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1. Spatiotemporal footprints of odor compounds in megacity’s food waste streams and policy implication

Author:
Liangmao Zhang; Binghan Wang; Zijiang Wang; Kaiyi Li; Ru Fang; Yinglong Su; Dong Wu; Bing Xie
Source:
Journal of hazardous materials 2022 v.437 pp. 129423
ISSN:
0304-3894
Subject:
acetaldehyde; acetic acid; acetone; air; ambient temperature; cities; food waste; human health; humidity; issues and policy; methylene chloride; multidimensional scaling; odors; seasonal variation; China
Abstract:
... Odor pollution is one of the most critical issues in food waste (FW) recycling and has significant implications for human health. However, knowledge of their occurrence and spatiotemporally dynamic in urban FW streams is limited, making it not conducive to implement targeted odor management. This work followed the occurrence of 81 odor compounds (OCs) in nine FW-air environments along the Shanghai ...
DOI:
10.1016/j.jhazmat.2022.129423

2. The use of yeast‐rich kefir grain as a starter culture in bread making

Author:
Fatma Ataç; Bilge Ertekin Filiz; Zeynep B. Guzel‐Seydim
Source:
Journal of food processing and preservation 2022 v.46 no.5 pp. e15242
ISSN:
0145-8892
Subject:
Kluyveromyces marxianus; Saccharomyces cerevisiae; acetaldehyde; acetic acid; acetone; bakers yeast; breadmaking quality; ethanol; kefir; lactic acid; sourdough; sourdough bread; starter cultures
Abstract:
... To investigate the use of yeasts and lactic acid bacteria from natural kefir grain in bread making and its effects on dough and bread quality. The kefir grains were treated with different food‐based solutions to enrich the yeast content. Three kefir samples were produced with the treated grains (KAL and SIT) and the control (KEF) kefir grains (untreated). The yeasts isolated from the kefir samples ...
DOI:
10.1111/jfpp.15242

3. Kinetic and reaction mechanism of generated by-products in a photocatalytic oxidation reactor: Model development and validation

Author:
Mojtaba Malayeri; Chang-Seo Lee; Jianjun Niu; Jiping Zhu; Fariborz Haghighat
Source:
Journal of hazardous materials 2021 v.419 pp. 126411
ISSN:
0304-3894
Subject:
acetaldehyde; acetic acid; acetone; air pollution; carbon dioxide; commercialization; ethanol; formaldehyde; human health; irradiation; mass transfer; mineralization; model validation; models; oxidation; photocatalysis; pollutants; reaction mechanisms; relative humidity; risk; silica
Abstract:
... Photocatalytic oxidation is a promising technology to control air pollution. However, the formation of hazardous by-products hinders the commercialization application of this technology. This paper reports the development of a novel by-products predictive model considering the mass transfer of the pollutant in the gas phase and kinetic reaction in the solid phase. Two challenge compounds from keto ...
DOI:
10.1016/j.jhazmat.2021.126411

4. Combined UV-irradiation and pyrolysis-GC/MS approach for evaluating the deterioration behavior of ethylene vinyl acetate

Author:
Kanako Yamada; Shogo Kumagai; Toshikazu Shiratori; Tomohito Kameda; Yuko Saito; Atsushi Watanabe; Chuichi Watanabe; Norio Teramae; Toshiaki Yoshioka
Source:
Polymer degradation and stability 2021 v.190 pp. 109623
ISSN:
0141-3910
Subject:
Fourier transform infrared spectroscopy; acetaldehyde; acetic acid; acetone; anhydrides; carbon dioxide; degradation; ethylene-vinyl acetate; irradiation; lactones; pyrolysis gas chromatography; thermal stability; thermogravimetry; ultraviolet radiation
Abstract:
... Ethylene vinyl acetate (EVA), commonly used to encapsulate photovoltaic (PV) modules, deteriorates on prolonged exposure to sunlight. In this work, fresh and deteriorated EVA samples prepared by UV irradiation (500 W m⁻²) over different periods (0–168 h) are characterized by conventional elemental analysis, microscopic observations, Fourier transform infrared (FT-IR) spectroscopy, and thermogravim ...
DOI:
10.1016/j.polymdegradstab.2021.109623

5. Cross-correlations of Biogenic Volatile Organic Compounds (BVOC) emissions typify different phenological stages and stressful events in a Mediterranean Sorghum plantation

