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Electrodissolution aluminum electrode during an electrocoagulation acid whey

Prieto-García, Francisco and Callejas-Hernández, Judith and Reyes-Cruz, Víctor Esteban and Marmolejo-Santillán, Yolanda and Prieto-Méndez, Judith (2014) Electrodissolution aluminum electrode during an electrocoagulation acid whey. Dyna; Vol. 81, núm. 187 (2014); 129-136 DYNA; Vol. 81, núm. 187 (2014); 129-136 2346-2183 0012-7353 .

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URL oficial: http://revistas.unal.edu.co/index.php/dyna/article...

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Electrodissolution of aluminum in solutions containing chloride or sulfate ions during electrocoagulation acid whey, has been the objective of this work. The alkaline pH increases the rate of dissolution by several orders of magnitude. The electrolytic medium (Cl- or SO42-) does not seem to significantly influence the dissolution of aluminum, but increase the charge density, which helps in the electrochemical process. The results are related to the nature of aluminum hydroxide species formed during anodic dissolution. In acidic and neutral conditions, OH-ions from the cathode do not fully participate in the formation of neutral species of aluminum hydroxide and excess OH-ions increases the pH of the medium. In contrast, the pH decreases in highly alkaline conditions attributed to the consumption of large amounts of OH- ions to form an anionic species such as Al(OH)4- and Al(OH)52-, and other polymeric species of aluminun.

Tipo de documento:Artículo - Article
Información adicional:Derechos de autor reservados
Palabras clave:electrocoagulation, acid whey, chemical dissolution, electrodissolution, aluminum electodes
Unidad administrativa:Revistas electrónicas UN > Dyna
Código ID:44478
Enviado por : Dirección Nacional de Bibliotecas STECNICO
Enviado el día :25 Oct 2014 09:01
Ultima modificación:29 Enero 2015 15:23
Ultima modificación:29 Enero 2015 15:23
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