Arsenic mobilization by anaerobic iron-dependent methane oxidation

Straub, Daniel; Jetten, Mike S. M.; Głodowska, Martyna; Kappler, Andreas; Kleindienst, Sara; Cirpka, Olaf A.; Rathi, Bhasker; Lightfoot, Alexandra; Stopelli, Emiliano; Berg, Michael; Kipfer, Rolf; Winkel, Lenny H. E.; Schneider, M.; Eiche, Elisabeth; Kontny, Agnes; Neumann, Thomas; Viet, Pham Hung; Pham, Trang; Vu, Duong; Lan, Vi Mai; Tran, Mai Hoang; Nga, Viet; Prommer, Henning

doi:10.1038/s43247-020-00037-y

Cited by 44 publications

(20 citation statements)

References 42 publications

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“…For example, ferrous iron and arsenite can serve as electron donors for several chemolithotrophic microbes that use oxygen or nitrate as electron acceptors (Hassan et al, 2015). Sulfur-cycling bacteria and methane oxidizers can also impact arsenic and iron mobilization in sediments (Glodowska et al, 2020). As reported previously (Cúcio et al, 2018;Scholz et al, 2019;Tarquinio et al, 2019;Martin et al, 2020a,b), the seagrass root bacterial community was overwhelmingly dominated by putative sulfur cyclers, particularly sulfide oxidizers such as [Ca.…”

Section: Linking Seagrass Root Bacteria To Root Tissue Nutrients and Root Tissue Metalsmentioning

confidence: 65%

Composition of Seagrass Root Associated Bacterial Communities Are Linked to Nutrients and Heavy Metal Concentrations in an Anthropogenically Influenced Estuary

et al. 2022

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Seagrasses are globally recognized as bioindicators of marine eutrophication and contamination. Seagrasses also harbor a distinct root microbial community that largely reflects the conditions of the surrounding environment as well as the condition of the seagrass. Hence monitoring changes in the root microbial community could act as an additional biological indicator that reflects both the seagrass health condition, as well as potential deterioration in coastal waters. We used 16S rRNA gene sequencing combined with analysis of seagrass nutrients (C, N, δ15N, δ13C) and tissue metal concentrations to investigate potential links between seagrass (Halophila ovalis) root bacteria and seagrass nutrient and metal concentrations within an anthropogenically influenced estuary. We found seagrass tissue nitrogen (%) and δ15N values were 2–5 times higher than global averages for this species. Seagrass root associated bacteria formed distinct communities that clustered by site and were correlated to both seagrass nutrient and metal concentration, with some putative sulfide oxidizing bacteria (Sulfurimonas and Sulfurovum) correlated with greater nutrient concentrations, and putative iron cycling bacteria (Lewinella and Woeseia) correlated with greater Fe and As concentrations. Our findings shed further light on the relationship between seagrass and their microbes, as well as provide additional assessment of the use of both seagrass and their microbes as indicators of estuarine and seagrass condition.

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Section: Linking Seagrass Root Bacteria To Root Tissue Nutrients and Root Tissue Metalsmentioning

confidence: 65%

Composition of Seagrass Root Associated Bacterial Communities Are Linked to Nutrients and Heavy Metal Concentrations in an Anthropogenically Influenced Estuary

et al. 2022

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“…Substantial mercury methylation and subsequent emission also occur in these settings (St Louis et al, 1994;Skyllberg, 2008;Schaefer et al, 2014;Riscassi et al, 2016;Singer et al, 2016;Yang et al, 2016). Many of these processes in subsurface aquatic systems also couple to the biogeochemical cycling of other elements, such as iron and sulfur (Koretsky et al, 2003;Hlaváčová et al, 2005;Hansel et al, 2015;Segarra et al, 2015;Glodowska et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Consistent Controls on Trace Metal Micronutrient Speciation in Wetland Soils and Stream Sediments

