title: Preparation of drinking water used in water supply systems of the towns Zrenjanin and Temerin by electrochemical methods.
abstract: The aim of this work was the development and application of the pilot plant with the capacity of 1000 L/day for the purification of groundwater used for human consumption characterized with high concentration of arsenic and increased values of organic pollutants, ammonia, nitrites, color and turbidity. For that purpose, groundwater from the production wells supplying the towns Zrenjanin and Temerin (Vojvodina, Serbia) was used. Due to its complex composition, the purification system required the combination of the electroreduction/electrocoagulation, using iron and aluminum electrode plates with/without ozonation, followed by the electromagnetic treatment and the finally by the simultaneous ozonation/UV treatment. The electroreduction was used for the removal of nitrates, nitrites, and Cr(VI), while the removal of arsenic, heavy metals, suspended solids, color and turbidity required the application of the electrocoagulation with simultaneous ozonation. Organic contaminants and ammonia were removed completely in the last treatment step by applying the simultaneous ozonation/UV treatment. All measured parameters in the purified water were significantly lower compared to the regulated values. Under the optimum treatment conditions, the removal efficiencies for color, turbidity, suspended solids, total arsenic, total chromium, Ni(II), total copper, sulfates, fluorides, chemical oxygen demand, ammonia, nitrates, and nitrites were 100%. The removal efficiencies of the total manganese and iron were 85.19% and 97.44%, respectively, whilst the final concentrations were 4 and 7 μg/L, respectively.
authors: Advanced Energy Ltd., Zagreb, Croatia. vorescan@gmail.com
authors: Visnja
authors: V
authors: Orescanin
authors: Robert
authors: R
authors: Kollar
authors: Karlo
authors: K
authors: Nad
authors: Nenad
authors: N
authors: Mikulic
mesh_terms: D001151:Arsenic / Q000737:chemistry / Q000302:isolation & purification; D057919:Biological Oxygen Demand Analysis; D002857:Chromium / Q000032:analysis / Q000302:isolation & purification; D003300:Copper / Q000032:analysis / Q000302:isolation & purification; D060766:Drinking Water / Q000737:chemistry*; D055664:Electrochemical Techniques / Q000295:instrumentation / Q000379:methods*; D004566:Electrodes; D060587:Groundwater / Q000737:chemistry; D007501:Iron / Q000032:analysis / Q000302:isolation & purification; D019216:Metals, Heavy / Q000032:analysis / Q000737:chemistry; D010126:Ozone; D055771:Serbia; D013431:Sulfates / Q000032:analysis; D014874:Water Pollutants, Chemical / Q000737:chemistry; D018508:Water Purification / Q000379:methods*
chemical_list: D060766:Drinking Water; D019216:Metals, Heavy; D013431:Sulfates; D014874:Water Pollutants, Chemical; D002857:Chromium; D010126:Ozone; D003300:Copper; D007501:Iron; D001151:Arsenic