A column study of the impact of layering the different Lac Tio mine waste rock lithologies on drainage water quality

2021 ◽  
pp. 106823
Author(s):  
Bissé Poaty ◽  
Benoît Plante ◽  
Bruno Bussière ◽  
Mostafa Benzaazoua ◽  
Martin Thériault
Keyword(s):  
Water Quality ◽  
Mine Waste ◽  
Drainage Water ◽  
Waste Rock ◽  
Column Study ◽  
Mine Waste Rock ◽  
The Impact

scholarly journals Impact of Controlled Drainage and Subirrigation on Water Quality in the Red River Valley

Water ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 308
Author(s):  
Kristen Almen ◽  
Xinhua Jia ◽  
Thomas DeSutter ◽  
Thomas Scherer ◽  
Minglian Lin
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Surface Water Quality ◽  
Drainage Water ◽  
River Valley ◽  
Red River ◽  
Nutrient Loss ◽  
Controlled Drainage ◽  
Red River Valley ◽  
The Impact

The potential impact of controlled drainage (CD), which limits drainage outflow, and subirrigation (SI), which provides supplemental water through drain tile, on surface water quality are not well known in the Red River Valley (RRV). In this study, water samples were collected and analyzed for chemical concentrations from a tile-drained field that also has controlled drainage and subirrigation modes in the RRV of southeastern North Dakota from 2012–2018. A decreasing trend in overall nutrient load loss was observed because of reduced drainage outflow, though some chemical concentrations were found to be above the recommended surface water quality standards in this region. For example, sulfate was recommended to be below 750 mg/L but was reported at a mean value of 1971 mg/L during spring free drainage. The chemical composition of the subirrigation water was shown to have an impact on drainage water and the soil, specifically on salinity-related parameters, and the impact varied between years. This variation largely depended on the amount of subirrigation applied, soil moisture, and soil properties. Overall, the results of this study show the benefits of controlled drainage on nutrient loss reduction from agricultural fields.

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 Revaluing mine waste rock for carbon capture and storage

2010 ◽  
Vol 24 (1) ◽  
pp. 64-79 ◽  
Author(s):  
Michael Hitch ◽  
Sheila M. Ballantyne ◽  
Sarah R. Hindle
Keyword(s):  
Carbon Capture ◽  
Mine Waste ◽  
Carbon Capture And Storage ◽  
Waste Rock ◽  
Mine Waste Rock ◽  
And Storage

Combined DC resistivity and induced polarization (DC-IP) for mapping the internal composition of a mine waste rock pile in Nova Scotia, Canada

2018 ◽  
Vol 150 ◽  
pp. 40-51 ◽  
Author(s):  
Christopher Power ◽  
Panagiotis Tsourlos ◽  
Murugan Ramasamy ◽  
Aristeidis Nivorlis ◽  
Martin Mkandawire
Keyword(s):  
Nova Scotia ◽  
Mine Waste ◽  
Induced Polarization ◽  
Waste Rock ◽  
Dc Resistivity ◽  
Rock Pile ◽  
Waste Rock Pile ◽  
Mine Waste Rock

scholarly journals Platinum Mine Workers’ Exposure to Dust Particles Emitted at Mine Waste Rock Crusher Plants in Limpopo, South Africa

2020 ◽  
Vol 17 (2) ◽  
pp. 655
Author(s):  
Maasago M. Sepadi ◽  
Martha Chadyiwa ◽  
Vusumuzi Nkosi
Keyword(s):  
South Africa ◽  
Mine Waste ◽  
Waste Rock ◽  
Dust Exposure ◽  
Dust Particles ◽  
Hazardous Substance ◽  
Significant Difference ◽  
Mine Waste Rock ◽  
Rock Crusher ◽  
Mine Workers

The South African mining industry is one of the largest producers of platinum (Pt) in the world. Workers in this industry are exposed to significant amounts of dust, and this dust consists of particles sizes that can penetrate deep inside the respiratory region. A cross-sectional study was conducted to evaluate dust exposure risk at two Pt mine waste rock crusher plants (Facility A and B) in Limpopo, South Africa. Workers’ demographic and occupational information was collected through a structured questionnaire, a walk-through observation on facilities’ processes, and static dust sampling for the collection of inhalable and respirable dust particles using the National Institute for Occupational Safety and Health (NIOH) 7602 and the Methods for Determination of Hazardous Substance (MDHS) 14/4 as guidelines. Only 79% of Pt mine workers, used their respiratory protective equipment (RPE), sixty-five percent were exposed to work shifts exceeding the recommended eight hours and 8.8% had been employed for more than ten years. The mean time-weighted average (TWA) dust concentrations between Facility A and B showed a significant difference (p < 0.026). The Pt mine’s inhalable concentrations (range 0.03–2.2 mg/m3) were higher than the respirable concentrations (range 0.02–0.7 mg/m3), however were all below the respective international and local occupational exposure limits (OELs). The Pt mine’s respirable crystalline silica (SiO2) quartz levels were all found below the detectable limit (<0.01 mg/m3). The Pt miners had increased health risks due to accumulated low levels of dust exposure and lack of usage of RPE. It is recommended that an improved dust control program be put in place which includes, but is not limited to, stockpile enclosures, tire stops with water sprays, and education on the importance of RPE usage.

Sign in / Sign up

Export Citation Format

Share Document