Yan¹,

Sharma²,

Flynn³

et al. 2022

Preprint

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Trace metal are essential for microbially-mediated biogeochemical processes occurring in anoxic wetland soils and stream bed sediments, but low availability of these elements may inhibit anaerobic element cycling and transformations. Solid-phase speciation is likely a critical control on trace metal availability but has seen limited study in anoxic systems having concentrations similar to geological background levels, where metal limitations may be most prevalent. We have investigated trace metal concentrations and solid-phase speciation in three freshwater subsurface aquatic systems: marsh wetland soils, riparian wetland soils, and the sediments of a streambed. These systems displayed low solid-phase trace metal concentrations, generally at or below geological background levels, which generally followed the trend Zn > Cu ≈ Ni > Co and showed no correlation with major element compositions. All soils and sediments were dominated by quartz but varied in clay mineralogy as well as the organic matter, total sulfur, and total iron contents. X-ray absorption near-edge structure (XANES) spectroscopy shows that sulfur speciation in both wetlands is dominated by organic sulfur. Elemental sulfur and iron sulfides together made up <25% of the sulfur in the wetland soils, but the distribution between inorganic and organic forms was reversed in the stream sediments. Ferrous and ferric iron in clay minerals were common species identified by both XANES and extended X-ray absorption fine structure (EXAFS) spectroscopies at all sites. Iron(III) oxides were substantial components in all but the marsh wetland soils. Quantitative analysis of copper, nickel, and zinc XANES spectra revealed similar metal speciation across all sites. Copper speciation was dominated by sulfides, adsorbed species, and minor amounts of copper bound to organic matter; no metallic copper was detected. Nickel speciation also varied little and was dominated by nickel in clay mineral octahedral sheets and nickel sulfide, with adsorbed species also present. Zinc speciation was slightly more varied, with the marsh wetland soils and stream bed sediments containing adsorbed species, zinc associated with clay mineral structures, and zinc bound to reduced sulfur groups on organic matter, whereas the riparian wetland soils lacked clay-associated zinc but contained zinc sulfide. Trace metals bound to reduced sulfur occurred at every site, with a greater sulfur-bound fraction for copper. The fractional abundance of sulfur-bound species showed no relationship with soil or sediment total sulfur content, which varied by two orders of magnitude. More broadly, the observations in this study suggest that trace metal speciation in freshwater wetland soils and stream sediments is consistently dominated by a small set of recurring components which are distinct for each metal. This may represent a general geochemical phenomenon in anoxic soils and sediments containing trace metals at background concentrations (as low as 3 µg g-1) that was not predicted from systems that are contaminated with or naturally-enriched in copper, nickel, or zinc.

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“…Several studies have been conducted on groundwater arsenic contamination in Bangladesh and neighboring West Bengal of India (Acharyya et al 2000;Ravenscroft et al 2001;UNICEF 2001;Chakraborti et al 2010;CSISA-MI 2015;MICS-B 2018;World Bank Group 2019). Numerous studies, not only in Bangladesh but also in other Asian countries, have been conducted, including China (Sun 2004;Jiang et al 2019;Sanjrani et al 2019), India (Paul et al 2015;Chandrashekhar et al 2016;Shaji et al 2020;Alsubih et al 2021), Vietnam (Glodowska et al 2020), and Japan (Hossain et al 2016;Vongphuthone et al 2017), where arsenic contamination in the environment reached an alarming position. However, the results have not produced the mitigation of arsenic poisoning.…”

Section: Graphical Abstract Introductionmentioning

confidence: 99%

Influence of chemical fertilizers on arsenic mobilization in the alluvial Bengal delta plain: a critical review

Islam

Mostafa

2021

Journal of Water Supply: Research and Technology-Aqua

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Arsenic contamination of alluvial aquifers of the Bengal delta plain causes a serious threat to human health for over 75 million people. The study aimed to explore the impacts of chemical fertilizer on arsenic mobilization in the sedimentary deposition of the alluvial Bengal delta plain. It selected ten comparatively higher affected Districts and the least affected two Divisions as a referral study site. The countrywide pooled concentration of arsenic in groundwater was 109.75 μg/L (52.59, 166.91) at a 95% confidence interval, which was double the national guideline value (50 μg/L). The analysis results showed a strong positive correlation (r ≥ 0.5) of arsenic with NO3, NH4, PO4, SO4, Ca, and K, where a portion of those species originated from fertilizer leaching into groundwater. The results showed that PO4 played a significant influence in arsenic mobilization, but the role of NO3, SO4, and NH4 was not clear at certain lithological conditions. It also showed that clay, peat, silt-clay, and rich microbial community with sufficiently organic carbon loaded soils could lead to an increase in arsenic mobilization. Finally, the study observed that the overall lithological conditions are the main reason for the high arsenic load in the study area.

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Arsenic mobilization by anaerobic iron-dependent methane oxidation

Cited by 44 publications

References 42 publications

Composition of Seagrass Root Associated Bacterial Communities Are Linked to Nutrients and Heavy Metal Concentrations in an Anthropogenically Influenced Estuary

Composition of Seagrass Root Associated Bacterial Communities Are Linked to Nutrients and Heavy Metal Concentrations in an Anthropogenically Influenced Estuary

Consistent Controls on Trace Metal Micronutrient Speciation in Wetland Soils and Stream Sediments

Influence of chemical fertilizers on arsenic mobilization in the alluvial Bengal delta plain: a critical review

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