Geochemical fractionation and mineralogy of metal(loid)s in abandoned mine soils: Insights into arsenic behaviour and implications to remediation

[Display omitted] •A comprehensive investigation of As distribution was conducted in soils from abandoned mine sites.•Particle size distribution of trace elements in mine site soil was not homogeneous.•Both fine and coarse particle fractions have elevated levels of As, Sb, Pb and Zn.•XRD, SEM and TE...

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Bibliographic Details
Published in:Journal of hazardous materials 2020-11, Vol.399, p.123029-123029, Article 123029
Main Authors: Fazle Bari, A.S.M., Lamb, Dane, Choppala, Girish, Bolan, Nanthi, Seshadri, Balaji, Rahman, Md. Aminur, Rahman, Mohammad Mahmudur
Format: Article
Language:English
Subjects:
Arsenic
Mineralogy
Particle fraction size
Sequential extraction
Trace elements
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Summary:[Display omitted] •A comprehensive investigation of As distribution was conducted in soils from abandoned mine sites.•Particle size distribution of trace elements in mine site soil was not homogeneous.•Both fine and coarse particle fractions have elevated levels of As, Sb, Pb and Zn.•XRD, SEM and TEM analyses show tooeleite and scorodite are the predominant As minerals in mine soils.•Arsenic distribution in mine soils is strongly associated with crystalline and amorphous Fe phases. Trace element contamination from abandoned mine sites is a major threat to the environment. The distribution of trace elements in various particle size fractions of soils from abandoned mine sites plays a critical role in designing remediation approaches. This study investigated the geochemical distribution of trace element enrichment and mineralogical composition in various particle size fractions from contrasting abandoned mine sites (Webbs Consols, Halls Peak and Mole River, Australia). Results revealed that arsenic and other element concentrations increased with decreasing particle size for samples from Webbs Consols and Halls Peak. The highest arsenic (3.05%), lead (3.23%) and zinc (1110 mg/kg) were found in the finest fraction (
ISSN:0304-3894
1873-3336
DOI:10.1016/j.jhazmat.2020.123029