Which Micropollutants in Water Environments Deserve More Attention Globally?

Environmental Science & Technology, Journal Year: 2021, Volume and Issue: 56(1), P. 13 - 29

Published: Dec. 21, 2021

Increasing chemical pollution of aquatic environments is a growing concern with global relevance. A large number organic chemicals are termed as "micropollutants" due to their low concentrations, and long-term exposure micropollutants may pose considerable risks organisms human health. In recent decades, numerous treatment methods technologies have been proposed remove in water, typically several were chosen target pollutants evaluate removal efficiencies. However, it often unclear whether toxicity occurrence levels frequencies enable them contribute significantly the overall environments. This review intends answer an important lingering question: Which or class deserve more attention globally should be removed higher priority? Different risk-based prioritization approaches used address this question. The risk quotient (RQ) method was found feasible approach prioritize scale its relatively simple assessment procedure extensive use. total 83 case studies using RQ past decade compiled, 473 compounds that selected by screening 3466 three broad classes (pharmaceuticals personal care products (PPCPs), pesticides, industrial chemicals) (RQ > 0.01). To determine importance, we propose surrogate, is, weighted average (WARQ). WARQ integrates intensity frequency achieve comprehensive priority determination. Through metadata analysis, recommend ranked list 53 micropollutants, including 36 PPCPs (e.g., sulfamethoxazole ibuprofen), seven pesticides heptachlor diazinon), 10 perfluorooctanesulfonic acid 4-nonylphenol) for management remediation efforts. One caveat importance does not consider transformation (including disinfection byproducts) new forms antibiotic resistance genes microplastics), directly applicable specific region country. Also, needs mentioning there might no best toward question, hopefully can act small step better answer.

Language: Английский

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Membrane-Confined Iron Oxychloride Nanocatalysts for Highly Efficient Heterogeneous Fenton Water Treatment

Environmental Science & Technology, Journal Year: 2021, Volume and Issue: 55(13), P. 9266 - 9275

Published: June 21, 2021

Heterogeneous advanced oxidation processes (AOPs) allow for the destruction of aqueous organic pollutants via by hydroxyl radicals (•OH). However, practical treatment scenarios suffer from low availability short-lived •OH in bulk, due to both mass transfer limitations and quenching water constituents, such as natural matter (NOM). Herein, we overcome these challenges loading iron oxychloride catalysts within pores a ceramic ultrafiltration membrane, resulting an internal heterogeneous Fenton reaction that can degrade organics complex matrices with pH up 6.2. With confined inside nanopores (∼ 20 nm), this membrane reactor completely removed various fluxes 100 L m–2 h–1 (equivalent retention time 10 s). This pore size excludes NOM (>300 kDa), selectively exposed smaller under confinement showed excellent resiliency representative (simulated surface sand filtration effluent samples). Moreover, exhibited sustained AOPs (>24 h) could be regenerated multiple cycles. Our results suggest feasibility exploiting membrane-based AOP platforms pollutant degradation scenarios.

Language: Английский

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Concentrations of Tire Additive Chemicals and Tire Road Wear Particles in an Australian Urban Tributary

Environmental Science & Technology, Journal Year: 2022, Volume and Issue: 56(4), P. 2421 - 2431

Published: Jan. 31, 2022

Tire road wear particles (TRWPs) are one of the largest sources microplastics to urban environment with recent concerns as they also provide a pathway for additive chemicals leach into environment. Stormwater is major source TRWPs and associated additives surface water, including antioxidant derivative N-(1,3-dimethylbutyl)-N′-phenyl-p-phenylenediamine-quinone (6PPD-quinone) demonstrating links aquatic toxicity at environmentally relevant concentrations. The present study used complementary analysis methods quantify both suite known tire (including 6PPD-quinone) an tributary in Australia during severe storm events. Concentrations increased more than 40 times storms, maximum concentration 2760 ng/L ∑15additives, 88 6PPD-quinone, similar profile observed each storm. were detected peaks between 6.4 18 mg/L, concentrations all highly correlated. Contaminant mass loads this catchment estimated up 100 g/storm 3 252 730 kg TRWPs/storm. While 6PPD-quinone lower previous studies, elevated post suggest prolonged exposure.

