Removal of Trace Metals from Acid Mine Drainage Using a Sequential Combination of Coal Ash-Based Adsorbents and Phytoremediation by Bunchgrass (Vetiver [Vetiveria zizanioides L])

2017 ◽  
Vol 36 (4) ◽  
pp. 520-531 ◽  
Author(s):  
Willis Gwenzi ◽  
Colleta C. Mushaike ◽  
Nhamo Chaukura ◽  
Tavengwa Bunhu
Keyword(s):  
Trace Metals ◽  
Acid Mine Drainage ◽  
Mine Drainage ◽  
Coal Ash ◽  
Vetiveria Zizanioides ◽  
Acid Mine ◽  
Sequential Combination

Transport and sediment–water partitioning of trace metals in acid mine drainage: an example from the abandoned Kwangyang Au–Ag mine area, South Korea

2005 ◽  
Vol 48 (4-5) ◽  
pp. 437-449 ◽  
Author(s):  
Hun-Bok Jung ◽  
Seong-Taek Yun ◽  
Bernhard Mayer ◽  
Soon-Oh Kim ◽  
Seong-Sook Park ◽  
...  
Keyword(s):  
Trace Metals ◽  
Acid Mine Drainage ◽  
South Korea ◽  
Mine Drainage ◽  
Mine Area ◽  
Acid Mine ◽  
Water Partitioning

scholarly journals The Treatment of Acid Mine Drainage Using Vertically Flowing Wetland: Insights into the Fate of Chemical Species

Minerals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 477
Author(s):  
Nguegang Beauclair ◽  
Vhahangwele Masindi ◽  
Titus Alfred Makudali Msagati ◽  
Tekere Memory
Keyword(s):  
Acid Mine Drainage ◽  
Mine Drainage ◽  
Chemical Species ◽  
Abandoned Mines ◽  
Vetiveria Zizanioides ◽  
Redox Equilibrium ◽  
Geochemical Model ◽  
C Language ◽  
Acid Mine ◽  
Eds Analysis

In this study, the treatment of acid mine drainage (AMD) using vertically flowing wetland was explored. The wetland was enriched with Vetiveria zizanioides as a decontaminating media and soil as the substrate. Water was percolated through the substrate and the throughput samples were collected and characterized every five days for a period of 30 days. The obtained results revealed a tolerant index of 1.03 for Vetiveria zizanioides, and a net reduction of metals and sulfate. The removal efficacy of chemical species was observed to obey the following order: Fe (71.25%) > Zn (70.40%) > Mn (62%) > Al (56.68%)> SO42− (55.18%) > Ni (35%) > Cu (18.83%). The removal of chemical species was further aided by the used substrate, and this could be attributed to the accumulation of chemical species on the soil through precipitation, adsorption, and phyto-retention. As such, it could be deduced that the substrate plays a significant role in the removal of metals, while the grass and external factors accounted for the rest of the chemical species attenuation. The translocation assessment revealed that the distribution of chemical species was observed to be predominant in the roots, except manganese, which was transferred in the shoot (67%). The XRF, XRD, FTIR, and SEM-EDS analysis revealed the presence of AMD chemical species in the substrate and the grass components, hence confirming that the plants are playing a huge role in the removal of contaminants from AMD. The PH REdox EQuilibrium (in C language) (PHREEQC) geochemical model confirm that metals existed as di-and-trivalent complexes in AMD. Lastly, available metals were precipitated as metals hydroxides and oxy-hydrosulfates by the substrate. In light of the obtained results, vertically flowing wetland could be used for the passive treatment of AMD, and it will play a huge role in active and abandoned mines. However, prolonged assessment should be undertaken to understand its performance over a notable period of time.

Pollution Control of Acid Mine Drainage at Matsuo Sulphur-pyrite Mine

1984 ◽  
Vol 100 (1160) ◽  
pp. 1031-1038
Author(s):  
Yasuo KONNO ◽  
Hajime IKEDA ◽  
Takeshi SAKATA
Keyword(s):  
Acid Mine Drainage ◽  
Pollution Control ◽  
Mine Drainage ◽  
Acid Mine
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