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Legacy base metal slags can generate toxic leachates

Adijat T. Awoniran, Annelly Ketheson

2018enslagderelict minesleachabilitymineralogyelemental composition

Abstract

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Slags sourced from a derelict zinc–lead–copper–silver–tungsten mine were examined for their bulk elemental composition and mineralogy. The objective of this study was to assess the leachability of selected elements during a 130-day deionised water extraction conducted under oxic conditions. Methodologically, pH, oxidation–reduction potential, and leachability of sulphur, calcium, iron, copper, zinc, and lead were evaluated. Results indicated that the slags were rich in silicon, iron, copper, zinc, and lead, housed within minerals like quartz, goethite, and augite. Notably, leachates showed an increase in analyte concentration over time, with iron, copper, zinc, and lead exceeding 5 mg l−1 in certain samples. These findings highlight that pyrometallurgical waste should not be deemed environmentally inert, as leachates generated may present significant environmental risks.

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Cite This Work

@article{28698e99-0e59-422d-82f7-736b2b371799,
  title={Legacy base metal slags can generate toxic leachates},
  author={Adijat T. Awoniran and Annelly Ketheson},
  year={2018},
  language={en}
}
TY  - JOUR
TI  - Legacy base metal slags can generate toxic leachates
AU  - Adijat T. Awoniran
AU  - Annelly Ketheson
PY  - 2018
LA  - en
ER  -

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