scholarly journals Ferrite Formation Using Precipitates Neutralized by Calcium Carbonate in the Treatment of Acid Mine Drainage

2005 ◽  
Vol 121 (10/11) ◽  
pp. 521-531
Author(s):  
Haruka MARUYAMA ◽  
Toshifumi IGARASHI ◽  
Kuniomi ASAKURA ◽  
Hiroko MIYAMAE ◽  
Nobuyoshi IYATOMI ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Acid Mine Drainage ◽  
Mine Drainage ◽  
Ferrite Formation ◽  
Acid Mine

Mathematical model for calcium carbonate acid mine drainage reaction: a multiple time scale approach

2013 ◽  
Vol 24 (4) ◽  
pp. 503-526
Author(s):  
Lorenzo Fusi ◽  
Alessandro Monti ◽  
Angiolo Farina ◽  
Mario Primicerio
Keyword(s):  
Mathematical Model ◽  
Calcium Carbonate ◽  
Acid Mine Drainage ◽  
Time Scale ◽  
Mine Drainage ◽  
Multiple Time ◽  
Multiple Time Scale ◽  
Acid Mine

scholarly journals Ferrite Formation Using Precipitates Neutralized by Magnesium Oxide in the Treatment of Acid Mine Drainage

2004 ◽  
Vol 120 (10/11) ◽  
pp. 577-583 ◽  
Author(s):  
Tetsuya YOSHIDA ◽  
Toshifumi IGARASHI ◽  
Kuniomi ASAKURA ◽  
Hiroko MIYAMAE ◽  
Nobuyoshi IYATOMI ◽  
...  
Keyword(s):  
Acid Mine Drainage ◽  
Magnesium Oxide ◽  
Mine Drainage ◽  
Ferrite Formation ◽  
Acid Mine

Advances in Seeded Ambient Temperature Ferrite Formation for Treatment of Acid Mine Drainage

2005 ◽  
Vol 39 (19) ◽  
pp. 7678-7683 ◽  
Author(s):  
B. E. Morgan ◽  
O. Lahav ◽  
R. E. Loewenthal
Keyword(s):  
Acid Mine Drainage ◽  
Ambient Temperature ◽  
Mine Drainage ◽  
Ferrite Formation ◽  
Acid Mine

Recovery of calcium carbonate from waste gypsum and utilization for remediation of acid mine drainage from coal mines

2012 ◽  
Vol 66 (6) ◽  
pp. 1296-1300 ◽  
Author(s):  
J. Mulopo ◽  
V. Radebe
Keyword(s):  
Calcium Carbonate ◽  
Acid Mine Drainage ◽  
Sodium Carbonate ◽  
Mine Drainage ◽  
Coal Mines ◽  
Molar Ratio ◽  
Slurry Concentration ◽  
Acid Mine ◽  
Waste Gypsum ◽  
Pre Treatment

The recovery of calcium carbonate from waste gypsum (a waste product of the reverse osmosis (RO) desalination process) was tested using sodium carbonate. Batch recovery of calcium carbonate from waste gypsum slurries by reacting with sodium carbonate under ambient conditions was used to assess the technical feasibility of CaCO3 recovery and its use for pre-treatment of acid mine drainage (AMD) from coal mines. The effect of key process parameters, such as the slurry concentration (%) and the molar ratio of sodium carbonate to gypsum were considered. It was observed that batch waste gypsum conversion significantly increased with decrease in the slurry concentration or increase in the molar ratio of sodium carbonate to gypsum. The CaCO3 recovered from the bench-scale batch reactor demonstrated effective neutralization ability during AMD pre-treatment compared with commercial laboratory grade CaCO3.

Recovery of calcium carbonate from steelmaking slag and utilization for acid mine drainage pre-treatment

2012 ◽  
Vol 65 (12) ◽  
pp. 2236-2241 ◽  
Author(s):  
J. Mulopo ◽  
M. Mashego ◽  
J. N. Zvimba
Keyword(s):  
Calcium Carbonate ◽  
Hydrochloric Acid ◽  
Acid Mine Drainage ◽  
Flow Rate ◽  
Mine Drainage ◽  
Steelmaking Slag ◽  
Carbonation Reaction ◽  
Acid Mine ◽  
Pre Treatment ◽  
Co2 Flow

The conversion of steelmaking slag (a waste product of the steelmaking process) to calcium carbonate (CaCO3) was tested using hydrochloric acid, ammonium hydroxide and carbon dioxide via a pH-swing process. Batch reactors were used to assess the technical feasibility of calcium carbonate recovery and its use for pre-treatment of acid mine drainage (AMD) from coal mines. The effects of key process parameters, such as the amount of acid (HCl/calcium molar ratio), the pH and the CO2 flow rate were considered. It was observed that calcium extraction from steelmaking slag significantly increased with an increase in the amount of hydrochloric acid. The CO2 flow rate also had a positive effect on the carbonation reaction rate but did not affect the morphology of the calcium carbonate produced for values less than 2 L/min. The CaCO3 recovered from the bench scale batch reactor demonstrated effective neutralization ability during AMD pre-treatment compared with the commercial laboratory grade CaCO3.

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