Sulfate reduction in groundwater: characterization and applications for remediation

Miao, Zhouwei; Brusseau, Mark L.; Carroll, Kenneth C.; Carreón-Diazconti, Concepción; Johnson, Brenda M.

doi:10.1007/s10653-011-9423-1

Cited by 115 publications

(49 citation statements)

References 94 publications

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“…Further, increased values of SO 4 2− content in this sample must be related to extensive pesticide and fertilizer use at the banana plantations. In most of the study area, the low contents of SO 4 −2 and NO 3 − , which is less than 0.4 and 0.13 meq/L, respectively, indicates that the main source of dissolved SO 4 2− and NO 3 − in the groundwater originates from precipitation, or these concentrations have been decreased by reduction processes during transport in the aquifer's porous media (Langmuir, ; Miao, Brusseau, Carroll, Carreón‐Diazconti, & Johnson, ). Nonetheless, more detailed analyses are required to further clarify this process.…”

Section: Discussionmentioning

confidence: 99%

Groundwater evolution and mean water age inferred from hydrochemical and isotopic tracers in a tropical confined aquifer

Villegas

Paredes

Betancur

et al. 2018

Hydrological Processes

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The coastal confined aquifer in the Gulf of Urabá (Colombia) is an important water source for the banana agro-industry as well as for urban and rural communities. However, the main processes controlling recharge and mixing in the aquifer are still poorly understood. Hydrochemical analyses and stable isotope monitoring were conducted to (a) determine groundwater recharge origin, mean groundwater age, and the main processes governing groundwater chemistry and the potential mixing of marine water and the influence of diffusive processes from the two surrounding aquitard layers.Hydrochemical data indicate that the main processes affecting the dissolved chemical composition include cation exchange, dissolution of carbonated and CO 2 , and silicate weathering. δ 18 O and δ 2 H compositions combined with 14 C data highlight the differences in climatic conditions between the recharge zone and the confined section of the aquifer, which is close to the Atlantic Ocean. Groundwater samples with 14 C ages from recent to 28,300 years BP show a depleted isotopic trend ranging from −6.43‰ to −9.14‰ in δ 18 O and from −43.2‰ to −65.7‰ in δ 2 H. The most depleted δ 18 O and δ 2 H compositions suggest a cooler recharge climate than the current conditions (corresponding to the last glacial period of the late Pleistocene). Depleted δ 13 C values in the total dissolved inorganic carbon indicate the existence of organic material oxidation processes within the geologic formation. These results can be used or transferred to enhance groundwater modelling efforts in other confined coastal aquifers of South America where scarcity of long-term monitoring data limits water resources planification under a changing climate. KEYWORDS Colombia, confined coastal aquifer, isotope and geochemical hydrology, mean groundwater ages, recharge areas and groundwater flow

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Section: Discussionmentioning

confidence: 99%

Groundwater evolution and mean water age inferred from hydrochemical and isotopic tracers in a tropical confined aquifer

Villegas

Paredes

Betancur

et al. 2018

Hydrological Processes

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“…Sulfate is common in subsurface environments and is often reported as a cocontaminant with chlorinated solvents at various concentrations (0.2 to 30 mM) (12)(13)(14)(15)(16)(17). The effects of sulfate and its reduction product sulfide on other terminal electron accepting processes have been explored in anaerobic digestion, sulfate reduction, and nitrification, as well as reductive dechlorination processes (17)(18)(19)(20)(21).…”

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confidence: 99%

Effects of Sulfate Reduction on Trichloroethene Dechlorination by Dehalococcoides-Containing Microbial Communities

