Laboratory and Pilot-Scale Nanofiltration Treatment of Abandoned Mine Drainage for the Recovery of Products Suitable for Industrial Reuse

2017 ◽  
Vol 56 (25) ◽  
pp. 7355-7364 ◽  
Author(s):  
Shardul S. Wadekar ◽  
Tom Hayes ◽  
Omkar R. Lokare ◽  
Devesh Mittal ◽  
Radisav D. Vidic
Keyword(s):  
Mine Drainage ◽  
Pilot Scale ◽  
Abandoned Mine ◽  
Industrial Reuse

Removal of heavy metals in an abandoned mine drainage via ozone oxidation: a pilot-scale operation

2010 ◽  
Vol 62 (9) ◽  
pp. 2115-2120 ◽  
Author(s):  
S. H. Seo ◽  
B. W. Sung ◽  
G. J. Kim ◽  
K. H. Chu ◽  
C. Y. Um ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Mine Drainage ◽  
Pilot Scale ◽  
Operating Conditions ◽  
Abandoned Mine ◽  
Sand Filtration ◽  
Sand Filter ◽  
Ozone Oxidation ◽  
Fe And Mn ◽  
Dissolved Heavy Metals

The objective of this study was to evaluate the ozone oxidation of dissolved heavy metals in an abandoned mine drainage (AMD) by conducting a pilot-scale operation at two different ozone doses of 7.5 and 24.0 g O3/h into an ozone reactor. A portion of the abandoned mine drainage near the Jungam Mine in Samchuck, Korea was pumped into this pilot-scale plant and used as an influent for the ozone oxidation. Some possible precipitates of metal oxides and hydroxides that resulted from the pilot-scale ozone oxidation of the dissolved Fe and Mn ions in the AMD (with a hydraulic retention time of 106 seconds in the ozone reactor) were effectively removed via sand filtration. A six-hour ozone oxidation with an ozone dose of 24.0 g O3/h and subsequent sand filtration, before backwashing the sand filter bed, can meet Korean drinking water quality standards (less than 0.3 mg/L) for Fe and Mn in the sand filter effluent under the operating conditions that were used in this study. The SO4−2 concentrations and alkalinities of the influents were not affected by the ozone oxidation. The pH values of the influents were neutral or slightly alkaline, and after the six-hour oxidation, increased very slightly. These experiment results show that the ozone oxidation of dissolved heavy metals and the subsequent sand filtration of metal precipitates are desirable alternatives to removing heavy metals in an abandoned mine drainage.

FLUME SIMULATIONS TO DETERMINE FE2+ AND FE3+ KINETICS OF THE COLLOIDAL AND DISSOLVED FRACTIONS IN ABANDONED MINE DRAINAGE

2017 ◽  
Author(s):  
William A. Peterson ◽  
◽  
Emma G. Saloky ◽  
Molly M. McGuire ◽  
Ellen K. Herman
Keyword(s):  
Mine Drainage ◽  
Abandoned Mine ◽  
Kinetics Of

scholarly journals PENNSYLVANIA’S ABANDONED MINE LAND (AML) EMERGENCY PROGRAM

2020 ◽  
Vol 9 (4) ◽  
pp. 67-86
Author(s):  
Eric E. Cavazza ◽  
◽  
John J. Stefanko ◽  
Richard L. Beam
Keyword(s):  
Structural Damage ◽  
Large Scale ◽  
Mine Drainage ◽  
Abandoned Mine ◽  
Annual Number ◽  
House Construction ◽  
Mine Fires ◽  
Coal Refuse ◽  
Eastern Pennsylvania ◽  
Engineering Staff

