A waste rock and bioash mixture as a road stabilization product

2015 ◽  
pp. 283-288 ◽  
Author(s):  
M Sarkkinen ◽  
T Luukkonen ◽  
K Kemppainen
Keyword(s):  
Waste Rock

Simulating nitrate release from an unsaturated coal waste rock dump

2021 ◽  
Vol 779 ◽  
pp. 146429
Author(s):  
Mingbin Huang ◽  
S. Lee Barbour ◽  
M. Jim Hendry
Keyword(s):  
Waste Rock ◽  
Coal Waste ◽  
Waste Rock Dump

scholarly journals A Test of Two Methods for Waste Rock Drainage Quality Prediction: Aqua Regia Extraction and Single-addition Net-acid Generation Test Leachate Analysis

2021 ◽  
Author(s):  
Teemu Karlsson ◽  
Lena Alakangas ◽  
Päivi Kauppila ◽  
Marja Liisa Räisänen
Keyword(s):  
Mine Drainage ◽  
Mine Waste ◽  
Extraction Methods ◽  
Drainage Water ◽  
Waste Rock ◽  
Quality Prediction ◽  
Aqua Regia ◽  
Acid Generation ◽  
Leachate Analysis ◽  
Single Addition

AbstractThe mobility of contaminants from mine waste can be assessed using different extraction methods. Aqua regia (AR) extraction is the most commonly used method in Finland. Another method is the analysis of leachate from net acid generation (NAG) tests, which is primarily designed for acid production potential assessment. We investigated the performance of single-addition NAG test leachate analysis and AR extraction in drainage quality prediction, using waste rock and drainage water samples from several Finnish waste rock sites. Our objective was to improve interpretation of the AR and single-addition NAG test leachate analysis results in drainage quality prediction. The AR extraction effectively reflected elements that occurred in elevated concentrations in drainage water, though it over-predicted Al, As, Cd, Co, Cu, and Ni in some circumneutral drainages, and Cr in general. The single-addition NAG test leachate analysis also performed well in assessing the mobility of contaminants including Al and Cr at acid mine drainage sites. As the contaminants tend to precipitate in neutral NAG test solution, the usability of the method in neutral mine drainage cases should be further investigated. Furthermore, the conclusions presented in this study are limited to waste rock samples collected from the surface of piles; future work will examine waste rock history, dump cores, drainage quality changes, etc. in more detail.

scholarly journals Localized Sulfide Oxidation Limited by Oxygen Supply in a Full-Scale Waste-Rock Pile

2018 ◽  
Vol 17 (1) ◽  
pp. 180119 ◽  
Author(s):  
Bas Vriens ◽  
Mélanie St. Arnault ◽  
Laura Laurenzi ◽  
Leslie Smith ◽  
K. Ulrich Mayer ◽  
...  
Keyword(s):  
Oxygen Supply ◽  
Sulfide Oxidation ◽  
Full Scale ◽  
Waste Rock ◽  
Rock Pile ◽  
Waste Rock Pile
Sign in / Sign up

Export Citation Format

Share Document