Simultaneous application of electrochemical and coagulation processes in surface water treatment

Rabbani, D. and Bigdeli, M. and Mahvi, A. and Akbari, H. (2013) Simultaneous application of electrochemical and coagulation processes in surface water treatment. Life Science Journal, 10 (SUPPL.). pp. 192-198.

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Abstract

Background and Aim of the study: coagulants have been being used for long to treat surface water and reduction of their use can bring about great economic advantages. Various studies have been reported the acceptable effect of electrochemical process on turbidity elimination. Nonetheless, the effect of simultaneous application of these two processes has not been investigated yet. This study aims to investigate the effect of simultaneous application of electrochemical and coagulation processes on the reduction of coagulant use in surface water treatment. Materials and Methods: this study is experimental type which has been carried out on laboratory scale in a closed system. Water samples were weekly taken from Karaj river-Bilaghan basin during April and their optimum amount of Ferric Chloride (FeCl3) and pH were determined by Jar test. Then, the simultaneous effects of electrochemical and coagulation processes was assessed. Electrochemical process was applied to samples for one minute using iron electrodes along with intense stirring. Turbidity of samples was measured according to the standard method. Results: the optimum amounts of Ferric Chloride and pH were found to be 50 mg.l-1 and 8.5, respectively. After processing, the average turbidity of samples decreased from 9.43 NTU to 0.78 NTU. The simultaneous application of electrochemical process with an electrical current of 0.1 A along with the coagulation process using 25 mg.l-1 and 37.5 mg.l-1 of Ferric Chloride reduced the average turbidity by 89.19 and 90.22, respectively. Conclusion: results showed that simultaneous application of electrochemical process with a current density of 0.315 mA.cm-2M can reduce the concentration of coagulant by half of its optimum amount.

Item Type: Article
Additional Information: cited By 0
Subjects: Health Professions
Divisions: Faculty of Health > Department of Environmental health
Depositing User: editor . 2
Date Deposited: 03 Mar 2017 14:41
Last Modified: 03 Mar 2017 14:41
URI: http://eprints.kaums.ac.ir/id/eprint/662

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