Author:
Antonio Manco; Federico Brilli; Daniela Famulari; Daniele Gasbarra; Beniamino Gioli; Luca Vitale; Paul di Tommasi; Benjamin Loubet; Carmen Arena; Vincenzo Magliulo
Source:
Agricultural and forest meteorology 2021 v.303 pp. 108380
ISSN:
0168-1923
Subject:
Sorghum bicolor subsp. drummondii; aboveground biomass; acetaldehyde; acetic acid; acetone; adults; canopy; carbon dioxide; climate change; forests; formic acid; grain sorghum; meteorology; methanol; monoterpenoids; net ecosystem exchange; phenology; plantlets; soil; volatile organic compounds; Mediterranean region; Southern European region
Abstract:
... Climate change will affect the growing season and increase the occurrence of extreme stressful events, thus altering crop phenological phases and the associated emission of biogenic volatile organic compounds (BVOC). BVOC exchange has been poorly investigated in field crops, especially in the Mediterranean area. In this study we report continuous measurements of BVOC fluxes and CO₂ net ecosystem e ...
DOI:
10.1016/j.agrformet.2021.108380

6. Dynamics and mechanisms of volatile organic compound exchanges in a winter wheat field

Author:
A. Bachy; M. Aubinet; C. Amelynck; N. Schoon; B. Bodson; P. Delaplace; A. De Ligne; A. Digrado; P. du Jardin; M.-L. Fauconnier; A. Mozaffar; J.-F. Müller; B. Heinesch
Source:
Atmospheric environment 2020 v.221 pp. 117105
ISSN:
1352-2310
Subject:
acetaldehyde; acetic acid; acetone; aerosols; crops; developmental stages; eddy covariance; emissions; emissions factor; gases; grasses; growing season; leaves; methanol; mixing ratio; models; soil; spectrometers; volatile organic compounds; winter wheat; Belgium
Abstract:
... The understanding of biogenic volatile organic compound (BVOC) exchanges has become a key scientific issue because of their high reactivity and their impact in the atmosphere. However, so far, few studies have focused on BVOCs exchanged by agricultural species, and in particular by winter wheat, despite this species being the leading worldwide crop in terms of harvested area. This study for the fi ...
DOI:
10.1016/j.atmosenv.2019.117105

7. Efficient catalytic degradation of toluene at a readily prepared Mn-Cu catalyst: Catalytic performance and reaction pathway

Author:
Jian-Rong Li; Wan-Peng Zhang; Chang Li; Chi He
Source:
Journal of colloid and interface science 2021 v.591 pp. 396-408
ISSN:
0021-9797
Subject:
acetaldehyde; acetic acid; acetone; benzaldehyde; benzene; benzoquinones; benzyl alcohol; catalysts; catalytic activity; coprecipitation; durability; ethanol; formaldehyde; methanol; mineralization; oxidation; oxygen; phenol; temperature; toluene
Abstract:
... Fabricating of economical transitional metal oxide-based materials with satisfied low-temperature catalytic performance and application perspective is still a challenge in deep degradation of VOCs. Here, Mn-Cu bimetallic oxides were facilely prepared by one-step hydrothermal-redox method, which displayed much higher catalytic activity in toluene oxidation than those synthesized by hydrolysis-drive ...
DOI:
10.1016/j.jcis.2021.01.096

8. Kinetic and mechanistic study of the gas-phase reaction of ozone with γ-terpinene

Author:
Layal Fayad; Cécile Coeur; Thomas Fagniez; Xavier Secordel; Nicolas Houzel; Gaël Mouret
Source:
Atmospheric environment 2021 v.246 pp. 118073
ISSN:
1352-2310
Subject:
acetaldehyde; acetic acid; acetone; atmospheric pressure; cyclohexanes; environment; formaldehyde; formic acid; metrology; oxidation; ozone; ozonolysis; reaction mechanisms; relative humidity; stainless steel; France
Abstract:
... The ozone reaction of γ-terpinene (1-isopropyl-4-methyl-1,4-cyclohexadiene), a monoterperne emitted by Elm, Cypress, Waterhickory and Maple trees, has been investigated at 294 ± 2 K, atmospheric pressure and under dry conditions (relative humidity, RH < 2%) in two simulation chambers of the LPCA laboratory in Dunkerque (France): CHARME (CHamber for the Atmospheric Reactivity and the Metrology of t ...
DOI:
10.1016/j.atmosenv.2020.118073

