LIVIVO - Search results -

Search results

Result 1 - 10 of total 62

Search options

Article ; Online: Reply to: Uncertainty and bias in Liggio et al. (2019) on CO

Liggio, John / Li, Shao-Meng

2023 Volume 14, Issue 1, Page(s) 5407

Language	English
Publishing date	2023-09-06
Publishing country	England
Document type	Letter
ZDB-ID	2553671-0
ISSN	2041-1723 ; 2041-1723
ISSN (online)	2041-1723
ISSN	2041-1723
DOI	10.1038/s41467-023-40819-4
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

Article ; Online: Multiphase Ozonolysis of Bisphenol A: Chemical Transformations on Surfaces in the Environment.

Yu, Jie / Gong, Yufeng / Nair, Pranav / Liggio, John / Peng, Hui / Abbatt, Jonathan P D

Environmental science & technology

2024 Volume 58, Issue 8, Page(s) 3931–3941

Abstract: High global plastic production volumes have led to the widespread presence of bisphenol compounds in human living and working environments. The most common bisphenol, bisphenol A (BPA), despite being endocrine disruptive and estrogenic, is still not ... ...

Abstract	High global plastic production volumes have led to the widespread presence of bisphenol compounds in human living and working environments. The most common bisphenol, bisphenol A (BPA), despite being endocrine disruptive and estrogenic, is still not fully banned worldwide, leading to continued human exposure via particles in air, dust, and surfaces in both outdoor and indoor environments. While its abundance is well documented, few studies have addressed the chemical transformations of BPA, the properties of its reactive products, and their toxicity. Here, the first gas-surface multiphase ozonolysis experiment of BPA thin films, at a constant ozone mixing ratio of 100 ppb, was performed in a flow tube for periods up to 24 h. Three transformation products involving the addition of 1, 2, and 3 oxygen atoms to the molecule were identified by LC-ESI-HRMS analyses. Exposure of indoor air to thin BPA surface films and BPA-containing thermal paper over periods of days validated the flow tube experiments, demonstrating the rapid nature of this multiphase ozonolysis reaction at atmospherically relevant ozone levels. Multiple transformation pathways are proposed that are likely applicable to not only BPA but also emerging commercial bisphenol products.
MeSH term(s)	Humans ; Benzhydryl Compounds ; Phenols ; Ozone/analysis ; Dust/analysis
Chemical Substances	bisphenol A (MLT3645I99) ; Benzhydryl Compounds ; Phenols ; Ozone (66H7ZZK23N) ; Dust
Language	English
Publishing date	2024-02-13
Publishing country	United States
Document type	Journal Article
ISSN	1520-5851
ISSN (online)	1520-5851
DOI	10.1021/acs.est.3c08932
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: Chloramines as an important photochemical source of chlorine atoms in the urban atmosphere.

Wang, Chen / Liggio, John / Wentzell, Jeremy J B / Jorga, Spiro / Folkerson, Andrew / Abbatt, Jonathan P D

Proceedings of the National Academy of Sciences of the United States of America

2023 Volume 120, Issue 30, Page(s) e2220889120

Abstract: Monochloramine, dichloramine and trichloramine ( ... ...

Abstract	Monochloramine, dichloramine and trichloramine (NH
Language	English
Publishing date	2023-07-17
Publishing country	United States
Document type	Journal Article
ZDB-ID	209104-5
ISSN	1091-6490 ; 0027-8424
ISSN (online)	1091-6490
ISSN	0027-8424
DOI	10.1073/pnas.2220889120
Database	MEDical Literature Analysis and Retrieval System OnLINE

In stock of ZB MED Cologne/Königswinter

Zs.A 1148: Show issues

Location:
Je nach Verfügbarkeit (siehe Angabe bei Bestand)
bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
Jg. 1995 - 2021: Lesesall (1.OG)
ab Jg. 2022: Lesesaal (EG)

