Elución de iones de níquel desde esferas de alginato en un medio ácido

Alvaro Aracena; Francisco Cárcamo; Óscar Jerez; Robinson Constanzo

doi:10.3989/revmetalm.062

Elución de iones de níquel desde esferas de alginato en un medio ácido

Translated title of the contribution: Elution of nickel ions from alginate beads in an acid media

Alvaro Aracena, Francisco Cárcamo, Óscar Jerez, Robinson Constanzo

SCHOOL OF CHEMICAL ENGINEERING

Research output: Contribution to journal › Article › peer-review

Abstract

Elution of nickel ions from alginate beads was studied in a temperature range of 2 to 80°C and a sulfuric acid concentration between 0.005 to 2.5 g L^-1. The elution mechanism was established by ion exchange between nickel and ions protons, obtaining a value of 93% elution at a temperature of 80°C and a H₂SO₄ concentration of 0.25 g L^-1. The influence of other acids on nickel elution was also studied. The nickel elution rate was significantly influenced by temperature and concentration of H₂SO₄. Elution kinetics of nickel ions was studied, and the 1-(1-α)^1/3=k_appt model properly described the kinetics of this reaction. The dependence of nickel elution on the sulfuric acid concentration was of the order of 0.33. Moreover, the intrinsic rate constants were determined and an activation energy value of 54.5 kJ mol^-1 was obtained for the temperature range studied. The results indicated that the nickel elution is a process controlled by chemical reactions.

Translated title of the contribution	Elution of nickel ions from alginate beads in an acid media
Original language	Spanish
Article number	e062
Journal	Revista de Metalurgia (Madrid)
Volume	52
Issue number	1
DOIs	https://doi.org/10.3989/revmetalm.062
State	Published - 1 Jan 2016

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title = "Eluci{\'o}n de iones de n{\'i}quel desde esferas de alginato en un medio {\'a}cido",

abstract = "Elution of nickel ions from alginate beads was studied in a temperature range of 2 to 80°C and a sulfuric acid concentration between 0.005 to 2.5 g L-1. The elution mechanism was established by ion exchange between nickel and ions protons, obtaining a value of 93% elution at a temperature of 80°C and a H2SO4 concentration of 0.25 g L-1. The influence of other acids on nickel elution was also studied. The nickel elution rate was significantly influenced by temperature and concentration of H2SO4. Elution kinetics of nickel ions was studied, and the 1-(1-α)1/3=kappt model properly described the kinetics of this reaction. The dependence of nickel elution on the sulfuric acid concentration was of the order of 0.33. Moreover, the intrinsic rate constants were determined and an activation energy value of 54.5 kJ mol-1 was obtained for the temperature range studied. The results indicated that the nickel elution is a process controlled by chemical reactions.",

keywords = "Alginate beads, Elution rate, Intrinsic kinetics, Nickel ions",

author = "Alvaro Aracena and Francisco C{\'a}rcamo and {\'O}scar Jerez and Robinson Constanzo",

note = "Publisher Copyright: {\textcopyright} 2016 CSIC.",

year = "2016",

month = jan,

day = "1",

doi = "10.3989/revmetalm.062",

language = "Spanish",

volume = "52",

journal = "Revista de Metalurgia (Madrid)",

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TY - JOUR

T1 - Elución de iones de níquel desde esferas de alginato en un medio ácido

AU - Aracena, Alvaro

AU - Cárcamo, Francisco

AU - Jerez, Óscar

AU - Constanzo, Robinson

PY - 2016/1/1

Y1 - 2016/1/1

N2 - Elution of nickel ions from alginate beads was studied in a temperature range of 2 to 80°C and a sulfuric acid concentration between 0.005 to 2.5 g L-1. The elution mechanism was established by ion exchange between nickel and ions protons, obtaining a value of 93% elution at a temperature of 80°C and a H2SO4 concentration of 0.25 g L-1. The influence of other acids on nickel elution was also studied. The nickel elution rate was significantly influenced by temperature and concentration of H2SO4. Elution kinetics of nickel ions was studied, and the 1-(1-α)1/3=kappt model properly described the kinetics of this reaction. The dependence of nickel elution on the sulfuric acid concentration was of the order of 0.33. Moreover, the intrinsic rate constants were determined and an activation energy value of 54.5 kJ mol-1 was obtained for the temperature range studied. The results indicated that the nickel elution is a process controlled by chemical reactions.

AB - Elution of nickel ions from alginate beads was studied in a temperature range of 2 to 80°C and a sulfuric acid concentration between 0.005 to 2.5 g L-1. The elution mechanism was established by ion exchange between nickel and ions protons, obtaining a value of 93% elution at a temperature of 80°C and a H2SO4 concentration of 0.25 g L-1. The influence of other acids on nickel elution was also studied. The nickel elution rate was significantly influenced by temperature and concentration of H2SO4. Elution kinetics of nickel ions was studied, and the 1-(1-α)1/3=kappt model properly described the kinetics of this reaction. The dependence of nickel elution on the sulfuric acid concentration was of the order of 0.33. Moreover, the intrinsic rate constants were determined and an activation energy value of 54.5 kJ mol-1 was obtained for the temperature range studied. The results indicated that the nickel elution is a process controlled by chemical reactions.

KW - Alginate beads

KW - Elution rate

KW - Intrinsic kinetics

KW - Nickel ions

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U2 - 10.3989/revmetalm.062

DO - 10.3989/revmetalm.062

M3 - Article

AN - SCOPUS:84961845481

SN - 0034-8570

VL - 52

JO - Revista de Metalurgia (Madrid)

JF - Revista de Metalurgia (Madrid)

IS - 1

M1 - e062

ER -

Elución de iones de níquel desde esferas de alginato en un medio ácido

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