9. Long-term observations of oxygenated volatile organic compounds (OVOCs) in an urban atmosphere in southern China, 2014–2019

Author:
Shi-Yong Xia; Chuan Wang; Bo Zhu; Xue Chen; Ning Feng; Guang-He Yu; Xiao-Feng Huang
Source:
Environmental pollution 2021 v.270 pp. 116301
ISSN:
0269-7491
Subject:
acetaldehyde; acetic acid; acetone; aerosols; air pollution; biomass; dry season; formic acid; methanol; ozone; pollution control; spectroscopy; temporal variation; volatile organic compounds; wet season; China
Abstract:
... Oxygenated volatile organic compounds (OVOCs) are important precursors and intermediate products of atmospheric photochemical reactions, which can promote the formation of secondary pollutants such as ozone (O₃) and secondary organic aerosol (SOA). However, there have been few studies on the sources of and long-term variation in ambient OVOCs. This study combined sensitive, near real-time measurem ...
DOI:
10.1016/j.envpol.2020.116301

10. Oxidizing Ethanol and 2-Propanol by Hypochlorous Acid Generated from Chloride Ions on HₓWO₃ Photoelectrodes

Author:
Andrew G. Breuhaus-Alvarez; Siqi Li; Nathaniel Z. Hardin; Bart M. Bartlett
Source:
Journal of physical chemistry 2021 v.125 no.48 pp. 26307-26312
ISSN:
1932-7455
Subject:
acetaldehyde; acetic acid; acetone; calcium hypochlorite; ethanol; isopropyl alcohol; lighting; nuclear magnetic resonance spectroscopy; oxidation; pH; photoelectrodes; physical chemistry; semiconductors
Abstract:
... Photoelectrochemically oxidizing aqueous chloride electrolytes (1 M NaCl, pH 3) to hypochlorous acid proceeds on HₓWO₃ semiconducting photoelectrodes using 405 nm illumination at 100 mW/cm² with 1.0 V versus Ag/AgCl constant potential chronoamperometry. The hypochlorous acid serves as an oxidation agent upon adding 100 mM ethanol or 2-propanol into the solution. ¹H NMR spectroscopy shows that 90% ...
DOI:
10.1021/acs.jpcc.1c06286

11. Reaction kinetic study of nonthermal plasma continuous degradation of acetone in a closed-loop reactor

Author:
Xueshuang Li; Man Li; Zhen Peng; Kewen Zheng; Li Xu; Junguo Dong; Guofa Ren; Ping Cheng
Source:
Chemosphere 2020 v.249 pp. 126215
ISSN:
0045-6535
Subject:
acetaldehyde; acetic acid; acetone; byproducts; formic acid; mass spectrometry; methanol; nitrogen dioxide; ozone; prediction; reaction kinetics; volatile organic compounds
Abstract:
... Nonthermal plasma (NTP) degradation has been shown to be a promising method for volatile organic compounds (VOCs) removal from air. However, there have been few studies on the degradation of indoor VOCs using NTP, and even less on their reaction kinetics. In this study, NTP degradation of acetone, a representative of oxygenated VOCs, in a closed-loop reactor operating in recirculation mode was inv ...
DOI:
10.1016/j.chemosphere.2020.126215

12. Toluene oxidation over Co3+-rich spinel Co3O4: Evaluation of chemical and by-product species identified by in situ DRIFTS combined with PTR-TOF-MS

Author:
Jinping Zhong; Yikui Zeng; Dongdong Chen; Shengpeng Mo; Mingyuan Zhang; Mingli Fu; Junliang Wu; Zixue Su; Peirong Chen; Daiqi Ye
Source:
Journal of hazardous materials 2020 v.386 pp. 121957
ISSN:
0304-3894
Subject:
acetaldehyde; acetic acid; acetone; air; benzaldehyde; benzene; benzoquinones; benzyl alcohol; byproducts; catalysts; catalytic activity; cobalt; cobalt oxide; ions; maleic acid; nitrates; nitrogen; oxidation; oxygen; phenol; surface area; temperature; toluene; volatile organic compounds
Abstract:
... Series of Co³⁺-rich spinel Co₃O₄ catalysts were synthesized and evaluated by toluene catalytic oxidation. An outstanding activity was achieved over Co₃O₄-N utilizing Co(NO₃)₂·6H₂O as precursor (T₅₀ = 211 °C, T₉₀ = 217 °C at conditions: 1000 ppm(v), WHSV = 60 000 mL g⁻¹ h⁻¹). Results of comparative characterizations demonstrated that such excellent performance was mainly attributed to large surface ...
DOI:
10.1016/j.jhazmat.2019.121957

