title: Removal of arsenic, phosphates and ammonia from well water using electrochemical/chemical methods and advanced oxidation: a pilot plant approach.
abstract: The purpose of this work was to develop a pilot plant purification system and apply it to groundwater used for human consumption, containing high concentrations of arsenic and increased levels of phosphates, ammonia, mercury and color. The groundwater used was obtained from the production well in the Vinkovci County (Eastern Croatia). Due to a complex composition of the treated water, the purification system involved a combined electrochemical treatment, using iron and aluminum electrode plates with simultaneous ozonation, followed by a post-treatment with UV, ozone and hydrogen peroxide. The removal of the contaminant with the waste sludge collected during the electrochemical treatment was also tested. The combined electrochemical and advanced oxidation treatment resulted in the complete removal of arsenic, phosphates, color, turbidity, suspended solids and ammonia, while the removal of other contaminants of interest was up to 96.7%. Comparable removal efficiencies were obtained by using waste sludge as a coagulant.
authors.affiliation: a Advanced Energy Ltd. , Zagreb , Croatia.
authors.forename: Visnja
authors.initials: V
authors.lastname: Orescanin
authors.forename: Robert
authors.initials: R
authors.lastname: Kollar
authors.forename: Karlo
authors.initials: K
authors.lastname: Nad
authors.forename: Ivan
authors.initials: I
authors.lastname: Halkijevic
authors.forename: Marin
authors.initials: M
authors.lastname: Kuspilic
authors.forename: Stefica
authors.initials: S
authors.lastname: Findri Gustek
mesh_terms: D000535:Aluminum / Q000737:chemistry; D000641:Ammonia / Q000737:chemistry*; D001151:Arsenic / Q000737:chemistry*; D004566:Electrodes; D060587:Groundwater / Q000737:chemistry; D006861:Hydrogen Peroxide / Q000737:chemistry; D007501:Iron / Q000737:chemistry; D010084:Oxidation-Reduction; D010126:Ozone / Q000737:chemistry; D010710:Phosphates / Q000737:chemistry*; D014466:Ultraviolet Rays; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods
chemical_list: D010710:Phosphates; D014874:Water Pollutants, Chemical; D010126:Ozone; D000641:Ammonia; D006861:Hydrogen Peroxide; D000535:Aluminum; D007501:Iron; D001151:Arsenic
keywords: Aluminum anode; UV; ammonia; arsenic; electrocoagulation; heavy metals; hydrogen peroxide; iron anode; ozonation; waste sludge