Pesticides in US Rivers: Regional differences in use, occurrence, and environmental toxicity, 2013 to 2017

The Science of The Total Environment, Journal Year: 2021, Volume and Issue: 787, P. 147147 - 147147

Published: April 17, 2021

Pesticides pose a threat to the environment, but because of substantial number compounds, comprehensive assessment pesticides and an evaluation risk that they human aquatic life is challenging. In this study, improved analytical methods were used quantify 221 pesticide concentrations in surface waters over time period from 2013 2017. Samples collected 74 river sites conterminous US (CONUS). Potential toxicity was assessed by comparing water standard are considered have adverse effects on health or organisms. The majority use related agriculture, agricultural production varies across CONUS. Therefore, our results summarized region (Northeast, South, Midwest, West Pacific), with expectation crop differences would drive variability use, detection frequency, benchmark exceedance patterns. Although at least 2.5 times higher Midwest (49 kg km-2) than any other four regions West, Pacific, 3 21 average detected 1.5 (n = 25) 8 n 16), potential more evenly distributed. At 50% within each 5 had 1 chronic exceedance. Imidacloprid posed greatest total 245 exceedances 60 sites. These show persist environment beyond site application expected use. Continued monitoring research needed improve understanding life.

Language: Английский

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Application of ToxCast/Tox21 data for toxicity mechanism-based evaluation and prioritization of environmental chemicals: Perspective and limitations

Toxicology in Vitro, Journal Year: 2022, Volume and Issue: 84, P. 105451 - 105451

Published: July 31, 2022

Language: Английский

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Pesticides in surface freshwater: a critical review

Environmental Monitoring and Assessment, Journal Year: 2022, Volume and Issue: 194(6)

Published: May 24, 2022

Language: Английский

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Pharmaceuticals in water and sediment of small streams under the pressure of urbanization: Concentrations, interactions, and risks

The Science of The Total Environment, Journal Year: 2021, Volume and Issue: 808, P. 152160 - 152160

Published: Dec. 3, 2021

Small streams are crucial but vulnerable elements of ecological networks. To better understand the occurrence pharmaceutically active compounds (PhACs) in streams, this study focused on occurrence, distribution, and environmental risk 111 PhACs 7 trace based a total 141 water sediment samples from small located urbanizing region Budapest, Hungary. Eighty-one were detected aqueous phase, whereas sixty-two sediment. Carbamazepine (CBZ) was most frequently identified PhAC water, found 91.5% all samples. However, highest concentrations measured for lamotrigine (344.8 μg·L-1) caffeine (221.4 μg·L-1). Lidocaine occurring (73.8%), maximum CBZ (395.9 ng·g-1) tiapride (187.7 ng·g-1). In both sediment, more downstream wastewater treatment plants (WWTPs) than not affected by treated wastewater, even though no relationship observed between amount number PhACs. The also independent distance WWTP effluents. PhAC-polluted upstream WWTPs, thereby suggesting relevance diffuse emissions addition to outlets. usually present collected at same place time. varying fluctuating water-sediment properties resulted lack correlation general chemical PhACs, which makes it difficult predict contamination risks urbanized streams. assessment indicated that diclofenac had sampling area.

Language: Английский

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Analytical model for organic contaminant transport in a cut-off wall and aquifer dual-domain system considering barrier arrangements

Journal of Contaminant Hydrology, Journal Year: 2023, Volume and Issue: 259, P. 104259 - 104259

Published: Oct. 30, 2023

Language: Английский

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Multiple in-stream stressors degrade biological assemblages in five U.S. regions

The Science of The Total Environment, Journal Year: 2021, Volume and Issue: 800, P. 149350 - 149350

Published: July 31, 2021

Language: Английский

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Chemical prioritization of pharmaceuticals and personal care products in an urban tributary of the Potomac River

