential and THMs formation reduction were evaluated under optimal condition  for humic acid removal.

Results: The results showed that under optimal dosages of the coagulants the highest removal efficiency was related to the ferric chloride with 89 %. Removal efficiency for PACl and alum were 88% and 81%, respectively. However, only the application of ferric chloride decreased the SUVA index down to the USEPA permissible limits (less than 2 L/mg m). Also in optimal condition pH, zeta potential and trihalomethanes values were gained more than 7, -15 mV and less than 50 ppb.

Conclusion: Ferric chloride can be used for treatment of water containing humic acid to decrease SUVA index down to the  permission ranges. But the use of aluminum salts as coagulants may lead to THMs formation. Chlorinated water treated with Ferric chloride results in notable reduction in the amount of trihalomethanes (ppb <80). Also, according to the zeta potential values, the adsorption phenomena was suggested as a dominant mechanism for the removal of humic acid using ferric chloride.

SOURCE: URMIA MED J 2016: 27(3): 247 ISSN: 1027-3727

Full-Text [PDF 690 kb]   (1876 Downloads)    
Type of Study: Research | Subject: بهداشت

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

Send email to the article author

Rights and permissions
Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

© 2022 CC BY-NC 4.0 | Studies in Medical Sciences

Designed & Developed by : Yektaweb