Order via subito

Details ▾
- See ZB MED holdings
- Order with fees

Article: Composition and transformation chemistry of tire-wear derived organic chemicals and implications for air pollution

Johannessen, Cassandra / Liggio, John / Zhang, Xianming / Saini, Amandeep / Harner, Tom

Turkish National Committee for Air Pollution Research and Control Atmospheric pollution research journal. 2022 Sept., v. 13, no. 9

2022

Abstract: Pollution derived from car tires is of growing research interest due to its apparent omnipresence in the urban environment and its associated toxicity. Studies have focused largely on the occurrence of these tire materials, deemed tire wear particles ( ... ...

Abstract	Pollution derived from car tires is of growing research interest due to its apparent omnipresence in the urban environment and its associated toxicity. Studies have focused largely on the occurrence of these tire materials, deemed tire wear particles (TWPs), and their associated chemicals in the aquatic environment. However, less attention has been paid to atmospheric TWPs, which can remain airborne and be transported over long distances. In addition, there are few studies pertaining to the gaseous contaminants originating from tire wear, creating a significant knowledge gap. This review aims to summarize the current state of knowledge surrounding atmospheric tire wear pollution by detailing relevant studies conducted under both laboratory and ambient environmental conditions. Organic chemicals that are associated with this form of pollution, including diphenylamine antioxidants, phthalates, benzothiazole, benzotriazoles, and alkylphenols were highlighted for their potential implications for air. While a number of studies have investigated oxidation in aquatic environments, the current review highlights a clear absence of oxidation product information relevant to air. There is also a critical research gap surrounding the physico-chemical properties of these potential atmospheric pollutants. As a result, the environmental behaviour and fate of these contaminants are largely unknown. Based on these knowledge gaps, we propse recommendations for future work to advance this area of research.
Keywords	air ; air pollution ; alkylphenols ; aquatic environment ; diphenylamine ; oxidation ; phthalates ; research ; toxicity ; urban areas
Language	English
Dates of publication	2022-09
Publishing place	Elsevier B.V.
Document type	Article
ZDB-ID	2645757-X
ISSN	1309-1042
ISSN	1309-1042
DOI	10.1016/j.apr.2022.101533
Database	NAL-Catalogue (AGRICOLA)

Full text online

Accessible to users with ZB MED library card

Order via subito

Details ▾
- Full text online
- Order with fees

Article: Atmospheric OH Oxidation Chemistry of Particulate Liquid Crystal Monomers: An Emerging Persistent Organic Pollutant in Air

Liu, Qifan / Liggio, John / Wentzell, Jeremy / Lee, Patrick / Li, Kun / Li, Shao-Meng

Environmental science & technology letters. 2020 July 16, v. 7, no. 9

2020

Abstract: Liquid crystal monomers (LCMs) are synthetic chemicals widely used in liquid crystal displays such as televisions and smartphones and have recently been detected in indoor dust. Despite extensive use, the atmospheric fate of LCMs is unknown. Here, the ... ...

Abstract	Liquid crystal monomers (LCMs) are synthetic chemicals widely used in liquid crystal displays such as televisions and smartphones and have recently been detected in indoor dust. Despite extensive use, the atmospheric fate of LCMs is unknown. Here, the heterogeneous OH oxidation of LCMs was studied by exploring the kinetics and mechanisms of 1-ethyl-4-(4-(4-propylcyclohexyl)phenyl)benzene (EPPB) and 4′′-ethyl-2′-fluoro-4-propyl-1,1′:4′,1′′-terphenyl (EFPT) coated onto ammonium sulfate particles. The measured heterogeneous rate constants for EPPB and EFPT were (7.05 ± 0.46) × 10–¹³ and (4.67 ± 0.25) × 10–¹³ cm³ molecule–¹ s–¹ ,respectively, equivalent to atmospheric lifetimes of up to 25 and 38 days. These lifetimes are significantly longer than previously predicted values (<1 day) for these LCMs, indicating that they are much more persistent in air than predicted, with the potential to undergo long-range transport. Furthermore, 66 transformation products from the heterogeneous photooxidation of these LCMs were identified for the first time. Given the known toxicity of the parent LCMs, their measured persistence in the atmosphere, and the demonstrated complexity of their products, the present results not only underscore the need to quantify the levels of LCMs in ambient air, but also suggest that the presence of their transformation products should not be ignored when assessing the risks of airborne LCMs.
Keywords	air ; ammonium sulfate ; dust ; liquid crystals ; mobile telephones ; persistent organic pollutants ; photooxidation ; technology ; toxicity
Language	English
Dates of publication	2020-0716
Size	p. 646-652.
Publishing place	American Chemical Society
Document type	Article
Note	NAL-AP-2-clean
ISSN	2328-8930
DOI	10.1021/acs.estlett.0c00447
Database	NAL-Catalogue (AGRICOLA)

