Abstract
In this study, influences of seven process variables such as initial pH (pH i ), applied current (i), operating time (t EC ), initial As(III) concentration (C o ), diameter of Fe ball anode (d p ), column height in the electrocoagulation (EC) reactor (h) and airflow rate (Q air ) 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 $/m 3 at the optimum operating conditions (a pH i of 8.5, 0.05 A, 4.94 min, d p of 9.24 mm, h of 7.49 cm, Q air 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.
Original language | English |
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Pages (from-to) | 775-785 |
Number of pages | 11 |
Journal | Separation Science and Technology |
Volume | 54 |
Issue number | 5 |
DOIs | |
Publication status | Published - 24 Mar 2019 |
Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2018, © 2018 Taylor & Francis.
Funding
The authors would like to thank TUBITAK for the financial support of this work (contract no: 111Y103).
Funders | Funder number |
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TUBITAK | 111Y103 |
Keywords
- Arsenite removal
- Fe ball anode
- electrocoagulation
- groundwater
- optimization