scholarly journals Nickel and Zinc Removal from Acid Mine Drainage: Roles of Sludge Surface Area and Neutralising Agents

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
William E. Olds ◽  
Daniel C. W. Tsang ◽  
Paul A. Weber ◽  
Chris G. Weisener
Keyword(s):  
Acid Mine Drainage ◽  
Surface Area ◽  
Mine Drainage ◽  
Bet Surface Area ◽  
Acid Mine ◽  
Zinc Removal ◽  
Zn Concentration ◽  
Order Of Magnitude ◽  
Selection Of ◽  
Effect Of Surface

During acid mine drainage (AMD) treatment by alkaline reagent neutralisation, Ni and Zn are partially removed via sorption to Fe and Al hydroxide precipitates. This research evaluated the effect of surface area of precipitates, formed by neutralisation of AMD using three alkalinity reagents (NaOH, Ca(OH)2, and CaCO3), on the sorption of Ni and Zn. The BET surface area of the precipitates formed by neutralisation of AMD with NaOH (173.7 m2 g−1) and Ca(OH)2 (168.2 m2 g−1) was an order of magnitude greater than that produced by CaCO3 neutralisation (16.7 m2 g−1). At pH 6.5, the residual Ni concentration was 0.32 and 0.41 mg L−1 for NaOH and Ca(OH)2 neutralised AMD, respectively, resulting in up to 60% lower Ni concentrations than achieved by CaCO3 neutralisation which had no effect on Ni removal. The residual Zn concentration was even more dependent on precipitate surface area for NaOH and Ca(OH)2 neutralised AMD (0.33 and 1.02 mg L−1), which was up to 85% lower than the CaCO3 neutralised AMD (2.20 mg L−1). These results suggest that the surface area of precipitated flocs and the selection of neutralising reagent critically affect the sorption of Ni and Zn during AMD neutralisation.

scholarly journals Selection of organic materials potentially used to enhance bioremediation of acid mine drainage

2021 ◽  
Vol 8 (3) ◽  
pp. 2779-2789
Author(s):  
Fitri Arum Sekarjannah ◽  
M Mansur ◽  
Zaenal Abidin
Keyword(s):  
Acid Mine Drainage ◽  
Active Treatment ◽  
Organic Materials ◽  
Mine Drainage ◽  
Passive Treatment ◽  
Growth Media ◽  
Acid Mine ◽  
Wetland Treatment ◽  
Wetland System ◽  
Selection Of

Acid mine drainage (AMD), produced when sulfide minerals are subjected to oxygen and water, is one of the major issues in mining industries. Without proper management, AMD's release to the environment would cause seriously prolonged environmental and health issues, such as increases soil acidity and reduces water quality due to extremely low pH, high sulphate concentration, and heavy metal solubility. AMD treatments are divided into two categories, i.e., active treatment, conducted by applying a chemical to the AMD to neutralize pH and precipitate heavy metals; and passive treatment, which relies on biological and biochemical processes. The active treatment may provide an immediate effect, but costly and yet sustainable; meanwhile, passive treatment takes time to establish and to generate an effect, but it is more economical, sustainable, and environmentally friendly. The wetland system is an example of passive treatment. Therefore, this review focuses on passive treatments, especially the selection of organic materials used in constructed AMD wetland treatment. Organic materials play a central role in the wetland system, i.e., to chelate metal ions, remove sulphate from the solution, increase pH, and growth media for microbes, especially sulphate reducing bacteria (SRB) and plants are grown in the system. Overall, organic materials determine the effectiveness of the wetland system to neutralize AMD passively and sustainably.

Selection of reactive mixture for biochemical passive treatment of acid mine drainage

2016 ◽  
Vol 75 (7) ◽  
Author(s):  
Yaneth Vasquez ◽  
María C. Escobar ◽  
Carmen M. Neculita ◽  
Ziv Arbeli ◽  
Fabio Roldan
Keyword(s):  
Acid Mine Drainage ◽  
Mine Drainage ◽  
Passive Treatment ◽  
Acid Mine ◽  
Reactive Mixture ◽  
Selection Of

Kinetic approach for the appropriate selection of indigenous limestones for acid mine drainage treatment with passive systems

2019 ◽  
Vol 677 ◽  
pp. 404-417 ◽  
Author(s):  
Israel Labastida ◽  
M. Aurora Armienta ◽  
René H. Lara ◽  
Roberto Briones ◽  
Ignacio González ◽  
...  
Keyword(s):  
Acid Mine Drainage ◽  
Mine Drainage ◽  
Kinetic Approach ◽  
Passive Systems ◽  
Acid Mine ◽  
Acid Mine Drainage Treatment ◽  
Selection Of

Selection of a Microbial Community in the Course of Formation of Acid Mine Drainage

Microbiology ◽  
2019 ◽  
Vol 88 (3) ◽  
pp. 292-299 ◽  
Author(s):  
V. V. Kadnikov ◽  
E. V. Gruzdev ◽  
D. A. Ivasenko ◽  
A. V. Beletsky ◽  
A. V. Mardanov ◽  
...  
Keyword(s):  
Microbial Community ◽  
Acid Mine Drainage ◽  
Mine Drainage ◽  
Acid Mine ◽  
Selection Of

scholarly journals Adsorption of Iron (Fe) Heavy Metal in Acid Mine Drainage from Coal Mining

2021 ◽  
Vol 1 (1) ◽  
pp. 500-509
Author(s):  
Edy Nursanto ◽  
Mycelia Pradise
Keyword(s):  
Activated Carbon ◽  
Acid Mine Drainage ◽  
Surface Area ◽  
Contact Time ◽  
Mine Drainage ◽  
Quality Standard ◽  
Acid Mine ◽  
Batch System ◽  
Experimental Approaches ◽  
Time Variations

Adsorption is one of effective method to overcome acid mine drainage issue because of its economy and abundant availability of adsorbents. The research aimed to analyze the adsorption effectiveness and capacity of composite as the iron adsorbent in acid mine drainage. Composite consists of claystone from coal overburden, zeolite, and activated carbon from coconut shell. This study used experimental approaches in laboratory. Types of mineral contained in adsorbent materials (claystone, zeolite, and activated carbon) were: kaolinite, mordenite, and cristobalite. Composites were constructed with the following ratios: 50:25:25, 25:25:50, and 25:50:25 (Claystone[C] : Zeolite[Z] : Activated carbon[A]). The composite with a ratio of 25:25:50 had the greatest surface area of 62.44 m2/g, according to the results of the surface area analyzer test. Adsorption was performed in a batch system with a hot plate stirrer and composite mass of 2.5, 5, and 7.5 grams, for contact time variations of 30, 60, 90, 120, and 150 minutes. The adsorption test revealed that the composite was successful in increasing the pH of acid mine drainage to neutral (7.0) and lowering the Fe concentration to meet the quality standard. The best effectiveness of iron lowering was 99,35% with composite mass of 5 grams. However, the 2.5 grams composite mass is more efficient in terms of efficiency because it can lower the Fe concentration to 0.1484 mg/l with only 30 minutes contact time, ensuring that the Fe concentration fulfills the quality standard. The composite with a mass of 2.5 grams has the best adsorption capacity (1,286 mg/g).

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