Micropollutants related to human activity in groundwater resources in Barbados, West Indies

Edwards, Quincy A.; Sultana, Tamanna; Куликов, С. М.; Garner-O’Neale, Leah; Metcalfe, Chris D.

doi:10.1016/j.scitotenv.2019.03.314

Cited by 17 publications

(9 citation statements)

References 42 publications

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“…Furthermore, 4-OH-TPN was detected in 47% of the groundwater samples from 54 pesticide monitoring wells in Long Island, New York, with the highest concentration of 368 μg/L . 4-OH-TPN was also detected at ng/L concentration in groundwater in Barbados . A recent study reported that 4-OH-TPN was even detected in human milk at confidence level 1 .…”

Section: Introductionmentioning

confidence: 97%

“…13 4-OH-TPN was also detected at ng/L concentration in groundwater in Barbados. 28 A recent study reported that 4-OH-TPN was even detected in human milk at confidence level 1. 29 Meanwhile, the environmental fate of 4-OH-TPN has been rarely investigated.…”

Section: Introductionmentioning

confidence: 99%

“…Bioremediation is a cost-effective and environmental friendly method to clean up organic contaminated sites . As stated previously, 4-OH-TPN, a polychlorinated compound denser than water, is able to penetrate into groundwater and has been frequently detected in deep groundwater , which is generally under anaerobic conditions. Anaerobic organohalide-respiring bacteria (OHRB) can readily transform chlorinated benzenes, ethanes, ethenes, etc.…”

Section: Introductionmentioning

confidence: 99%

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Complete Reductive Dechlorination of 4-Hydroxy-chlorothalonil by Dehalogenimonas Populations

Qiao

Liu

et al. 2022

Environ. Sci. Technol.

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Chlorothalonil (2,4,5,6-tetrachloroisophthalonitrile, TePN) is one of the most widely used fungicides all over the world. Its major environmental transformation product 4-hydroxy-chlorothalonil (4-hydroxy-2,5,6-trichloroisophthalonitrile, 4-OH-TPN) is more persistent, mobile, and toxic and is frequently detected at a higher concentration in various habitats compared to its parent compound TePN. Further microbial transformation of 4-OH-TPN has never been reported. In this study, we demonstrated that 4-OH-TPN underwent complete microbial reductive dehalogenation to 4-hydroxy-isophthalonitrile via 4-hydroxy-dichloroisophthalonitrile and 4-hydroxy-monochloroisophthalonitrile. 16S rRNA gene amplicon sequencing demonstrated that Dehalogenimonas species was enriched from 6% to 17–22% after reductive dechlorination of 77.24 μmol of 4-OH-TPN. Meanwhile, Dehalogenimonas copies increased by one order of magnitude and obtained a yield of 1.78 ± 1.47 × 108 cells per μmol Cl– released (N = 6), indicating that 4-OH-TPN served as the terminal electron acceptor for organohalide respiration of Dehalogenimonas species. A draft genome of Dehalogenimonas species was assembled through metagenomic sequencing, which harbors 30 putative reductive dehalogenase genes. Syntrophobacter, Acetobacterium, and Methanosarcina spp. were found to be the major non-dechlorinating populations in the microbial community, who might play important roles in the reductive dechlorination of 4-OH-TPN by the Dehalogenimonas species. This study first reports that Dehalogenimonas sp. can also respire on the seemingly dead-end product of TePN, paving the way to complete biotransformation of the widely present TePN and broadening the substrate spectrum of Dehalogenimonas sp. to polychlorinated hydroxy-benzonitrile.

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Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Complete Reductive Dechlorination of 4-Hydroxy-chlorothalonil by Dehalogenimonas Populations

Qiao

Liu

et al. 2022

Environ. Sci. Technol.