Abstract. The Pennsylvania Department of Environmental Protection’s Bureau of Abandoned Mine Reclamation (BAMR) implements an Abandoned Mine Land (AML) Emergency Program to address high-priority, abandoned mine land (AML) problems that suddenly occur throughout Pennsylvania’s coal fields. BAMR maintains two field offices: one in eastern Pennsylvania (Anthracite Region) in Wilkes-Barre and one in western Pennsylvania (Bituminous Region) in Ebensburg. Both field offices maintain in-house construction crews with significant equipment available to respond to and address many small AML Emergencies (hazards) such as pothole (or cavehole), subsidences, and mine drainage breakouts. For larger AML Emergencies such as subsidence events causing structural damage to homes, businesses, and roads; mine fires; coal refuse fires; landslides; or other large-scale or complex AML problems, projects are completed by outside contractors. Project designs are completed by BAMR engineering staff. The contractors are then hired through solicitation of bids or proposals with very short timeframes between bid issue and bid opening. Since October of 2010, BAMR has addressed nearly 800 AML Emergencies which equates to approximately 80 AML Emergency projects each calendar year. The average construction cost to address those emergencies was just over $3.25 million per year. Due to the increased precipitation over the Commonwealth the last several years, that number has increased to an average of 86 AML Emergency projects over the last five (5) years (2015–2019) with a record number of 127 addressed in calendar year 2018. The average cost to address those AML Emergency projects over that five-year period was $4.66 million per year. This paper will provide some background on Pennsylvania’s AML Emergency Program, some summary statistics including the annual number and types of projects completed including costs, and also highlight through both photos and video links some typical projects recently completed by the program.

Effect of Dissolved CO2 in Acid Mine Drainage on Sludge Composition

2020 ◽  
Author(s):  
Giljae Yim ◽  
Youngwook Cheong ◽  
Joonhak Lee ◽  
Sanghyun Cho ◽  
Wonhyun Ji
Keyword(s):  
Mine Drainage ◽  
Neutralization Test ◽  
Xrd Analysis ◽  
Abandoned Mine ◽  
Raw Water ◽  
High Concentration ◽  
Quality Change ◽  
Water Quality Change ◽  
Slaked Lime ◽  
Mineral Assessment

<p>Among the variables affecting the volume and composition sludge generated in the semi-active mine drainage treatment facility operating in Korea, the effect of CO<sub>2</sub> dissolved in the mine drainage on the sludge composition was studied.</p><p>The water quality change was analyzed by neutralizing 1m<sup>3 </sup>of mine drainage from the Ilkwang abandoned mine. The neutralization with lime slurry resulted in removal of Fe, Al, Cu and SiO<sub>2</sub>, and an increase in Ca content in neutralized water. The dissolved CO<sub>2</sub> in raw water was 56 mg/L but decreased to <1 mg/L after neutralization. The dissolved CO<sub>2</sub> in the mine drainage can be consumed to form calcite or be removed by degassing before neutralization. There is also a possibility that gypsum may be produced depending on pH due to the high concentration of Ca and SO<sub>4</sub> enriched.</p><p>The amount of sludge generated through the neutralization test was insufficient for analysis. Therefore, chemical analysis and mineral assessment were performed on the effluent, sludge and cakes generated in the settling pond in the Ilkwang abandoned mine. XRD analysis showed that calcite (CaCO<sub>3</sub>) and Bassanite (CaSO<sub>4</sub> · H<sub>2</sub>O) were commonly found in red and white sludge. CO<sub>2</sub> in the mine drainage reacted with CaO to affect the sludge composition. As a result of the XRF, white sludge contained 35.57% of CaO, indicating that a large amount of slaked lime was included. Red sludge and cakes had a Fe<sub>2</sub>O<sub>3</sub> content of more than 35%, so iron was the main ingredient. In addition, the CaO content was analyzed as 15.28%, the second major component. As a result of measuring the paste pH of the dehydrated cake, it can be seen that the pH is in the range of 9 to 10 due to CaO. The sludge shows strong alkali characteristics, indicating that slaked lime remains in the sludge. The remaining slaked lime will increase the sludge volume and increase the sludge management costs.</p>

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