Mao

Polasko

Alvarez‐Cohen

2017

Appl Environ Microbiol

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In order to elucidate interactions between sulfate reduction and dechlorination, we systematically evaluated the effects of different concentrations of sulfate and sulfide on reductive dechlorination by isolates, constructed consortia, and enrichments containing Dehalococcoides sp. Sulfate (up to 5 mM) did not inhibit the growth or metabolism of pure cultures of the dechlorinator Dehalococcoides mccartyi 195, the sulfate reducer Desulfovibrio vulgaris Hildenborough, or the syntroph Syntrophomonas wolfei. In contrast, sulfide at 5 mM exhibited inhibitory effects on growth of the sulfate reducer and the syntroph, as well as on both dechlorination and growth rates of D. mccartyi. Transcriptomic analysis of D. mccartyi 195 revealed that genes encoding ATP synthase, biosynthesis, and Hym hydrogenase were downregulated during sulfide inhibition, whereas genes encoding metal-containing enzymes involved in energy metabolism were upregulated even though the activity of those enzymes (hydrogenases) was inhibited. When the electron acceptor (trichloroethene) was limiting and an electron donor (lactate) was provided in excess to cocultures and enrichments, high sulfate concentrations (5 mM) inhibited reductive dechlorination due to the toxicity of generated sulfide. The initial cell ratio of sulfate reducers to D. mccartyi (1:3, 1:1, or 3:1) did not affect the dechlorination performance in the presence of sulfate (2 and 5 mM). In contrast, under electron donor limitation, dechlorination was not affected by sulfate amendments due to low sulfide production, demonstrating that D. mccartyi can function effectively in anaerobic microbial communities containing moderate sulfate concentrations (5 mM), likely due to its ability to outcompete other hydrogen-consuming bacteria and archaea.IMPORTANCE Sulfate is common in subsurface environments and has been reported as a cocontaminant with chlorinated solvents at various concentrations. Inconsistent results for the effects of sulfate inhibition on the performance of dechlorination enrichment cultures have been reported in the literature. These inconsistent findings make it difficult to understand potential mechanisms of sulfate inhibition and complicate the interpretation of bioremediation field data. In order to elucidate interactions between sulfate reduction and reductive dechlorination, this study systematically evaluated the effects of different concentrations of sulfate and sulfide on reductive dechlorination by isolates, constructed consortia, and enrichments containing Dehalococcoides sp. This study provides a more fundamental understanding of the competition mechanisms between reductive dechlorination by Dehalococcoides mccartyi and sulfate reduction during the bioremediation process. It also provides insights on the significance of sulfate concentrations on reductive dechlorination under electron donor/acceptor-limiting conditions during in situ bioremediation applications. For example, at a trichloroethene-contaminated site with a high sulfate concentration, proper...

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“…Sulfate reduction also produces CO 2 . If SO 4 2− reduction enhances the production of HCO 3 − by the dissociation of water molecules in the presence of CO 2 , this reaction is accompanied by the production of aqueous HS − gas [31]. The general reaction is given as follows:…”

Section: Fingerprint Of the Laflamme Seawater (Cluster 4; Factor 1)mentioning

confidence: 99%

Subsampling of Regional-Scale Database for improving Multivariate Analysis Interpretation of Groundwater Chemical Evolution and Ion Sources

et al. 2019

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: Multivariate statistics are widely and routinely used in the field of hydrogeochemistry. Trace elements, for which numerous samples show concentrations below the detection limit (censored data from a truncated dataset), are removed from the dataset in the multivariate treatment. This study now proposes an approach that consists of avoiding the truncation of the dataset of some critical elements, such as those recognized as sensitive elements regarding human health (fluoride, iron, and manganese). The method aims to reduce the dataset to increase the statistical representativeness of critical elements. This method allows a robust statistical comparison between a regional comprehensive dataset and a subset of this regional database. The results from hierarchical Cluster analysis (HCA) and principal component analysis (PCA) were generated and compared with results from the whole dataset. The proposed approach allowed for improvement in the understanding of the chemical evolution pathways of groundwater. Samples from the subset belong to the same flow line from a statistical point of view, and other samples from the database can then be compared with the samples of the subset and discussed according to their stage of evolution. The results obtained after the introduction of fluoride in the multivariate treatment suggest that dissolved fluoride can be gained either from the interaction of groundwater with marine clays or from the interaction of groundwater with Precambrian bedrock aquifers. The results partly explain why the groundwater chemical background of the region is relatively high in fluoride contents, resulting in frequent excess in regards to drinking water standards.

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Sulfate reduction in groundwater: characterization and applications for remediation

Cited by 115 publications

References 94 publications

Groundwater evolution and mean water age inferred from hydrochemical and isotopic tracers in a tropical confined aquifer

Groundwater evolution and mean water age inferred from hydrochemical and isotopic tracers in a tropical confined aquifer

Effects of Sulfate Reduction on Trichloroethene Dechlorination by Dehalococcoides-Containing Microbial Communities

Subsampling of Regional-Scale Database for improving Multivariate Analysis Interpretation of Groundwater Chemical Evolution and Ion Sources

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