Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 339, Issue -, Pages 292-300Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2017.05.054
Keywords
Chemical attenuation; Seepage; Leachate; Mine discharge; Abandoned mine
Categories
Funding
- Korea Ministry of Environment (MOE) [2016001970003]
- Korea University
- Korea Environmental Industry & Technology Institute (KEITI) [ARQ201606004002] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Ask authors/readers for more resources
Soil attenuation of off-site leaching potential of metallic elements at the two abandoned mine sites was investigated using batch sorption and layered column studies. In batch study, the leachate concentration specific sorption (K-d(*)) by downgradient clean soils was in the order of Pb > Cu > Cd > Zn > As for DY site and Pb > As > Cu > Cd > Zn for BS site. In the layered (mine + clean) soil column, element elution was significantly reduced (e.g., no initial flush, retarded peak arrival, and lower peak concentration) while sulfate elution can be an indicator of the dissolution of sulfur-bearing minerals in mine soils. The greatest reduction was observed for Pb and Cu while the lowest was for Cd (2-19%) and Zn (6-51%), consistent with the batch data. Both the reduced elution at slow seepage and concentration drop after flow interruption support the time-limited propensity. In column segments, the sorptive elements (Cu, Pb, and As) were dominantly found in the inlet while less sorptive ones (Zn and Cd) in the outlet. Both batch and column data suggest that the element leaching with mine leachate movement can be greatly attenuated by the interactions with the surrounding downgradient soil during the seepage process. (C) 2017 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available