A ubiquitous tire rubber–derived chemical induces acute mortality in coho salmon

Science, Год журнала: 2020, Номер 371(6525), С. 185 - 189

Опубликована: Дек. 3, 2020

In U.S. Pacific Northwest coho salmon (

Язык: Английский

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6PPD-Quinone: Revised Toxicity Assessment and Quantification with a Commercial Standard

Environmental Science & Technology Letters, Год журнала: 2022, Номер 9(2), С. 140 - 146

Опубликована: Янв. 11, 2022

Stormwater exposure can cause acute mortality of coho salmon (Oncorhynchus kisutch), and 6PPD-quinone (6PPD-Q) was identified as the primary causal toxicant. Commercial standards 6PPD-Q recently became available; their analysis highlighted a systematic high bias in prior reporting concerning 6PPD-Q. A commercial standard used to re-confirm toxicity estimates juvenile develop liquid chromatography-tandem mass spectrometry analytical method for quantification. Peak area responses were ∼15 times higher than those in-house standards, updated LC50 value (95 ng/L) ∼8.3-fold lower that previously reported. These data support relative comparisons occurrence while confirming substantial lethality While environmental concentrations are expected be lower, also more toxic calculated should categorized “very highly toxic” pollutant aquatic organisms. Isotope dilution-tandem methods enabled accurate quantification (limits <10 within samples.

Язык: Английский

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Treading Water: Tire Wear Particle Leachate Recreates an Urban Runoff Mortality Syndrome in Coho but Not Chum Salmon

Environmental Science & Technology, Год журнала: 2021, Номер 55(17), С. 11767 - 11774

Опубликована: Авг. 19, 2021

Tire tread wear particles (TWP) are increasingly recognized as a global pollutant of surface waters, but their impact on biota in receiving waters is rarely addressed. In the developed U.S. Pacific Northwest, acute mortality adult coho salmon (

Язык: Английский

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Porous Materials for Water Purification

Angewandte Chemie International Edition, Год журнала: 2022, Номер 62(11)

Опубликована: Дек. 20, 2022

Abstract Water pollution is a growing threat to humanity due the pervasiveness of contaminants in water bodies. Significant efforts have been made separate these hazardous components purify polluted through various methods. However, conventional remediation methods suffer from limitations such as low uptake capacity or selectivity, and current quality standards cannot be met. Recently, advanced porous materials (APMs) shown promise improved segregation compared traditional selectivity. These feature merits high surface area versatile functionality, rendering them ideal platforms for design novel adsorbents. This Review summarizes development employment APMs variety treatments accompanied by assessments task‐specific adsorption performance. Finally, we discuss our perspectives on future opportunities purification.

Язык: Английский

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Transformation Products of Tire Rubber Antioxidant 6PPD in Heterogeneous Gas-Phase Ozonation: Identification and Environmental Occurrence

Environmental Science & Technology, Год журнала: 2023, Номер 57(14), С. 5621 - 5632

Опубликована: Март 30, 2023

6PPD, a tire rubber antioxidant, poses substantial ecological risks because it can form highly toxic quinone transformation product (TP), 6PPD-quinone (6PPDQ), during exposure to gas-phase ozone. Important data gaps exist regarding the structures, reaction mechanisms, and environmental occurrence of TPs from 6PPD ozonation. To address these gaps, ozonation was conducted over 24–168 h were characterized using high-resolution mass spectrometry. The probable structures proposed for 23 with 5 subsequently standard-verified. Consistent prior findings, 6PPDQ (C18H22N2O2) one major in (∼1 19% yield). Notably, not observed 6QDI (N-(1,3-dimethylbutyl)-N′-phenyl-p-quinonediimine), indicating that formation does proceed through or associated TPs. Other included multiple C18H22N2O C18H22N2O2 isomers, presumptive N-oxide, N,N′-dioxide, orthoquinone structures. Standard-verified quantified roadway-impacted samples, total concentrations 130 ± 3.2 μg/g methanol extracts tread wear particles (TWPs), 34 4 μg/g-TWP aqueous TWP leachates, 2700 1500 ng/L roadway runoff, 1900 1200 creeks. These demonstrate are likely an important ubiquitous class contaminants environments.

