Naslov
REMOVAL OF ZINC AND COPPER FROM WASTEWATER BY POTENTIOSTATIC DEPOSITION

Autori
Touabi, Noura ; Martinez, Sanja ; Bounoughaz, Moussa

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
7th International Scientific and Professional Conference WATER FOR ALL, Book of Abstracts / Habuda-Stanić, Mirna - Osijek : Sveučilište Josipa Jurja Strossmayera u Osijeku, 2017, 41-41

ISBN
978-953-7005-47-4

Skup
7. međunarodni znanstveno-stručni skup: Voda za sve = 7th International Scientific and Professional Conference: Water for all

Mjesto i datum
Osijek, Hrvatska, 09.03.2017. - 10.03.2017

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
zinc ; surfactant ; electrochemical recovery
(zinc recovery ; surfactant ; electrochemical)

Sažetak
Water is a scarce natural resource in many countries around the world. Besides being an economically impeding factor, the lack of clean water may present a serious health and environmental issue. Industry is both, a big water consumer and a big effluent source. Industrial effluents are loaded with pollutants, especially heavy metals, and present critical environmental problem of today. Treating of wastewater with the aim of reducing environment pollution and reclaiming water, is therefore of primary interest. It has been found that 83% of industrial discharges contain zinc or one of its compounds. Copper, nickel, chromium and lead or their compounds were respectively found to be present in the following percentages: 75%, 58%, 54% and 37%. This data underline the importance of removing zinc and copper from wastewaters. In the present work, the possibility of the recovery of copper and zinc from wastewater by potentiostatic deposition was studied. Copper and Zinc were deposited potentiostatically on a graphite electrode with graphite auxiliary electrode and saturated calomel electrode as a reference. Cyclic voltammetry, electrochemical impedance spectroscopy and chronoamperometry were used to characterize the kinetics of nucleation and electroplating of copper and zinc deposits. The study of the effect of the scanning rate on cyclic voltammograms shows that both copper and zinc were deposited under diffusion control in a quasi reversible process. Characterization of the deposits formed was done by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). Excellent efficiency of copper and zinc recovery was achieved with deposits easily removable from the cathode by simple scratching due to the rough structure obtained under potentiostatic deposition.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

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