Removal of zinc ions from model wastewater using electrodeposition

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Removal of zinc ions from model wastewater using electrodeposition

Popis výsledku v původním jazyce

The present study deals with the electrochemical treatment of the wastewater generated from viscose fibres industry. Suitable process for electrochemical treatment of rayon wastewater is electrodeposition. Process is achieved by passing an electric current through a solution containing dissolved metal ions. Electrodeposition is the process which leads to the deposition of a metallic coating on a cathode in an electrochemical cell. Zinc has a standard reversible potential Eo = - 0.76 V (standard hydrogen electrode (SHE)) at 25 oC that is more negative than that of iron (Fe/Fe2+ = - 0.44 V/SHE. Current density 5 mA/cm2 appears to be too low for satisfactory rate of electrodeposition, but current density only 10 or 20 mA/cm2 provides, after 16 h, 76.5% resp. 92% yield of regenerated zinc and all at current efficiency 27.2 kWh/m3 resp. 41.4 kWh/m3. It leads to conclusion that electrodeposition for regeneration of zinc from wastewater generated by the production of viscose fibres is a perspective technology. It is preferred to work at not adjusted pH of washing water (pH = 2.5) and low current density. But it is a little bit difficult in terms of capacity of needed equipment.

Název v anglickém jazyce

Removal of zinc ions from model wastewater using electrodeposition

Popis výsledku anglicky

The present study deals with the electrochemical treatment of the wastewater generated from viscose fibres industry. Suitable process for electrochemical treatment of rayon wastewater is electrodeposition. Process is achieved by passing an electric current through a solution containing dissolved metal ions. Electrodeposition is the process which leads to the deposition of a metallic coating on a cathode in an electrochemical cell. Zinc has a standard reversible potential Eo = - 0.76 V (standard hydrogen electrode (SHE)) at 25 oC that is more negative than that of iron (Fe/Fe2+ = - 0.44 V/SHE. Current density 5 mA/cm2 appears to be too low for satisfactory rate of electrodeposition, but current density only 10 or 20 mA/cm2 provides, after 16 h, 76.5% resp. 92% yield of regenerated zinc and all at current efficiency 27.2 kWh/m3 resp. 41.4 kWh/m3. It leads to conclusion that electrodeposition for regeneration of zinc from wastewater generated by the production of viscose fibres is a perspective technology. It is preferred to work at not adjusted pH of washing water (pH = 2.5) and low current density. But it is a little bit difficult in terms of capacity of needed equipment.

Druh

D - Stať ve sborníku

CEP obor

CG - Elektrochemie

OECD FORD obor

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Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

43rd International Conference of SSCHE : proceedings

ISBN

978-80-89597-35-2

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

604-609

Název nakladatele

Slovenská spoločnosť chemického inžinierstva

Místo vydání

Bratislava

Místo konání akce

Tatranské Matliare

Datum konání akce

23. 5. 2016

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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