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: A newly developed Lagrangian chemical transport scheme: Part 1. Simulation of a boreal forest fire plume

Liu, Yayong / Huang, Yufei / Liggio, John / Hayden, Katherine / Mihele, Cris / Wentzell, Jeremy / Wheeler, Edwin Michael / Leithead, Amy / Moussa, Samar / Xie, Conghui / Yang, Yanrong / Zhang, Yuheng / Han, Tianran / Li, Shao-Meng

Elsevier B.V. Science of the Total Environment. 2023 July, v. 880 p.163232-

2023

Abstract: Forest fire research over the last several decades has improved the understanding of fire emissions and impacts. Nevertheless, the evolution of forest fire plumes remains poorly quantified and understood. Here, a Lagrangian chemical transport model, the ... ...

Abstract	Forest fire research over the last several decades has improved the understanding of fire emissions and impacts. Nevertheless, the evolution of forest fire plumes remains poorly quantified and understood. Here, a Lagrangian chemical transport model, the Forward Atmospheric Stochastic Transport model coupled with the Master Chemical Mechanism (FAST-MCM), has been developed to simulate the transport and chemical transformations of plumes from a boreal forest fire over several hours since their emission. The model results for NOx (NO and NO₂), O₃, HONO, HNO₃, pNO₃ and 70 VOC species are compared with airborne in-situ measurements within plume centers and their surrounding portions during the transport. Comparisons between simulation results and measurements show that the FAST-MCM model can properly reproduce the physical and chemical evolution of forest fire plumes. The results indicate that the model can be an important tool used to aid the understanding of the downwind impacts of forest fire plumes.
Keywords	boreal forests ; environment ; evolution ; forest fires ; models ; nitrous acid ; Lagrangian transport model ; Eulerian chemical scheme ; Airborne measurements ; Boreal forest fire plumes ; FAST ; MCM
Language	English
Dates of publication	2023-07
Publishing place	Elsevier B.V.
Document type	Article ; Online
ZDB-ID	121506-1
ISSN	1879-1026 ; 0048-9697
ISSN (online)	1879-1026
ISSN	0048-9697
DOI	10.1016/j.scitotenv.2023.163232
Database	NAL-Catalogue (AGRICOLA)

Full text online

Accessible to users with ZB MED library card

In stock of ZB MED Bonn / Germany

Z 74/341: Show issues

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Details ▾

Article ; Online: Aircraft and satellite observations reveal historical gap between top-down and bottom-up CO

Wren, Sumi N / McLinden, Chris A / Griffin, Debora / Li, Shao-Meng / Cober, Stewart G / Darlington, Andrea / Hayden, Katherine / Mihele, Cristian / Mittermeier, Richard L / Wheeler, Michael J / Wolde, Mengistu / Liggio, John

PNAS nexus

2023 Volume 2, Issue 5, Page(s) pgad140

Abstract: Measurement-based estimates of greenhouse gas (GHG) emissions from complex industrial operations are challenging to obtain, but serve as an important, independent check on inventory-reported emissions. Such top-down estimates, while important for oil and ...

