Sulfate-reducing bacterial community shifts in response to acid mine drainage in the sediment of the Hengshi watershed, South China

A cost-effective system for acid mine drainage removal was developed with the key role of alkaline H2O2 modified corncob and sulfate reducing bacteria.

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Distribution and mobilization of heavy metals at an acid mine drainage affected region in South China, a post-remediation study

The Science of The Total Environment ◽

10.1016/j.scitotenv.2020.138122 ◽

2020 ◽

Vol 724 ◽

pp. 138122 ◽

Cited By ~ 7

Author(s):

Chen Luo ◽

Joyanto Routh ◽

Mårten Dario ◽

Soumyajit Sarkar ◽

Lezhang Wei ◽

...

Keyword(s):

Heavy Metals ◽

Acid Mine Drainage ◽

South China ◽

Mine Drainage ◽

Acid Mine

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Effect of COD/SO42- Supply Ratio Variations of Sulfate-Reducing Bacteria of Sulphood Raise in Acid Mine Drainage

E3S Web of Conferences ◽

10.1051/e3sconf/20187305009 ◽

2018 ◽

Vol 73 ◽

pp. 05009

Author(s):

Hardyanti Nurandani ◽

Utomo Sudarno ◽

Oktaviana Angelica ◽

Serafina Katrin ◽

Junaidi Junaidi

Keyword(s):

Acid Mine Drainage ◽

Sulphur Dioxide ◽

Mine Drainage ◽

Removal Rate ◽

Batch Reactor ◽

Septic Tank ◽

Mining Activities ◽

Sulfate Reducing ◽

Acid Mine ◽

Sulfate Removal

Sulphur dioxide gas is one of most contaminating gas in the air. Sulphur gas can be produced by mining activities. Sulphur gas will be harmful if bond with CO2 to form as Sulphur Dioxide. To reduce the Sulphur Dioxide gas concentration we must inhibite the sulphur gas formation from mining activities. The inhibition of sulphur gas could be done by reduce the sulphate concentration in acid mine drainage. One of important factor that influencing the reduce of sulphate is COD/SO42- ratio. The effect of COD/SO42- ratio on bacterial growth and sulfate removal process can be investigated with anaerobic batch reactor. The laundry septic tank sediments were inoculated on an anaerobic batch reactor which were contacted with artificial coal acid mine water wastes with 1000 sulfate concentrations and 2000 mg SO42- /L. In an anaerobic batch reactor there are five reactors with variations of COD / SO42-1.0, 1.5, 2.0, 4.0, and 8.0 ratios. Efficiency ratio and the best sulfate removal rate is in reactor ratio 2.0 with value efficiency of 46.58% and a reduction rate of 29.128 mg / L.day in an anaerobic batch reactor. The efficiency of the removal rate decreased when the COD / SO42->2.0 ratio decreased. The fastest pH decline was in the COD/SO42-8.0 ratio variation in the anaerobic batch reactor and. The COD / SO42-ratio can help the sulfate reduction process in the optimum value by affecting the sulfate-reducing bacterial metabolism in the balance of the acceptor and the electron donor.

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Efficient Low-pH Iron Removal by a Microbial Iron Oxide Mound Ecosystem at Scalp Level Run

Applied and Environmental Microbiology ◽

10.1128/aem.00015-17 ◽

2017 ◽

Vol 83 (7) ◽

Cited By ~ 11

Author(s):

Christen L. Grettenberger ◽

Alexandra R. Pearce ◽

Kyle J. Bibby ◽

Daniel S. Jones ◽

William D. Burgos ◽

...

Keyword(s):

Acid Mine Drainage ◽

Bacterial Community ◽

Microbial Communities ◽

Mine Drainage ◽

Iron Oxidation ◽

Cost Effective ◽

Low Ph ◽

Content Type ◽

Oxidation Rates ◽

Acid Mine

ABSTRACT Acid mine drainage (AMD) is a major environmental problem affecting tens of thousands of kilometers of waterways worldwide. Passive bioremediation of AMD relies on microbial communities to oxidize and remove iron from the system; however, iron oxidation rates in AMD environments are highly variable among sites. At Scalp Level Run (Cambria County, PA), first-order iron oxidation rates are 10 times greater than at other coal-associated iron mounds in the Appalachians. We examined the bacterial community at Scalp Level Run to determine whether a unique community is responsible for the rapid iron oxidation rate. Despite strong geochemical gradients, including a >10-fold change in the concentration of ferrous iron from 57.3 mg/liter at the emergence to 2.5 mg/liter at the base of the coal tailings pile, the bacterial community composition was nearly constant with distance from the spring outflow. Scalp Level Run contains many of the same taxa present in other AMD sites, but the community is dominated by two strains of Ferrovum myxofaciens, a species that is associated with high rates of Fe(II) oxidation in laboratory studies. IMPORTANCE Acid mine drainage pollutes more than 19,300 km of rivers and streams and 72,000 ha of lakes worldwide. Remediation is frequently ineffective and costly, upwards of $100 billion globally and nearly $5 billion in Pennsylvania alone. Microbial Fe(II) oxidation is more efficient than abiotic Fe(II) oxidation at low pH (P. C. Singer and W. Stumm, Science 167:1121–1123, 1970, https://doi.org/10.1126/science.167.3921.1121 ). Therefore, AMD bioremediation could harness microbial Fe(II) oxidation to fuel more-cost-effective treatments. Advances will require a deeper understanding of the ecology of Fe(II)-oxidizing microbial communities and the factors that control their distribution and rates of Fe(II) oxidation. We investigated bacterial communities that inhabit an AMD site with rapid Fe(II) oxidation and found that they were dominated by two operational taxonomic units (OTUs) of Ferrovum myxofaciens, a taxon associated with high laboratory rates of iron oxidation. This research represents a step forward in identifying taxa that can be used to enhance cost-effective AMD bioremediation.

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