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Microbial communities contribute to the elimination of As, Fe, Mn, and NH4+ from groundwater in household sand filters

Title data

Van Le, Anh ; Straub, Daniel ; Planer-Friedrich, Britta ; Hug, Stephan J. ; Kleindienst, Sara ; Kappler, Andreas:
Microbial communities contribute to the elimination of As, Fe, Mn, and NH4+ from groundwater in household sand filters.
In: Science of the Total Environment. Vol. 838 (2022) Issue 4 . - No. 156496.
ISSN 0048-9697
DOI: https://doi.org/10.1016/j.scitotenv.2022.156496

Abstract in another language

Household sand filters (SFs) are widely applied to remove iron (Fe), manganese (Mn), arsenic (As), and ammonium (NH4+) from groundwater in the Red River delta, Vietnam. Processes in the filters probably include a combination of biotic and abiotic reactions. However, there is limited information on the microbial communities treating varied groundwater compositions and on whether biological oxidation of Fe(II), Mn(II), As(III), and NH4+ contributes to the overall performance of SFs. We therefore analyzed the removal efficiencies, as well as the microbial communities and their potential activities, of SFs fed by groundwater with varying compositions from low (3.3 μg L−1) to high (600 μg L−1) As concentrations. The results revealed that Fe(II)-, Mn(II)-, NH4+-, and NO2−-oxidizing microorganisms were prevalent and contributed to the performance of SFs. Additionally, groundwater composition was responsible for the differences among the present microbial communities. We found i) microaerophilic Fe(II) oxidation by Sideroxydans in all SFs, with the highest abundance in SFs fed by low-As and high-Fe groundwater, ii) Hyphomicropbiaceae as the main Mn(II)-oxidizers in all SFs, iii) As sequestration on formed Fe and Mn (oxyhydr)oxide minerals, iv) nitrification by ammonium-oxidizing archaea (AOA) followed by nitrite-oxidizing bacteria (NOB), and v) unexpectedly, the presence of a substantial amount of methane monooxygenase genes (pmoA), suggesting microbial methane oxidation taking place in SFs. Overall, our study revealed diverse microbial communities in SFs used for purifying arsenic-contaminated groundwater, and our data indicate an important contribution of microbial activities to the key functional processes in SFs.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Household sand filter; Microbial community; Arsenic removal; Nitrification; Nitrifiers; Iron-oxidizers; Manganese-oxidizers; Methanotrophs
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Professor Environmental Geochemistry Group
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Professor Environmental Geochemistry Group > Professor Environmental Geochemistry - Univ.-Prof. Dr. Britta Planer-Friedrich
Profile Fields > Advanced Fields > Ecology and the Environmental Sciences
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Result of work at the UBT: No
DDC Subjects: 500 Science > 500 Natural sciences
500 Science > 550 Earth sciences, geology
Date Deposited: 29 Jun 2022 05:34
Last Modified: 29 Jun 2022 05:37
URI: https://eref.uni-bayreuth.de/id/eprint/70210