Carbonation of stainless steel slag in the context of in situ Brownfield remediation

“The main aim of this work was to assess the potential of in situ carbonation as a treatment to modify the
properties of alkaline materials such as industrial soil in terms of leaching behaviour and mineralogy and
to store the CO2 generated by specific treatments applied in the context of Brownfield regeneration. The
process was investigated through lab-scale column carbonation experiments, in which 100% CO2 was fed
through humidified stainless steel slag under ambient temperature and pressure for set reaction times.
The reaction kinetics and the maximum CO2 uptake attained (5.5%), corresponding to a Ca conversion
yield of 15.6%, after 4 h treatment proved slightly lower than those resulting from batch tests carried
out on the same particle size fraction at enhanced operating conditions. The mineralogy of the material
showed to be affected by column carbonation, exhibiting a higher calcite content and the decrease of Ca
hydroxide and silicate phases. As a result of carbonation, the material showed a decrease in pH and Ca
release as well as an increase in Si mobility. Furthermore, a reduction of Cr and Ba leaching, up to 63%
and 96% respectively, was achieved after 2 h of reaction. However, carbonation was observed to lead
to an increased leaching of V and Mo. The effects of carbonation on the leaching behaviour of the material
were also investigated performing pH-dependence leaching tests and the results indicated that in situ
carbonation appears to be a promising treatment to improve the properties of alkaline materials in view
of their reuse on-site.”
Copyright © 2013 Elsevier Ltd. All rights reserved
(Citaat: Capobianco, O., Costa, G., et al. Carbonation of stainless steel slag in the context of in situ Brownfield remediation – Minerals Engineering 59(2014), p.91-100)
(DOI of original article: http://dx.doi.org/10.1016/j.mineng.2013.11.005)

Corrigendum to ‘‘Carbonation of stainless steel slag in the context of
in situ Brownfield remediation’’ [Minerals Eng. 59 (2014) 91–100]
Oriana Capobianco, Giulia Costa, Laurens Thuy, Elisa Magliocco, Niels Hartog, Renato Baciocchi
(http://dx.doi.org/10.1016/j.mineng.2014.05.003)