13. Impact of Lactobacillus paracasei IMC502 in coculture with traditional starters on volatile and non-volatile metabolite profiles in yogurt

Author:
Yuxiang Gu; Xing Li; Ran Xiao; Olayemi Eyituoyo Dudu; Lin Yang; Ying Ma
Source:
Process biochemistry 2020 v.99 pp. 61-69
ISSN:
1359-5113
Subject:
Lactobacillus paracasei; acetaldehyde; acetic acid; acetoin; acetone; amino acid metabolism; biosynthesis; coculture; diacetyl; flavor; gas chromatography-mass spectrometry; lactose; metabolomics; multivariate analysis; nucleosides; secondary metabolites; solid phase microextraction; sulfur; yogurt
Abstract:
... The impact of Lactobacillus paracasei IMC502 co-fermented with traditional starters on metabolites in yogurt was evaluated using metabolomic analysis. Forty-four volatile metabolites were determined using headspace solid phase microextraction and gas chromatography-mass spectrometry, including alcohols, esters, organic acids, carbonyl and sulfur compounds. Acetaldehyde, diacetyl, acetoin, acetone, ...
DOI:
10.1016/j.procbio.2020.07.003

14. Photochemical aging of Beijing urban PM2.5: Production of oxygenated volatile organic compounds

Author:
Hongling Xia; Di Huang; Fengxia Bao; Meng Li; Yue Zhang; Chuncheng Chen; Jincai Zhao
Source:
Science of the total environment 2020 v.743 pp. 140751
ISSN:
0048-9697
Subject:
acetaldehyde; acetic acid; acetone; environment; formic acid; lighting; organic matter; oxidation; photoaging; photolysis; pollutants; troposphere; volatile organic compounds; China
Abstract:
... PM₂.₅ has become the dominant atmospheric pollutant in many countries. Many components of PM₂.₅ are highly photoactive. However, the photochemical aging of PM₂.₅ remains poorly understood. In this study, the photoaging of real PM₂.₅ samples collected from 2017 to 2018 in Beijing under simulated solar radiation (λ ~ 340–850 nm) was investigated. Our study showed that large amounts of oxygenated vol ...
DOI:
10.1016/j.scitotenv.2020.140751

15. Biogenic volatile organic compound emissions from senescent maize leaves and a comparison with other leaf developmental stages

Author:
A. Mozaffar; N. Schoon; A. Bachy; A. Digrado; B. Heinesch; M. Aubinet; M.-L. Fauconnier; P. Delaplace; P. du Jardin; C. Amelynck
Source:
Atmospheric environment 2018 v.176 pp. 71-81
ISSN:
1352-2310
Subject:
C4 plants; Zea mays; acetaldehyde; acetic acid; acetone; atmospheric chemistry; chlorosis; climate; corn; crops; developmental stages; emissions; environmental factors; leaves; mass spectrometry; methanol; volatile organic compounds
Abstract:
... Plants are the major source of Biogenic Volatile Organic Compounds (BVOCs) which have a large influence on atmospheric chemistry and the climate system. Therefore, understanding of BVOC emissions from all abundant plant species at all developmental stages is very important. Nevertheless, investigations on BVOC emissions from even the most widespread agricultural crop species are rare and mainly co ...
DOI:
10.1016/j.atmosenv.2017.12.020

16. Characterizing oxygenated volatile organic compounds and their sources in rural atmospheres in China

Author:
Yu Han; Xiaofeng Huang; Chuan Wang; Bo Zhu; Lingyan He
Source:
Journal of environmental sciences (China) 2019 v.81 pp. 148-155
ISSN:
1001-0742
Subject:
acetaldehyde; acetic acid; acetone; diurnal variation; formic acid; mass spectrometry; methanol; photochemistry; pollution; summer; volatile organic compounds; China
Abstract:
... Oxygenated volatile organic compounds (OVOCs) are important precursors and products of atmospheric secondary pollution. The sources of OVOCs, however, are still quite uncertain, especially in the atmosphere with much pollution in China. To study the sources of OVOCs in rural atmospheres, a proton transfer reaction mass spectrometry (PTR-MS) was deployed at a northern rural site (WD) and a southern ...
DOI:
10.1016/j.jes.2019.01.017

