Leakage Mechanism of the Wastewater Dam in Metal Mine and its Anti-Seepage Technology

2014 ◽  
Vol 641-642 ◽  
pp. 416-419
Author(s):  
Jiang Qian Zhao ◽  
Hai Yan Ju ◽  
Peng Zhang ◽  
Shao Lin Liu
Keyword(s):  
Acid Mine Drainage ◽  
Mine Drainage ◽  
Coal Fly Ash ◽  
Water Environment ◽  
Physical And Mechanical Properties ◽  
Scientific Data ◽  
Acid Mine ◽  
Metal Mine ◽  
Leakage Mechanism ◽  
Technical Basis

The acid mine drainage has the widest pollution range and biggest harm degree, which forms the potential corrosion hazards to sewage dams in mental mine. Based on the investigation and analysis of the acid mine drainage, the evolution law influence of physical and mechanical properties and leakage mechanism of sewage dam is revealed under the action of the acid mine drainage. In order to prolong its service life and insure the safe operation of the construction engineering, the program of concrete anti-seepage wall with coal fly ash is adopted, which can improve the impermeability and structure of concrete, enhancing the anti-seepage wall durability under acidic environment, providing the basis of scientific data and technical basis for acid mine water environment of basic construction.

scholarly journals Treatment of acid mine drainage with coal fly ash in a jet loop reactor pilot plant

2020 ◽  
Vol 159 ◽  
pp. 106611 ◽  
Author(s):  
Rosicky Methode Kalombe ◽  
Tunde Victor Ojumu ◽  
Vinny Ndjate Katambwe ◽  
Michael Nzadi ◽  
Denzil Bent ◽  
...  
Keyword(s):  
Fly Ash ◽  
Acid Mine Drainage ◽  
Pilot Plant ◽  
Mine Drainage ◽  
Coal Fly Ash ◽  
Loop Reactor ◽  
Acid Mine

scholarly journals Clean Technology for the Treatment and Modelling of Acid Mine Drainage Effluent

2020 ◽  
Vol Special Issue (1) ◽  
Keyword(s):  
Acid Mine Drainage ◽  
Mine Drainage ◽  
Low Cost ◽  
Water Environment ◽  
Surrounding Water ◽  
Acid Mine ◽  
Adsorption Technology ◽  
Process Factors ◽  
Experimental Trials ◽  
Metal Conjugates

Acid Mine Drainage (AMD) exists as a phenomenon that involves the release of acidic water and metal conjugates, in and around mines, degrading the surrounding water environment. A real-time mining effluent is treated using low-cost adsorption technology using Combined Vegetable Waste Carbon (CVWC) as sorbent. Batch sorption was reviewed to know the effect of process factors on the removal of Cadmium (Cd), Zinc (Zn), and Iron (Fe). A two-level CCD (Central Composite Design) with three factors was adopted in the optimization of process factors. Also, the same factors were considered to review the ANNs (Artificial Neural Networks), model. A comparative statistical analysis was performed for the experimental data based on RMSE and R2 values in both RSM (Response Surface Methodology) and ANNs models. This study revealed that the ANNs model was well fit compared to RSM and this would probably reduce the experimental trials thereby reducing cumbersome calculations.

scholarly journals Effectiveness of Fly Ash and Red Mud as Strategies for Sustainable Acid Mine Drainage Management

Minerals ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 707
Author(s):  
Viktoria Keller ◽  
Srećko Stopić ◽  
Buhle Xakalashe ◽  
Yiqian Ma ◽  
Sehliselo Ndlovu ◽  
...  
Keyword(s):  
Fly Ash ◽  
Acid Mine Drainage ◽  
Red Mud ◽  
Mine Drainage ◽  
Ph Value ◽  
Coal Fly Ash ◽  
Precipitation Process ◽  
Acid Mine ◽  
Initial Ph ◽  
Acidic Mine Water

Acid mine drainage (AMD), red mud (RM) and coal fly ash (CFA) are potential high environmental pollution problems due to their acidity, toxic metals and sulphate contents. Treatment of acidic mine water requires the generation of enough alkalinity to neutralize the excess acidity. Therefore, red mud types from Germany and Greece were chosen for the neutralization of AMD from South Africa, where this problem is notorious. Because of the high alkalinity, German red mud is the most promising precipitation agent achieving the highest pH-values. CFA is less efficient for a neutralization and precipitation process. An increase in temperature increases the adsorption kinetics. The maximum pH-value of 6.0 can be reached by the addition of 100 g German red mud at 20 °C to AMD-water with an initial pH value of 1.9. German red mud removes 99% of the aluminium as aluminium hydroxide at pH 5.0. The rare earth elements (yttrium and cerium) are adsorbed by Greek red mud with an efficiency of 50% and 80% at 60 °C in 5 min, respectively.

