Use of limekiln dust in the stabilization of heavy metals in Ghanaian gold oxide ore mine tailings.

Publisher: Springer Country of Publication: Netherlands NLM ID: 8508350 Publication Model: Electronic Cited Medium: Internet ISSN: 1573-2959 (Electronic) Linking ISSN: 01676369 NLM ISO Abbreviation: Environ Monit Assess Subsets: MEDLINE

Publication: 1998- : Dordrecht : Springer
Original Publication: Dordrecht, Holland ; Boston : D. Reidel Pub. Co., c1981-

Metals, Heavy* ; Mercury*; Gold ; Ghana ; Cadmium ; Environmental Monitoring ; Dust ; Oxides ; Soil

Remedial action for heavy metal-contaminated soils is imperative for preventing heavy metal leachability and minimizing environmental risks. This study evaluated the use of limekiln dust (LKD) as a heavy metal stabilization agent for Ghanaian gold mine oxide ore tailing material. Heavy metal-laden tailing material (Fe, Ni, Cu, Cd, and Hg) was collected from a tailing dam site in Ghana. Stabilization was done using acid neutralization capacity (ANC) and citric acid test (CAT) while all chemical characterization was done using X-ray fluorescence (XRF) spectroscopy. Various physicochemical parameters including pH, EC, and temperature were also measured. The contaminated soils were amended with LKD in doses of 5, 10, 15, and 20 wt.%. The results revealed that the contaminated soils had concentrations of heavy metals above FAO/WHO stipulated limits of 350, 35, 36, 0.8, and 0.3 mg/kg for Fe, Ni, Cu, Cd, and Hg, respectively. After 28 days of curing, 20 wt.% of LKD was found to be appropriate for the remediation of the mine tailings of all the heavy metals studied except Cd. Ten percent of the LKD was noticed to be enough in remedying soil contaminated with Cd since the Cd's concentration reduced from 9.1 to 0.0 mg/kg with a stabilizing efficiency of 100% and a leaching factor of 0.0. Therefore, remediation of contaminated soils of Fe, Cu, Ni, Cd, and Hg with LKD is safe and environmentally friendly.
(© 2023. The Author(s), under exclusive licence to Springer Nature Switzerland AG.)

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Keywords: Acid neutralization capacity; Citric acid test; Heavy metal stabilization; Limekiln dust; Mining

7440-57-5 (Gold)
00BH33GNGH (Cadmium)
0 (Metals, Heavy)
FXS1BY2PGL (Mercury)
0 (Dust)
0 (Oxides)
0 (Soil)

Date Created: 20230523 Date Completed: 20230525 Latest Revision: 20230525

20231215

10.1007/s10661-023-11306-6

37219632