Evaluation of geochemical behaviour of flooded cemented paste backfill of sulphide-rich tailings by dynamic-tank leaching test


Yılmaz T., Erçıkdı B. , Deveci H.

INTERNATIONAL JOURNAL OF MINING RECLAMATION AND ENVIRONMENT, vol.35, no.5, pp.336-355, 2021 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 35 Issue: 5
  • Publication Date: 2021
  • Doi Number: 10.1080/17480930.2020.1829778
  • Title of Journal : INTERNATIONAL JOURNAL OF MINING RECLAMATION AND ENVIRONMENT
  • Page Numbers: pp.336-355
  • Keywords: Hazardous heavy metals, alkaline industrial by-products, ground-water quality, STRENGTH, ADMIXTURE, LIMESTONE, BRICKS, WASTE, ASH

Abstract

This research elucidates the geochemical behaviour of cemented paste backfill (CPB) of sulphide-rich tailings (S-rT). The dynamic-tank leaching test was performed on the CPBs for up to 360 days. The CPBs with the alkaline industrial by-products (AIPs) produced relatively lower acidity, Ec and SO(4)(2-)than the Control. The AIPs replacement appeared to considerably mitigate the release of heavy metals (HMs) including As. Only Mo and As in CPBs of AIPs exceeded the limit-values for ground-water. These findings demonstrated that a suitable CPB mixture design to control the release of all HMs in CPB is of practical importance for ground-water quality.