Arsenite removal from groundwater in a batch electrocoagulation process: Optimization through response surface methodology
| Autor: | Mehmet Kobya, Mehmet Salim Öncel, Erhan Demirbas, Ayşegül Yağmur Gören, E. Şık |
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| Rok vydání: | 2018 |
| Předmět: |
Chemistry
Process Chemistry and Technology General Chemical Engineering medicine.medical_treatment TEC Analytical chemistry Filtration and Separation 02 engineering and technology General Chemistry 010501 environmental sciences 01 natural sciences Electrocoagulation Anode chemistry.chemical_compound 020401 chemical engineering medicine Operating time Process optimization Response surface methodology 0204 chemical engineering Groundwater 0105 earth and related environmental sciences Arsenite |
| DOI: | 10.6084/m9.figshare.7180637.v1 |
| Popis: | In this study, influences of seven process variables such as initial pH (pHi), applied current (i), operating time (tEC), initial As(III) concentration (Co), diameter of Fe ball anode (dp), column height in the electrocoagulation (EC) reactor (h) and airflow rate (Qair) for removal of As(III) from groundwater by a new air-fed fixed-bed EC reactor were evaluated with a response surface methodology (RSM). The proposed quadratic model fitted very well with the experimental data for the responses. The removal efficiencies and operating costs were determined to be 99% and 0.01 $/m3 at the optimum operating conditions (a pHi of 8.5, 0.05 A, 4.94 min, dp of 9.24 mm, h of 7.49 cm, Qair of 9.98 L/min for 50 µg/L). This study clearly showed that the RSM in the EC process was a very suitable method to optimize the operating conditions at the target value of effluent As(III) concentration (10 µg/L) while keeping the operating cost to minimal and maximize the removal efficiency. |
| Databáze: | OpenAIRE |
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