- -

Electrochemical recovery of zinc from the spent pickling solutions coming from hot dip galvanizing industries. Galvanostatic operation

RiuNet: Institutional repository of the Polithecnic University of Valencia

Share/Send to

Cited by

Statistics

Electrochemical recovery of zinc from the spent pickling solutions coming from hot dip galvanizing industries. Galvanostatic operation

Show simple item record

Files in this item

dc.contributor.author Carrillo Abad, Jordi es_ES
dc.contributor.author García Gabaldón, Montserrat es_ES
dc.contributor.author Pérez Herranz, Valentín es_ES
dc.date.accessioned 2016-05-02T12:32:59Z
dc.date.available 2016-05-02T12:32:59Z
dc.date.issued 2012-06
dc.identifier.issn 1452-3981
dc.identifier.uri http://hdl.handle.net/10251/63344
dc.description.abstract [EN] The performance of an electrochemical reactor for zinc recovery from the spent pickling solutions coming from the hot dip galvanizing industry in galvanostatic operation is studied in this paper. These solutions mainly contain ZnCl 2 and FeCl 2 in aqueous HCl media. The effect of the applied current on the figures of merit (fractional conversion, current efficiency, space-time yield and specific energy consumption) of the electrochemical reactor is analyzed and compared with the values obtained in the potentiostatic operation. The applied current was selected in order to obtain similar electrode potential values to those applied in the potentiostatic operation and ranged between -150 and -700 mA. In the absence of iron in solution, as the current value was shifted towards more negative values, the space-time yield of zinc and its fractional conversion increased because of the increase in the zinc reduction rate, the electrode roughness and the hydrogen turbulence-promoting action. However, the increase in current values makes current efficiency to decrease due to the hydrogen evolution reaction (HER), which causes an increment in the specific energy consumption. The presence of iron in synthetic solutions led to a decrease in current efficiency associated with the reverse redox Fe 2+/Fe 3+ system and to the enhancement of the HER, which also induced increments in the local pH and the subsequent zinc redissolution. These adverse effects related to the presence of iron are greater in galvanostatic mode than in potentiostatic one. On the contrary, the additives present in the real spent pickling baths improve the zinc electrodeposition rate compared with the behavior of synthetic mixtures of zinc and iron solutions but the zinc redissolution is enhanced. es_ES
dc.description.sponsorship Authors want to express their gratitude to the Universidad Politecnica de Valencia for the economical support in the project reference PAID-06-08, and to the Generalitat Valenciana for the financing of the project reference GV/2010/029.
dc.language Inglés es_ES
dc.publisher Electrochemical Science Group es_ES
dc.relation UPV/PAID-06-08 es_ES
dc.relation GV/GV/2010/029 es_ES
dc.relation.ispartof International Journal of Electrochemical Science es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Galvanostatic operation es_ES
dc.subject Hydrogen evolution reaction es_ES
dc.subject Iron es_ES
dc.subject Pickling solutions es_ES
dc.subject Zinc electrodeposition es_ES
dc.title Electrochemical recovery of zinc from the spent pickling solutions coming from hot dip galvanizing industries. Galvanostatic operation es_ES
dc.type Artículo es_ES
dc.rights.accessRights Abierto es_ES
dc.description.bibliographicCitation Carrillo Abad, J.; García Gabaldón, M.; Pérez Herranz, V. (2012). Electrochemical recovery of zinc from the spent pickling solutions coming from hot dip galvanizing industries. Galvanostatic operation. International Journal of Electrochemical Science. 7(6):5442-5456. http://hdl.handle.net/10251/63344 es_ES
dc.description.accrualMethod Senia es_ES
dc.relation.publisherversion www.electrochemsci.org/papers/vol7/7065442.pdf es_ES
dc.description.upvformatpinicio 5442 es_ES
dc.description.upvformatpfin 5456 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 7 es_ES
dc.description.issue 6 es_ES
dc.relation.senia 230763 es_ES
dc.contributor.funder Universitat Politècnica de València
dc.contributor.funder Generalitat Valenciana


This item appears in the following Collection(s)

Show simple item record