Abstract	Measurement-based estimates of greenhouse gas (GHG) emissions from complex industrial operations are challenging to obtain, but serve as an important, independent check on inventory-reported emissions. Such top-down estimates, while important for oil and gas (O&G) emissions globally, are particularly relevant for Canadian oil sands (OS) operations, which represent the largest O&G contributor to national GHG emissions. We present a multifaceted top-down approach for estimating CO
Language	English
Publishing date	2023-04-18
Publishing country	England
Document type	Journal Article
ISSN	2752-6542
ISSN (online)	2752-6542
DOI	10.1093/pnasnexus/pgad140
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: A newly developed Lagrangian chemical transport scheme: Part 1. Simulation of a boreal forest fire plume.

Liu, Yayong / Huang, Yufei / Liggio, John / Hayden, Katherine / Mihele, Cris / Wentzell, Jeremy / Wheeler, Michael / Leithead, Amy / Moussa, Samar / Xie, Conghui / Yang, Yanrong / Zhang, Yuheng / Han, Tianran / Li, Shao-Meng

The Science of the total environment

2023 Volume 880, Page(s) 163232

Abstract	Forest fire research over the last several decades has improved the understanding of fire emissions and impacts. Nevertheless, the evolution of forest fire plumes remains poorly quantified and understood. Here, a Lagrangian chemical transport model, the Forward Atmospheric Stochastic Transport model coupled with the Master Chemical Mechanism (FAST-MCM), has been developed to simulate the transport and chemical transformations of plumes from a boreal forest fire over several hours since their emission. The model results for NOx (NO and NO
Language	English
Publishing date	2023-04-04
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	121506-1
ISSN	1879-1026 ; 0048-9697
ISSN (online)	1879-1026
ISSN	0048-9697
DOI	10.1016/j.scitotenv.2023.163232
Database	MEDical Literature Analysis and Retrieval System OnLINE

Full text online

Accessible to users with ZB MED library card

In stock of ZB MED Cologne/Königswinter

Zs.A 949: Show issues

Location:
Je nach Verfügbarkeit (siehe Angabe bei Bestand)
bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
Jg. 1995 - 2021: Lesesall (1.OG)
ab Jg. 2022: Lesesaal (EG)

Order via subito

Details ▾

Article: Understanding the Impact of Relative Humidity and Coexisting Soluble Iron on the OH-Initiated Heterogeneous Oxidation of Organophosphate Flame Retardants

Liu, Qifan / Liggio, John / Li, Kun / Lee, Patrick / Li, Shao-Meng

Environmental science & technology. 2019 May 22, v. 53, no. 12

2019

Abstract: The current uncertainties in the reactivity and atmospheric persistence of particle-associated chemicals present a challenge for the prediction of long-range transport and deposition of emerging chemicals such as organophosphate flame retardants, which ... ...

Abstract	The current uncertainties in the reactivity and atmospheric persistence of particle-associated chemicals present a challenge for the prediction of long-range transport and deposition of emerging chemicals such as organophosphate flame retardants, which are ubiquitous in the global environment. Here, the OH-initiated heterogeneous oxidation kinetics of organophosphate flame retardants (OPFRs) coated on inert (NH4)2SO4 and redox-active FeSO4 particles were systematically determined as a function of relative humidity (RH). The derived reaction rate constants for the heterogeneous loss of tricresyl phosphate (TCP; kTCP) and tris(2-butoxyethyl) phosphate (TBEP; kTBEP) were in the range of (2.69–3.57) × 10–12 and (3.06–5.55) × 10–12 cm3 molecules–1 s–1, respectively, depending on the RH and coexisting Fe(II) content. The kTCP (coated on (NH4)2SO4) was relatively constant over the investigated RH range while kTBEP was enhanced by up to 19% with increasing RH. For both OPFRs, the presence of Fe(II) enhanced their k by up to 53% over inert (NH4)2SO4. These enhancement effects (RH and Fe(II)) were attributed to fundamental changes in the organic phase state (higher RH lowered particle viscosity) and Fenton-type chemistry which resulted in the formation of reactive oxygen species, respectively. Such findings serve to emphasize the importance of ambient RH, the phase state of particle-bound organics in general, and the presence of coexisting metallic species for an accurate description of the degradation kinetics and aging of particulate OPFRs in models used to evaluate their atmospheric persistence.
Keywords	ammonium sulfate ; ferrous sulfate ; flame retardants ; iron ; models ; organophosphorus compounds ; oxidation ; phosphates ; prediction ; reactive oxygen species ; relative humidity ; uncertainty ; viscosity
Language	English
Dates of publication	2019-0522
Size	p. 6794-6803.
Publishing place	American Chemical Society
Document type	Article
ISSN	1520-5851
DOI	10.1021/acs.est.9b01758
Database	NAL-Catalogue (AGRICOLA)