17. On-line quantification and human health risk assessment of organic by-products from the removal of toluene in air using non-thermal plasma

Author:
Teng Guo; Xueshuang Li; Jianquan Li; Zhen Peng; Li Xu; Junguo Dong; Ping Cheng; Zhen Zhou
Source:
Chemosphere 2018 v.194 pp. 139-146
ISSN:
0045-6535
Subject:
acetaldehyde; acetic acid; acetone; air; benzaldehyde; benzene; benzoic acid; byproducts; dissociation; formaldehyde; formic acid; health effects assessments; human health; mass spectrometry; methanol; nitrogen oxides; ozone; risk; risk assessment process; toluene; volatile organic compounds
Abstract:
... Harmful organic by-products, produced during the removal of volatile organic compounds (VOCs) from the air by treatment with non-thermal plasma (NTP), hinder the practical applications of NTP. An on-line quantification and risk assessment method for the organic by-products produced by the NTP removal of toluene from the air has been developed. Formaldehyde, methanol, ketene, acetaldehyde, formic a ...
DOI:
10.1016/j.chemosphere.2017.11.173

18. Real-time monitoring and quantification of organic by-products and mechanism study of acetone decomposition in a dielectric barrier discharge reactor

Author:
Xueshuang Li; Teng Guo; Zhen Peng; Li Xu; Junguo Dong; Ping Cheng; Zhen Zhou
Source:
Environmental science and pollution research international 2019 v.26 no.7 pp. 6773-6781
ISSN:
0944-1344
Subject:
acetaldehyde; acetic acid; acetone; byproducts; carbon dioxide; formaldehyde; formic acid; free radicals; hydroxyl radicals; mass spectrometry; methanol; monitoring; oxygen; volatile organic compounds
Abstract:
... Non-thermal plasma (NTP) degradation of low-concentration acetone was investigated in a cylindrical dielectric barrier discharge reactor. The effects of oxygen content and flow rate on the removal efficiency at various discharge powers were examined in real-time. The acetone removal efficiency decreases drastically and then remains stable or increases gradually as the O₂ content increases from 0 t ...
DOI:
10.1007/s11356-019-04127-z

19. Quantitative determination of volatile organic compounds formed during Polylactide processing by MHS-SPME

Author:
Rómulo Salazar; Sandra Domenek; Cédric Plessis; Violette Ducruet
Source:
Polymer Degradation and Stability 2017 v.136 pp. 80-88
ISSN:
0141-3910
Subject:
acetaldehyde; acetic acid; acetone; ethanol; extrusion; food packaging; foods; headspace analysis; industry; mass transfer; packaging materials; pellets; polyesters; polylactic acid; quantitative analysis; volatile organic compounds
Abstract:
... Polylactide (PLA), a bio-based polyester, has been used in wide applications including food packaging. Nevertheless, it is well known that mass transfer occurs between packaging polymer and foodstuff leading to safety and quality issues. In this sense, volatile organic compounds (VOCs) present in packaging materials can migrate to the food in contact, changing its sensorial properties. Up to date, ...
DOI:
10.1016/j.polymdegradstab.2016.12.010

20. Reaction of 2-propanol with ozone in aqueous media

Author:
Erika Reisz; Clemens von Sonntag; Agnes Tekle-Röttering; Sergej Naumov; Winfried Schmidt; Torsten C. Schmidt
Source:
Water research 2018 v.128 pp. 171-182
ISSN:
0043-1354
Subject:
Lewis acids; acetaldehyde; acetic acid; acetone; activation energy; formaldehyde; formic acid; hydrides; hydrogen peroxide; isopropyl alcohol; oxidation; ozone; temperature
Abstract:
... This paper deals with reactions occurring in the aqueous system of 2-propanol/ozone. The considered reactions are discussed from thermodynamic and kinetic points of view. The major finding refers to the fact that 2-propanol reacts with O₃ mainly via hydride transfer:(HO)(H₃C)₂CH + O₃ → [(HO)(H₃C)₂C⁺ + HO₃⁻]cₐgₑ → (HO)(H₃C)₂C⁺ + HO₃⁻ → (H₃C)₂CO + H₂O + O₂Arguments supporting this proposed mechanism ...
DOI:
10.1016/j.watres.2017.10.035