Fluoride removal from water and wastewater with a bach cylindrical electrode using electrocoagulation


TEZCAN ÜN Ü., Koparal A. S., ÖĞÜTVEREN Ü.

CHEMICAL ENGINEERING JOURNAL, vol.223, pp.110-115, 2013 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 223
  • Publication Date: 2013
  • Doi Number: 10.1016/j.cej.2013.02.126
  • Journal Name: CHEMICAL ENGINEERING JOURNAL
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.110-115
  • Keywords: Defluoridation, Electrocoagulation, Aluminium, Iron, Treatment, LOOP AIRLIFT REACTOR, DRINKING-WATER, ALUMINUM ELECTRODES, DEFLUORIDATION, COAGULATION, FLOTATION, KINETICS
  • Anadolu University Affiliated: Yes

Abstract

In this study, an electrochemical reactor with a unique design was used for defluoridation. A rotating impeller aluminium cathode and a cylindrical aluminium anode, which until now have not been employed for fluoride removal in the literature, were used, and various operating parameters, such as the electrode material (aluminium and iron), the current density (in the range of 0.5-2 mA/cm(2)), the duration of electrolysis, the supporting electrolyte dosage (in the range of 0.01-0.03 M Na2SO4), the initial pH (in the range of 4-8) and the presence of other ions(Ca2+, Mg2+, PO43-, SO42-), were examined to achieve optimal performance of the process. The experimental results revealed that the fluoride removal could be enhanced at pH 6, higher current density and higher electrocoagulation time using aluminium electrode. The presence of Ca2+ and Mg2+ ions also enhanced the removal efficiency while SO42- and PO43-,ions effected adversely.