Acid Mine Drainage (AMD) and Acid Sulphate Soil monitoring using mineral and image spectroscopy: hyperspectral and multispectral approaches

2021 ◽  
Author(s):  
Veronika Kopackova-Strnadova
Keyword(s):  
Acid Mine Drainage ◽  
Mine Drainage ◽  
Imaging Spectroscopy ◽  
Water Environment ◽  
Mineral Acid ◽  
Oxidation Products ◽  
Systematic Analysis ◽  
Acid Sulphate ◽  
Acid Mine ◽  
Acid Sulphate Soils

<p>Mining generates a number of significant environmental impacts, such as increased acidity of the soil/water environment, called mineral Acid Mine Drainage (AMD) being produced when sulphide-bearing material is exposed to oxygen and water.  Similar problem represent acid sulphate soils which are naturally occurring soils containing iron sulphide minerals (predominantly pyrite) or their oxidation products. Once these soils are drained, excavated or exposed to air by a lowering of the water table, the sulphides react with oxygen to form sulfuric acid. For both AMD and acid sulphate soils, there is a lack of historical and update records and, consequently, there is a need for new monitoring techniques allowing systematic analysis. A systematic study on how to map mineral patterns that characterize these acid environments using proximal remote sensing and imaging spectroscopy is presented. Furthermore, the upscaling to the spectral and spatial resolution of the satellite data such as WorldView2/3 and Sentinel-2 is discussed as well as an issue of transferability of the developed methods between the test sites which are characterized by different geographical conditions and environments.</p>

Adsorption of Iron(II) from Acid Mine Drainage Contaminated Groundwater Using Coal Fly Ash, Coal Bottom Ash, and Bentonite Clay

2016 ◽  
Vol 227 (3) ◽  
Author(s):  
Emelda Obianuju Orakwue ◽  
Varinporn Asokbunyarat ◽  
Eldon R. Rene ◽  
Piet N. L. Lens ◽  
Ajit Annachhatre
Keyword(s):  
Fly Ash ◽  
Acid Mine Drainage ◽  
Mine Drainage ◽  
Coal Fly Ash ◽  
Bottom Ash ◽  
Bentonite Clay ◽  
Contaminated Groundwater ◽  
Coal Bottom Ash ◽  
Acid Mine

scholarly journals Interactive Relationship between Cementitious Materials and Acid Mine Drainage: Their Effects on Chromium Cr(VI) Removal

Minerals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 932
Author(s):  
Ayanda N. Shabalala ◽  
Moses Basitere
Keyword(s):  
Acid Mine Drainage ◽  
Mine Drainage ◽  
Coal Fly Ash ◽  
Freundlich Isotherm ◽  
Cementitious Materials ◽  
Acid Mine ◽  
Granulated Blast Furnace Slag ◽  
Interactive Relationship ◽  
Partial Cement Replacement ◽  
Furnace Slag

Elevated hexavalent chromium (Cr(VI)) levels in pervious concrete may undermine its successful application in water treatment. Portland cement CEM I 52.5R (CEM I), coal fly ash (FA), natural zeolite and ground granulated blast-furnace slag (GGBS) were evaluated as adsorbents for removal of Cr(VI) from acid mine drainage (AMD). Adsorption experiments were conducted at dosages of 6, 10, 30 and 60 g of adsorbent in 200 mL of AMD, while the mixing contact time was varied from 15 to 300 min. It was found that the use of CEM1 and FA adsorbents strongly increased the Cr(VI) concentration in AMD. Conversely, zeolite and GGBS removed up to 76% and 100% of Cr(VI) from AMD, respectively, upon their use at dosages of at least 10 g of the adsorbent. Freundlich isotherm was found better fitted with a high correlation coefficient (R2 = 0.998 for zeolite and 0.973 for GGBS) than to the Langmuir model (R2 = 0.965 for zeolite and 0.955 for GGBS). Adsorption and ion exchange seem to be active mechanisms for the Cr(VI) removal. These results suggest that zeolite and GGBS can be considered as partial cement replacement materials for effective reduction or removal of Cr(VI) from the treated water.

Sign in / Sign up

Export Citation Format

Share Document