Article ID Journal Published Year Pages File Type
6664108 Journal of Environmental Chemical Engineering 2018 26 Pages PDF
Abstract
In this study, laboratory scale experiments were conducted with the horizontal continuous-flow EC reactor as a standalone technology with the capacity of 300 L/day with iron (Fe) plate bipolar electrodes to assess its efficiency in the removal of arsenic from raw groundwater without pre- and post-treatment pH modification of groundwater. The optimum EC reactor operating conditions were determined to be current density of 1.98 A/m2, charge loading of 54 C/L, flow rate of 12 L/h. The EC reactor was able to remove 96% of arsenic from raw groundwater and met respective World Health Organization (WHO) guideline value of 10 μg As/L within the 4 h experimental runs. The Fe electrode polarity change at 30 min successfully controlled passivation of Fe electrodes and enabled a steady reactor operation with the high As removal efficiency. Residual Fe concentration in treated groundwater was in the range 0.17 ± 0.07 mg/L and met WHO guideline value for drinking water. The preliminary estimated operating cost at the optimum operating conditions was 0.0135 €/m3.
Related Topics
Physical Sciences and Engineering Chemical Engineering Chemical Engineering (General)
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