Язык: Английский

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Biochar-based bioretention systems for removal of chemical and microbial pollutants from stormwater: A critical review

Journal of Hazardous Materials, Год журнала: 2021, Номер 422, С. 126886 - 126886

Опубликована: Авг. 11, 2021

Язык: Английский

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A critical review of contaminant removal by conventional and emerging media for urban stormwater treatment in the United States

Water Research, Год журнала: 2020, Номер 187, С. 116434 - 116434

Опубликована: Сен. 17, 2020

Язык: Английский

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Degradation of Polyvinyl Alcohol in US Wastewater Treatment Plants and Subsequent Nationwide Emission Estimate

International Journal of Environmental Research and Public Health, Год журнала: 2021, Номер 18(11), С. 6027 - 6027

Опубликована: Июнь 3, 2021

Polyvinyl alcohol (PVA) is a water-soluble plastic commercially used in laundry and dish detergent pods (LDPs) for which complete understanding of its fate the environment subsequent consequences lacking. The objective this study was to estimate US nationwide emissions PVA resulting from domestic use LDPs, corroborated by nationwide, online consumer survey literature review within conventional wastewater treatment plants (WWTPs). Peer-reviewed publications focusing on degradation critical processes WWTPs were shortlisted as part review, data extracted applied model with set assumptions. Survey results estimated that approximately 17,200 ± 5000 metric ton units per year (mtu/yr) are LDPs US, 10,500 3000 mtu/yr reaching WWTPs. Literature data, when incorporated into our model, resulted ~61% ending up via sludge route ~15.7% aqueous phase. presence environment, regardless matrix, threat ecosystem due potential mobilization heavy metals other hydrophilic contaminants.

Язык: Английский

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Micropollutants in Urban Stormwater Runoff of Different Land Uses

Water, Год журнала: 2021, Номер 13(9), С. 1312 - 1312

Опубликована: Май 7, 2021

The main aim of this study was a survey micropollutants in stormwater runoff Berlin (Germany) and its dependence on land-use types. In one-year monitoring program, event mean concentrations were measured for set 106 parameters, including 85 organic (e.g., flame retardants, phthalates, pesticides/biocides, polycyclic aromatic hydrocarbons (PAH)), heavy metals standard parameters. Monitoring points selected five catchments different urban types, at one river. We detected 77 the parameters least once investigated catchment On average, contained mix 24 µg L−1 1.3 mg metals. For micropollutants, highest all plasticizer diisodecyl phthalate. Concentrations but showed significant differences among While major roads dominant source traffic-related substances such as PAH, each other types some retardants commercial area, pesticides dominated by family homes). Comparison with environmental quality standards (EQS) surface waters shows that 13 8 receiving river exceeded German during storm events, highlighting relevance inputs waters.

Язык: Английский

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A decade of monitoring micropollutants in urban wet-weather flows: What did we learn?

Water Research, Год журнала: 2022, Номер 223, С. 118968 - 118968

Опубликована: Авг. 9, 2022

Urban wet-weather discharges from combined sewer overflows (CSO) and stormwater outlets (SWO) are a potential pathway for micropollutants (trace contaminants) to surface waters, posing threat the environment possible water reuse applications. Despite large efforts monitor in last decade, gained information is still limited scattered. In metastudy we performed data-driven analysis of measurements collected at 77 sites (683 events, 297 detected micropollutants) over decade investigate which most relevant terms 1) occurrence 2) risk aquatic environment, 3) estimate minimum number data be monitoring studies reliably obtain concentration estimates, 4) provide recommendations future campaigns. We highlight prioritized due their high critical levels compared environmental quality standards. These top-listed include contaminants all chemical classes (pesticides, heavy metals, polycyclic aromatic hydrocarbons, personal care products, pharmaceuticals, industrial household chemicals). Analysis 30,000 event mean concentrations shows fraction (> 50%) were below limit quantification, stressing need reliable, standard procedures. High variability was observed among events sites, with differences between micropollutant classes. The required reliable site (error bandwidth 1 around "true" value) depends on individual micropollutant. median 7 CSO (2 31, 80%-interquantile) 6 SWO (1 25 80%-interquantile). Our indicates needed assess global pollution our collection can used an urban catchment. demonstrates how programs will more effective if consequences inherent considered.

Язык: Английский

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