Arsenic removal from groundwater of Sivas-Şarkişla Plain, Turkey by electrocoagulation process: Comparing with iron plate and ball electrodes
| Autor: | Erhan Demirbas, Mehmet Salim Öncel, Fuat Özyonar, E. Şık, Mehmet Kobya |
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| Přispěvatelé: | [Kobya, M. -- Oncel, M. S.] Gebze Tech Univ, Dept Environm Engn, TR-41400 Gebze, Turkey -- [Ozyonar, F.] Cumhuriyet Univ, Dept Environm Engn, Sivas, Turkey -- [Demirbas, E. -- Sik, E.] Gebze Tech Univ, Dept Chem, TR-41400 Gebze, Turkey, KOBYA, Mehmet -- 0000-0001-5052-7220 |
| Rok vydání: | 2015 |
| Předmět: |
Operating cost
Materials science Process Chemistry and Technology medicine.medical_treatment Metallurgy Airflow Charge density chemistry.chemical_element Pollution Electrocoagulation Anode chemistry Electrode medicine Arsenic removal Chemical Engineering (miscellaneous) Iron plate anodes Waste Management and Disposal Current density Arsenic Iron ball anodes |
| Zdroj: | Journal of Environmental Chemical Engineering. 3:1096-1106 |
| ISSN: | 2213-3437 |
| DOI: | 10.1016/j.jece.2015.04.014 |
| Popis: | WOS: 000217986800058 In the present study, laboratory scale experiments were conducted with the air-fed electrocoagulation (EC) reactor using iron (Fe) ball and plate anodes in a batch mode to assess their efficiency in the removal of arsenic from Sivas Sarkisla groundwater (SSG). Effects of the operating parameters namely, initial pHi (6.6-8.6), applied current (0.10-0.50 A), area of electrode (210-630 cm(2)), airflow rate (0-6 L/min) and operating time (0-20 min) for Fe ball and plate anodes on the removal efficiency of arsenic were investigated and operating costs for the treated SSG were calculated for each type electrode. The pH did not have significant effect on the arsenic removal in the pH range 6.6-8.6 for both type electrodes, but higher current density, airflow rate and lowest surface area of electrode led removal of arsenic rapidly from SSG. The optimum operating conditions determined to be pH 7.6, 0.30 A, airflow rate of 6 L/min, anode surface area of 210 cm(2) resulted in removal efficiency of 99.3% and operating cost of 1.55 $/m(3) at 20 min (charge density of 360 C/L or 3.731 F/m(3)) for Fe ball electrodes and 96.9% and 0.101 $/m(3) at 6 min (charge density of 108 C/L or 1.119 F/m(3)) for Fe plate electrodes, respectively. As a comparison, Fe plate electrodes performed better for reducing operating time from 20 to 6 min which affected the operating cost considerably. Both type electrodes in the EC were able to bring down arsenic concentration to < 10 mg/L at the optimum operating conditions. (C) 2015 Elsevier Ltd. All rights reserved. TUBITAK-CAYDAG [111Y103] The authors would like to thank TUBITAK-CAYDAG for financial support of this work under contract 111Y103. |
| Databáze: | OpenAIRE |
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