The impact of physical properties on the leaching of potentially toxic elements from antimony ore processing wastes

Saijun Zhou, Andrew Hursthouse

Research output: Contribution to journalArticle

2 Downloads (Pure)

Abstract

This study reports on the assessment of the impact of antimony mine wastes from Xikuangshan (XKS) Antimony Mine in Lengshuijiang City, Hunan Province. We focus on the leaching of a number of potentially toxic elements (PTEs) from residues from the processing of antimony ore. The PTE content of ore processing waste and solutions generated by leaching experiments were determined for a suite of PTEs associated with the ore mineralization. These were Sb, As, Hg, Pb, Cd and Zn. As anticipated, high concentrations of the PTEs were identified in the waste materials, far exceeding the standard background values for soil in Hunan Province. For Sb and As, values reached >1800 mg·kg -1 and >1200 mg·kg -1, respectively (>600 and >90 times higher than the soil background). The leaching of Sb, As, Hg, Pb, Cd and Zn decreased with an increase in grain size and leachable portions of metal ranged between 0.01% to 1.56% of total PTE content. Leaching tests identified the release of PTEs through three stages: a. alkaline mineral dissolution and H + exchanging with base cation; b. oxidation and acid production from pyrite and other reducing minerals; and c. the adsorption and precipitation of PTEs.

Original languageEnglish
Article number2355
JournalInternational Journal of Environmental Research and Public Health
Volume16
Issue number13
DOIs
Publication statusPublished - 1 Jul 2019

Fingerprint

Antimony
Poisons
Minerals
Soil
Portion Size
Adsorption
Cations
Metals
Acids

Keywords

  • Antimony ore processing wastes
  • Leaching
  • Particle size
  • Potentially toxic elements

Cite this

@article{d0e3684920904bc1a04be3b2779cbe42,
title = "The impact of physical properties on the leaching of potentially toxic elements from antimony ore processing wastes",
abstract = "This study reports on the assessment of the impact of antimony mine wastes from Xikuangshan (XKS) Antimony Mine in Lengshuijiang City, Hunan Province. We focus on the leaching of a number of potentially toxic elements (PTEs) from residues from the processing of antimony ore. The PTE content of ore processing waste and solutions generated by leaching experiments were determined for a suite of PTEs associated with the ore mineralization. These were Sb, As, Hg, Pb, Cd and Zn. As anticipated, high concentrations of the PTEs were identified in the waste materials, far exceeding the standard background values for soil in Hunan Province. For Sb and As, values reached >1800 mg·kg -1 and >1200 mg·kg -1, respectively (>600 and >90 times higher than the soil background). The leaching of Sb, As, Hg, Pb, Cd and Zn decreased with an increase in grain size and leachable portions of metal ranged between 0.01{\%} to 1.56{\%} of total PTE content. Leaching tests identified the release of PTEs through three stages: a. alkaline mineral dissolution and H + exchanging with base cation; b. oxidation and acid production from pyrite and other reducing minerals; and c. the adsorption and precipitation of PTEs.",
keywords = "Antimony ore processing wastes, Leaching, Particle size, Potentially toxic elements",
author = "Saijun Zhou and Andrew Hursthouse",
year = "2019",
month = "7",
day = "1",
doi = "10.3390/ijerph16132355",
language = "English",
volume = "16",
journal = "International Journal of Environmental Research and Public Health",
issn = "1661-7827",
publisher = "Multidisciplinary Digital Publishing Institute",
number = "13",

}

TY - JOUR

T1 - The impact of physical properties on the leaching of potentially toxic elements from antimony ore processing wastes

AU - Zhou, Saijun

AU - Hursthouse, Andrew

PY - 2019/7/1

Y1 - 2019/7/1

N2 - This study reports on the assessment of the impact of antimony mine wastes from Xikuangshan (XKS) Antimony Mine in Lengshuijiang City, Hunan Province. We focus on the leaching of a number of potentially toxic elements (PTEs) from residues from the processing of antimony ore. The PTE content of ore processing waste and solutions generated by leaching experiments were determined for a suite of PTEs associated with the ore mineralization. These were Sb, As, Hg, Pb, Cd and Zn. As anticipated, high concentrations of the PTEs were identified in the waste materials, far exceeding the standard background values for soil in Hunan Province. For Sb and As, values reached >1800 mg·kg -1 and >1200 mg·kg -1, respectively (>600 and >90 times higher than the soil background). The leaching of Sb, As, Hg, Pb, Cd and Zn decreased with an increase in grain size and leachable portions of metal ranged between 0.01% to 1.56% of total PTE content. Leaching tests identified the release of PTEs through three stages: a. alkaline mineral dissolution and H + exchanging with base cation; b. oxidation and acid production from pyrite and other reducing minerals; and c. the adsorption and precipitation of PTEs.

AB - This study reports on the assessment of the impact of antimony mine wastes from Xikuangshan (XKS) Antimony Mine in Lengshuijiang City, Hunan Province. We focus on the leaching of a number of potentially toxic elements (PTEs) from residues from the processing of antimony ore. The PTE content of ore processing waste and solutions generated by leaching experiments were determined for a suite of PTEs associated with the ore mineralization. These were Sb, As, Hg, Pb, Cd and Zn. As anticipated, high concentrations of the PTEs were identified in the waste materials, far exceeding the standard background values for soil in Hunan Province. For Sb and As, values reached >1800 mg·kg -1 and >1200 mg·kg -1, respectively (>600 and >90 times higher than the soil background). The leaching of Sb, As, Hg, Pb, Cd and Zn decreased with an increase in grain size and leachable portions of metal ranged between 0.01% to 1.56% of total PTE content. Leaching tests identified the release of PTEs through three stages: a. alkaline mineral dissolution and H + exchanging with base cation; b. oxidation and acid production from pyrite and other reducing minerals; and c. the adsorption and precipitation of PTEs.

KW - Antimony ore processing wastes

KW - Leaching

KW - Particle size

KW - Potentially toxic elements

U2 - 10.3390/ijerph16132355

DO - 10.3390/ijerph16132355

M3 - Article

VL - 16

JO - International Journal of Environmental Research and Public Health

JF - International Journal of Environmental Research and Public Health

SN - 1661-7827

IS - 13

M1 - 2355

ER -