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article: Evolution of Atmospheric Total Organic Carbon from Petrochemical Mixtures

Li, Kun / Wentzell, Jeremy J. B. / Liu, Qifan / Leithead, Amy / Moussa, Samar G. / Wheeler, Michael J. / Han, Chong / Lee, Patrick / Li, Shao-Meng / Liggio, John

Environmental science & technology. 2021 Sept. 16, v. 55, no. 19

2021

Abstract: Reactive organic compounds play a central role in the formation of ozone and secondary organic aerosols. The ability to accurately predict their fate, in part, relies upon quantitative knowledge of the chemical and physical parameters associated with the ...

Abstract	Reactive organic compounds play a central role in the formation of ozone and secondary organic aerosols. The ability to accurately predict their fate, in part, relies upon quantitative knowledge of the chemical and physical parameters associated with the total organic carbon (TOC), which includes both precursors and oxidation products that evolve in the atmosphere over short to long time scales. However, such knowledge, obtained via limited carbon closure experiments, has not been attained for complex anthropogenic emissions. Here we present the first comprehensive characterization of TOC in the atmospheric oxidation of organic vapors from light and heavy oil mixtures associated with oil sand operations. Despite the complexity of the investigated oil mixtures, we are able to achieve carbon closure (83–116%) within the uncertainties (±20%), with the degree of the closure being dependent upon the vapor composition and NOₓ levels. In contrast to biogenic precursors (e.g., α-pinene), the photochemical time scale required for a largely complete oxidation and evolution of chemical parameters is very long for the petrochemical vapors (i.e., ∼7–10 days vs ∼1 day), likely due to the lower initial precursor reactivity. This suggests that petrochemical emissions and their impacts are likely to extend further spatially than biogenic emissions, and retain more of their complex composition and reactivity for many days. The results of this work provide key parameters to regional models for further improving the representation of the chemical evolution of petrochemical emissions.
Keywords	environmental science ; oil sands ; oils ; oxidation ; ozone ; photochemistry ; technology ; total organic carbon ; vapors
Language	English
Dates of publication	2021-0916
Size	p. 12841-12851.
Publishing place	American Chemical Society
Document type	Article
ISSN	1520-5851
DOI	10.1021/acs.est.1c02620
Database	NAL-Catalogue (AGRICOLA)

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

To top

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito

Inter-library loan at ZB MED

More links

Kategorien

In stock of ZB MED Cologne/Königswinter

Order via subito

Full text online

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito

Inter-library loan at ZB MED

Full text online

More links

Kategorien

In stock of ZB MED Bonn / Germany

Order via subito

Inter-library loan at ZB MED

More links

Kategorien

Order via subito

Inter-library loan at ZB MED

Full text online

More links

Kategorien

In stock of ZB MED Cologne/Königswinter

Order via subito

More links

Kategorien

Order via subito

Inter-library loan at ZB MED

More links

Kategorien

Order via subito

Inter-library loan at ZB MED