Removal of arsenate by electrocoagulation reactor using aluminum ball anode electrodes

A. Y. Gören*, M. S. Öncel, E. Demirbas, E. Şık, M. Kobya

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


The aim of this research was to remove arsenate (As(V)) from groundwater using an air-injected electrocoagula-tion (EC) reactor with aluminum (Al) ball anodes. The effects of seven operating variables – initial pH, applied current (i), operating time (tEC), initial As(V) concentration (Co), Al ball anode diameter (dp), reactor column height (h), and airflow rate (Qair) were investigated with a Box-Behnken statistical experimental design. ANOVA results from the quadratic model equations indicated that the model fitted very well with the experimental data for the responses, which were removal efficiency, operating cost (OC), As(V) adsorption capacity, and effluent concentration (R2 ≥ 0.87). The most effective parameters were applied current, operating time, and anode height for As(V) removal efficiency in the EC reactor, while initial pH, Al anode diameter, and air flow rate had limited effect on removal. The model predicted a residual As(V) concentration below 10 μg/L under the optimum operating conditions (pH 7.03, 0.29 A, 10.5 min, dp 7.5 mm, 613.4 μg/L, h 5.1 cm, and Qair 6.4 L/min). The maximum As(V) removal efficiency and minimum OC in the EC process were almost 99% and 0.442 $/m3, respectively.

Original languageEnglish
Pages (from-to)753-763
Number of pages11
JournalWater Practice and Technology
Issue number4
Publication statusPublished - 1 Dec 2018
Externally publishedYes

Bibliographical note

Publisher Copyright:
© IWA Publishing 2018.


  • Al ball anodes
  • Arsenate removal
  • Box-Behnken design
  • Electrocoagulation


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