Language: Английский

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Occurrences of Tire Rubber-Derived Contaminants in Cold-Climate Urban Runoff

Environmental Science & Technology Letters, Journal Year: 2021, Volume and Issue: 8(11), P. 961 - 967

Published: Sept. 22, 2021

Recent findings that 2-anilo-5-[(4-methylpentan-2-yl)amino]cyclohexa-2,5-diene-1,4-dione (6PPD-quinone), the transformation product of a common tire rubber antioxidant, is acutely toxic in stormwater-impacted streams has highlighted need for better understanding contaminants urban runoff. This study represents one first reports 6PPD-quinone and other rubber-derived compounds stormwater snowmelt cold-climate Canadian city (Saskatoon, 2019–2020). Semiquantification five target compounds, N,N′-diphenylguanidine (DPG), N,N-dicyclohexylmethylamine (DCA), N,N′-dicyclohexylurea (DCU), 1-cyclohexyl-3-phenylurea (CPU), 6PPD-quinone, revealed DPG was most abundant, with average concentrations 60 μg L–1 1 snowmelt. Maximum observed were greater than 300 L–1, equivalent to loadings 15 kg from single rain event. These represent some highest reported runoff globally. 6PPD-Quinone detected 57% (12/21) samples mean concentration approximately 600 ng (2019) 80% (28/31) 80–370 (2019 2020). Concentrations exceeded acute LC50 coho salmon (0.8–1.2 L–1) 20% samples. Mass all chemicals correlated well roads residential land-use area.

Language: 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, Journal Year: 2021, Volume and Issue: 55(17), P. 11767 - 11774

Published: Aug. 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 (

Language: Английский

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NORMAN guidance on suspect and non-target screening in environmental monitoring

Environmental Sciences Europe, Journal Year: 2023, Volume and Issue: 35(1)

Published: Sept. 4, 2023

Abstract Increasing production and use of chemicals awareness their impact on ecosystems humans has led to large interest for broadening the knowledge chemical status environment human health by suspect non-target screening (NTS). To facilitate effective implementation NTS in scientific, commercial governmental laboratories, as well acceptance managers, regulators risk assessors, more harmonisation is required. address this, NORMAN Association members involved activities have prepared this guidance document, based current state knowledge. The document intended provide performing high quality studies data interpretation while increasing promise but also pitfalls challenges associated with these techniques. Guidance provided all steps; from sampling sample preparation analysis chromatography (liquid gas—LC GC) coupled via various ionisation techniques high-resolution tandem mass spectrometry (HRMS/MS), through evaluation reporting context NTS. Although most experience within network still involves water polar compounds using LC–HRMS/MS, other matrices (sediment, soil, biota, dust, air) instrumentation (GC, ion mobility) are covered, reflecting rapid development extension field. Due ongoing developments, different questions addressed manifold use, feel that no standard operation process can be at stage. However, appropriate analytical methods, processing databases commonly compiled workflows introduced, limitations discussed recommendations cases provided. Proper assurance, quantification without reference standards results clear confidence identification assignment complete together a glossary definitions. community greatly supports sharing experiences open science hopes guideline effort.

Language: Английский

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Identification and Prioritization of Environmental Organic Pollutants: From an Analytical and Toxicological Perspective

Chemical Reviews, Journal Year: 2023, Volume and Issue: 123(17), P. 10584 - 10640

Published: Aug. 2, 2023

Exposure to environmental organic pollutants has triggered significant ecological impacts and adverse health outcomes, which have been received substantial increasing attention. The contribution of unidentified chemical components is considered as the most knowledge gap in understanding combined effects pollutant mixtures. To address this issue, remarkable analytical breakthroughs recently made. In review, basic principles on recognition are overviewed. Complementary methodologies (i.e., quantitative structure–activity relationship prediction, mass spectrometric nontarget screening, effect-directed analysis) experimental platforms briefly described. stages technique development and/or essential parts workflow for each then reviewed. Finally, plausible paths applications future screening methods, interdisciplinary techniques achieving toxicant identification, burgeoning strategies risk assessment cocktails discussed.

Language: Английский

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

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(14), P. 5621 - 5632

Published: March 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.

Language: Английский

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Microfluidic sensors for the detection of emerging contaminants in water: A review

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 929, P. 172734 - 172734

Published: April 24, 2024

Language: Английский

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A Nanoconfined FeCo₂O₄-Embedded Ceramic Membrane Regulates Electron Transfer in Peroxymonosulfate Activation to Selectively Generate Singlet Oxygen for Water Decontamination

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(39), P. 17464 - 17474

Published: Aug. 27, 2024

Peroxymonosulfate (PMS)-based advanced oxidation processes (AOPs), as a promising technology for water decontamination, are constrained by low reaction kinetics due to limited selectivity and mass transfer. Herein, we designed nanoconfined FeCo

Language: Английский

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