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“…Pharmaceuticals mainly enter the groundwater through human activities such as sewage leakages [11,12]. Recently, several medical products from various classes have been found in groundwater [13][14][15][16][17][18][19]. Generally, pharmaceuticals in groundwater are regarded as emerging groundwater contaminants, and their long-term potential risk has been studied…”

Section: Introductionmentioning

confidence: 99%

Carbamazepine Levels Related to the Demographic Indicators in Groundwater of Densely Populated Area

Ebrahimzadeh

Castiglioni

Riva

et al. 2021

Water

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Consumption of pharmaceuticals by people is growing. Carbamazepine (CBZ) is an extensively used anti-epileptic drug that is recalcitrant to degradation. As a result, CBZ has been widely detected in the aquatic ecosystem due to its daily consumption and drainage in sewage systems. Leakages from sewage networks and septic tanks may represent one of the main sources of CBZ in groundwater. In this study, CBZ concentrations in groundwater and their correlations with the demographic structure of the population were investigated in the densely populated Milan urban area. Seventy-six demographic variables were retrieved from the Italian Population and Housing census. Twenty-one groundwater samples were collected from unconfined and semi-confined aquifers of the Milan area and the concentration of CBZ was measured. Groundwater CBZ levels in both aquifers were associated with the demographic data within a circular buffer with a radius of 1.5 km. All data were analyzed using a multivariate statistical approach. The results showed a significant association (p < 0.05) between CBZ concentrations and specific demographic segments of the population. Higher CBZ concentrations were found to be associated with the population aged 70 years and over (aging index), and with families having children aged under 5 years (family index). In addition, the divorce index was correlated with the high concentration of CBZ, whereas the educated and sexagenarian population showed a negative correlation. Our results indicated that the contamination of CBZ follows the same pattern in unconfined and semi-confined aquifers, which are used for drinking water purposes in Milan area. Therefore, changing the CBZ consumption pattern or replacing CBZ with other drugs may strongly influence groundwater contamination of the investigated area.

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“…It can also be a potential chemical marker of contamination from domestic wastewater because it is clearly from anthropogenic origin (Koroša et al, 2016;Seiler et al, 1999), and it has become a common and powerful method in assessing an anthropogenic impacts in groundwater (McCance et al, 2018;Schaider et al, 2016). Edwards et al (2019) showed that caffeine was detected in groundwater seasonal sampling campaigns and concluded that groundwater was being contaminated by in ltration of wastewater into the aquifer. In contrast, in another study, caffeine was not detected in any groundwater samples presumably due to the microbial degradation in the septic system or within the soil pro le, vadose zone, and/or underlying groundwater (Yang et al, 2017a).…”

Section: Introductionmentioning

confidence: 99%

Caffeine as a Pollution Marker for Shallow Groundwaters in a Peri-Urban Area of Campinas / São Paulo – Brazil

Rupias

Pereira

Abreu

et al. 2021

Preprint

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The presence of emerging contaminants, including caffeine, in groundwater can represent an anthropogenic contamination that can impact human health. The present research aims to use caffeine as a wastewater pollution marker of shallow groundwaters in the peri-urban area of Campinas/SP. For a better evaluation of caffeine as an anthropogenic marker, more conventional markers were also analyzed, such as Cl-, NO3-, K+, B, NH4+, NO2- and DOC, and physicochemical parameters such as pH, Eh and EC. Two samplings campaign were done, the first in April (wet season) and the second in August 2019 (dry season), where 18 domestic wells, one sample from the river and one sample from an abandoned meander were selected points to collect water for physicochemical analysis. Nine wells and an abandoned meander waters were selected for the analysis of caffeine. Results show correlations between NO3- and Cl- indicating apport of domestic septic tanks sewage in groundwater. Caffeine, however, was detected in three samples and quantified in one during the wet season and was detected in two samples and quantified in one during the dry season. In the area, caffeine and nitrate have opposite behavior due to reducing conditions of the environment. The study area is rich in dissolved organic carbon, so the conditions for caffeine conservation are not ideal, because it degrades rapidly in groundwaters rich in bacteria and organic matter. Even in this scenario, caffeine was detected in groundwater in the study area, providing unambiguous evidence of anthropogenic pollution of the phreatic aquifer.

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Micropollutants related to human activity in groundwater resources in Barbados, West Indies

Cited by 17 publications

References 42 publications

Complete Reductive Dechlorination of 4-Hydroxy-chlorothalonil by Dehalogenimonas Populations

Complete Reductive Dechlorination of 4-Hydroxy-chlorothalonil by Dehalogenimonas Populations

Carbamazepine Levels Related to the Demographic Indicators in Groundwater of Densely Populated Area

Caffeine as a Pollution Marker for Shallow Groundwaters in a Peri-Urban Area of Campinas / São Paulo – Brazil

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