Abstract
Charge loading is the most important parameter for controlling the reaction rate within electrocoagulation process (EC) which determines the coagulant production rate, and it may also serve as a design parameter for the process. In the present study, arsenic removal from potable water by a batch EC process using iron plate electrodes was investigated with respect to charge loading and effects of operating parameters such as current density, operating time, initial arsenic concentration, ratio of electrode surface area over volume (S/V), and electrode connection mode on removal efficiency of arsenic were evaluated. The results showed that arsenic concentration of 150μg/L in monopolar series (MP-S) electrode connection mode during the EC process decreased the arsenic concentration to less than 6μg/L corresponding to removal efficiency of 95.1% (under the limit set by the World Health Organization) at current density of 2.5A/m2, charge loading of 50C/L, S/V of 10m2/m3 (ratio of electrode surface area over volume), EC time of 7.5min. Arsenic removed capacity and charge dosage rate at the optimum operating conditions were 2.8μg As removed/C and 4.00C/L/min. The adsorption of arsenic over electrochemically produced hydroxides and metal oxide complexes followed pseudo second-order adsorption model (r2>0.94). Operating costs were affected with current density, electrode connection mode, S/V and initial concentration of arsenic from potable water. The operating cost at MP-S connection mode was calculated as 0.00075€/m3at 150μg/L, 0.05A, 7.5min and 30C/L.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.