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 881, P. 163514 - 163514

Published: April 15, 2023

Pharmaceuticals and personal care products (PPCPs) are incredibly diverse in terms of chemical structures, physicochemical properties, modes action, making their environmental impacts challenging to assess. New prioritization methodologies have emerged that compare contaminant monitoring concentrations multiple toxicity data sources, including whole organism high-throughput data, develop a list "high priority" chemicals requiring further study. We applied such an approach assess PPCPs Hunting Creek, urban tributary the Potomac River near Washington, DC, which has experienced extensive human population growth. estimated potential risks 99 from surface water sediment collected upstream downstream major wastewater treatment plant (WWTP), nearby combined sewer overflows (CSO), adjacent River. The greatest aquatic ecosystem occurred WWTP CSO outfalls, but risk levels rapidly dropped below thresholds concern - established by previous studies mainstem. These results suggest tributaries, rather than larger rivers, important monitor because lower or intermittent flow may not adequately dilute contaminants concern. Common psychotropics, as fluoxetine venlafaxine, presented highest risks, with quotients often > 10 1000 sediment, indicating need for field studies. Several ubiquitous caffeine carbamazepine also exceeded throughout our study area point specific neurotoxic endocrine action warrant investigation. Since many analysis triggered concerns other areas around world, better coordination is needed among programs improve global efforts.

Language: Английский

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Estimating the aquatic risk from exposure to up to twenty-two pesticide active ingredients in waterways discharging to the Great Barrier Reef

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 892, P. 164632 - 164632

Published: June 7, 2023

Pesticides decrease the quality of water reaching Great Barrier Reef (GBR), Australia. Up to 86 pesticide active ingredients (PAIs) were monitored between July 2015 end June 2018 at 28 sites in waterways that discharge GBR. Twenty-two frequently detected PAIs selected calculate their combined risk when they co-occur samples. Species sensitivity distributions (SSDs) for 22 fresh and marine species developed. The SSDs, multi-substance potentially affected fraction (msPAF) method, Independent Action model joint toxicity a Multiple Imputation method convert measured PAI concentration data estimates Total Pesticide Risk (TPR22) expressed as average percentage during wet season (i.e., 182 days). TPR22 percent contribution Photosystem II inhibiting herbicides, Other Herbicides, Insecticides estimated. ranged from <1 % 42 aquatic being affected. Approximately 85 >1 - meaning did not meet 2050 Water Quality Improvement Plan's target waters entering There marked spatial differences regions dominated by grazing had lower while those with sugar cane tended have higher estimates. On average, PSII herbicides contributed 39 TPR22, Herbicides ~36 ~24 %. Nine (diuron, imidacloprid, metolachlor, atrazine, MCPA, imazapic, metsulfuron, triclopyr ametryn) responsible >97 across all waterways.

Language: Английский

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Predictive value of the ToxCast/Tox21 high throughput toxicity screening data for approximating in vivo ecotoxicity endpoints and ecotoxicological risk in eco- surveillance applications

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 914, P. 169783 - 169783

Published: Jan. 4, 2024

Language: Английский

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Water quality deterioration remains a major stressor for macroinvertebrate, diatom and fish communities in German rivers

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 907, P. 167994 - 167994

Published: Oct. 22, 2023

About 60 % of Europe's rivers fail to meet ecological quality standards derived from biological criteria. The causes are manifold, but recent reports suggest a dominant role hydro-morphological and water quality-related stressors. Yet, in particular micropollutants hydrological stressors often tend be underrepresented multiple-stressor studies. Using monitoring data four Federal States Germany, this study investigated the effects 19 stressor variables six groups (nutrients, salt ions, dissolved oxygen/water temperature, mixture toxicity 51 micropollutants, alteration morphological habitat quality) on three assemblages (fishes, macroinvertebrates, benthic diatoms). Biological were analyzed for 35 community metrics quantified using Random Forest (RF) analyses put into hierarchical context. To compare metric responses, grouped categories reflecting important characteristics communities, such as sensitivity, functional traits, diversity composition well composite indices that integrate several one single index (e.g., class). Water - not turned out dominate responses all assemblages. In contrast, less pronounced stronger than Explained variances RF models ranged 23-64 16-40 diatoms 18-48 fishes. Despite high variability across groups, sensitivity tended reveal individual higher explained variance indices. results (physico-chemical) deterioration continues impact many German rivers, despite extensive progress wastewater treatment during past decades. detect deterioration, schemes need target relevant physico-chemical micropollutants. Furthermore, needs measures flow magnitude dynamics). At present, surveys rarely address degree alteration. order achieve good status, river restoration management both Restricting just organism group macroinvertebrates) or only selected class) may hamper identification its classification and, thus mislead management.

Language: Английский

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