Steel slag as a low-cost sorbent for metal removal in the presence of chelating agents

Eveliina Repo; Jolanta K. Warchoł; Lena Johansson Westholm; Mika Sillanpää

doi:10.1016/j.jiec.2014.12.025

Steel slag as a low-cost sorbent for metal removal in the presence of chelating agents

Eveliina Repo, Jolanta K. Warchoł, Lena Johansson Westholm, Mika Sillanpää

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

42 Citations (Scopus)

Abstract

Industrial byproduct, steel slag was used as a low-cost sorbent for the removal of Co(II), Ni(II), Cd(II), and Pb(II) from aqueous solutions containing chelating agents; EDTA, citrate, and oxalate. Equilibrium and kinetic studies were conducted. Clear dependency between speciation of metals and their sorption behavior was observed. Precipitation and adsorption were suggested as main mechanisms. Diffusion played an important role in the kinetics of metal removal. Notable leaching of elements was observed when steel slag was in contact with the solutions under study. Modification with chitosan was successfully used to prevent leaching and improve the sorption capacity of steel slag.

Original language	English
Pages (from-to)	115-125
Number of pages	11
Journal	Journal of Industrial and Engineering Chemistry
Volume	27
DOIs	https://doi.org/10.1016/j.jiec.2014.12.025
Publication status	Published - 25 Jul 2015
Externally published	Yes

Keywords

Adsorption
Byproduct slag
EDTA
Low-cost sorbent
Metal chelates
Water treatment

ASJC Scopus subject areas

General Chemical Engineering

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10.1016/j.jiec.2014.12.025

Cite this

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title = "Steel slag as a low-cost sorbent for metal removal in the presence of chelating agents",

abstract = "Industrial byproduct, steel slag was used as a low-cost sorbent for the removal of Co(II), Ni(II), Cd(II), and Pb(II) from aqueous solutions containing chelating agents; EDTA, citrate, and oxalate. Equilibrium and kinetic studies were conducted. Clear dependency between speciation of metals and their sorption behavior was observed. Precipitation and adsorption were suggested as main mechanisms. Diffusion played an important role in the kinetics of metal removal. Notable leaching of elements was observed when steel slag was in contact with the solutions under study. Modification with chitosan was successfully used to prevent leaching and improve the sorption capacity of steel slag.",

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AU - Repo, Eveliina

AU - Warchoł, Jolanta K.

AU - Westholm, Lena Johansson

AU - Sillanpää, Mika

PY - 2015/7/25

Y1 - 2015/7/25

N2 - Industrial byproduct, steel slag was used as a low-cost sorbent for the removal of Co(II), Ni(II), Cd(II), and Pb(II) from aqueous solutions containing chelating agents; EDTA, citrate, and oxalate. Equilibrium and kinetic studies were conducted. Clear dependency between speciation of metals and their sorption behavior was observed. Precipitation and adsorption were suggested as main mechanisms. Diffusion played an important role in the kinetics of metal removal. Notable leaching of elements was observed when steel slag was in contact with the solutions under study. Modification with chitosan was successfully used to prevent leaching and improve the sorption capacity of steel slag.

AB - Industrial byproduct, steel slag was used as a low-cost sorbent for the removal of Co(II), Ni(II), Cd(II), and Pb(II) from aqueous solutions containing chelating agents; EDTA, citrate, and oxalate. Equilibrium and kinetic studies were conducted. Clear dependency between speciation of metals and their sorption behavior was observed. Precipitation and adsorption were suggested as main mechanisms. Diffusion played an important role in the kinetics of metal removal. Notable leaching of elements was observed when steel slag was in contact with the solutions under study. Modification with chitosan was successfully used to prevent leaching and improve the sorption capacity of steel slag.

KW - Adsorption

KW - Byproduct slag

KW - EDTA

KW - Low-cost sorbent

KW - Metal chelates

KW - Water treatment

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DO - 10.1016/j.jiec.2014.12.025

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VL - 27

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JO - Journal of Industrial and Engineering Chemistry

JF - Journal of Industrial and Engineering Chemistry

ER -

Steel slag as a low-cost sorbent for metal removal in the presence of chelating agents

Abstract

Keywords

ASJC Scopus subject areas

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