Universidad Peruana Cayetano Heredia

Addition of organic acids to acid mine drainage polluted wetland sediment leads to microbial community structure and functional changes and improved water quality

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dc.contributor.author Aguinaga Vargas, Oscar Enrique
dc.contributor.author White, Keith N.
dc.contributor.author Dean, Andrew P.
dc.contributor.author Pittman, Jon K.
dc.date.accessioned 2021-10-04T23:00:55Z
dc.date.available 2021-10-04T23:00:55Z
dc.date.issued 2021
dc.identifier.uri https://hdl.handle.net/20.500.12866/9776
dc.description.abstract Acid mine drainage (AMD) is a serious environmental problem worldwide that requires efficient and sustainable remediation technologies including the use of biological mechanisms. A key challenge for AMD bioremediation is to provide optimal conditions for microbial-mediated immobilisation of trace metals. Although organic carbon and oxygen can enhance treatment efficiency, the effect on microbial communities is unclear. In this study, surface sediments from a natural wetland with proven efficiency for AMD bioremediation were artificially exposed to oxygen (by aeration) and/or organic carbon (in the form of mixed organic acids) and incubated under laboratory conditions. In addition to measuring changes in water chemistry, a metagenomics approach was used to determine changes in sediment bacterial, archaeal and fungal community structure, and functional gene abundance. The addition of organic carbon produced major changes in the abundance of microorganisms related to iron and sulfur metabolism (including Geobacter and Pelobacter) and increased levels of particulate metals via sulfate reduction. Aeration resulted in an increase in Sideroxydans abundance but no significant changes in metal chemistry were observed. The study concludes that the utilisation of organic carbon by microorganisms is more important for achieving efficient AMD treatment than the availability of oxygen, yet the combination of oxygen with organic carbon addition did not inhibit the improvements to water quality en_US
dc.language.iso eng
dc.publisher Elsevier
dc.relation.ispartofseries Environmental Pollution
dc.rights info:eu-repo/semantics/restrictedAccess
dc.rights.uri https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es
dc.subject Metal pollution en_US
dc.subject Acid mine drainage en_US
dc.subject Bacterial community en_US
dc.subject Fungal community en_US
dc.subject Metagenomics en_US
dc.subject Microbial bioremediation en_US
dc.title Addition of organic acids to acid mine drainage polluted wetland sediment leads to microbial community structure and functional changes and improved water quality en_US
dc.type info:eu-repo/semantics/article
dc.identifier.doi https://doi.org/10.1016/j.envpol.2021.118064
dc.relation.issn 1873-6424


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