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Journal articles on the topic 'Photochemical oxidant cycle'

Author: Grafiati

Published: 4 June 2021

Last updated: 9 February 2022

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1

Nguyen, T. K. V., M. D. Petters, S. R. Suda, and A. G. Carlton. "Trends in particle phase liquid water during the Southern Oxidant and Aerosol Study." Atmospheric Chemistry and Physics Discussions 14, no. 6 (2014): 7469–516. http://dx.doi.org/10.5194/acpd-14-7469-2014.

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Abstract. We present in situ measurements of particle phase liquid water. Measurements were conducted 3 June to 15 July 2013 during the Southern Oxidant and Aerosol Study in the southeastern US. The region is dominated by biogenic emissions, impacted by anthropogenic pollution, photochemically active, humid, and known to contain high concentrations of organic aerosol mass. Measurements characterized mobility number size distributions of ambient atmospheric aerosols in three states: unperturbed, dry, and dry-humidified. Unperturbed measurements describe the aerosol distribution at ambient tempe

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Nguyen, T. K. V., M. D. Petters, S. R. Suda, H. Guo, R. J. Weber, and A. G. Carlton. "Trends in particle-phase liquid water during the Southern Oxidant and Aerosol Study." Atmospheric Chemistry and Physics 14, no. 20 (2014): 10911–30. http://dx.doi.org/10.5194/acp-14-10911-2014.

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Abstract. We present in situ measurements of particle-phase liquid water. Measurements were conducted from 3 June to 15 July 2013 during the Southern Oxidant and Aerosol Study (SOAS) in the southeastern US. The region is photochemically active, humid, dominated by biogenic emissions, impacted by anthropogenic pollution, and known to contain high concentrations of organic aerosol mass. Measurements characterized mobility number size distributions of ambient atmospheric aerosols in three states: unperturbed, dry, and dry-humidified. Unperturbed measurements describe the aerosol distribution at a

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3

Li, Chen, Su Ping Cui, Xian Zheng Gong, Xian Ce Meng, Bo Xue Sun, and Yu Liu. "Life Cycle Assessment of Heavy-Duty Truck for Highway Transport in China." Materials Science Forum 787 (April 2014): 117–22. http://dx.doi.org/10.4028/www.scientific.net/msf.787.117.

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The detailed life cycle assessment of heavy-duty truck for highway transport in China is conducted by Centre of National Material Life Cycle Assessment (CNMLCA). The input of energy and output of pollutants emissions are documented as the life cycle inventory (LCI). The life cycle impact assessment (LCIA) results calculated with the CML method show that the hotspot of environmental impacts from transport in China. The environmental benefits from implementations of European emissions standards in China for transport are also analyzed. The analysis shows that the acidification potential (AP) mak

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Phadnis, Mahesh J., and Gregory R. Carmichael. "Forest fire in the Boreal Region of China and its impact on the photochemical oxidant cycle of East Asia." Atmospheric Environment 34, no. 3 (2000): 483–98. http://dx.doi.org/10.1016/s1352-2310(99)00249-6.

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Dong, Shaoce, Guijun Xian, and Xiao-Su Yi. "Life Cycle Assessment of Ramie Fiber Used for FRPs." Aerospace 5, no. 3 (2018): 81. http://dx.doi.org/10.3390/aerospace5030081.

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With the depletion of natural resources and the deterioration of environment, natural fiber based biomaterials are attracting more and more attentions. Natural fibers are considered to be renewable, biodegradable, and ecofriendly, and have been applied to be used as alternative reinforcements to traditional glass fibers for polymer based composites (GFRP). Natural fiber reinforced polymer (NFRP) composites have been found to be manufactured as secondary structures or interior parts of aircrafts or automobiles. In this paper, a cradle-to-gate life cycle assessment (LCA) study was performed to d

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Soleymani Angili, Tahereh, Katarzyna Grzesik, Anne Rödl, and Martin Kaltschmitt. "Life Cycle Assessment of Bioethanol Production: A Review of Feedstock, Technology and Methodology." Energies 14, no. 10 (2021): 2939. http://dx.doi.org/10.3390/en14102939.

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So far, a lot of efforts have been put in life cycle assessments (LCA) of bioethanol production. There are many works that have assessed bioethanol production in different points of view to illustrate the environmental impacts. This study reviewed former LCA studies on bioethanol produced from various biomass resources by considering the effect of methodological components, technical pathways and feedstock provision on the result of LCA studies. The review evaluated 48 papers published 2002–2021 with a focus on studies that included a complete set of environmental impact categories. However, d

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Ceulemans, K., S. Compernolle та J. F. Müller. "Parameterising secondary organic aerosol from α-pinene using a detailed oxidation and aerosol formation model". Atmospheric Chemistry and Physics 12, № 12 (2012): 5343–66. http://dx.doi.org/10.5194/acp-12-5343-2012.

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Abstract. A new parameter model for α-pinene secondary organic aerosol (SOA) is presented, based on simulations with the detailed model BOREAM (Biogenic hydrocarbon Oxidation and Related Aerosol formation Model). The parameterisation takes into account the influence of temperature, type of oxidant, NOx-regime, photochemical ageing and water uptake, and is suitable for use in global chemistry transport models. BOREAM is validated against recent photooxidation smog chamber experiments, for which it reproduces SOA yields to within a factor of 2 in most cases. In the simple chemical mechanism of t

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8

Xiong, F., K. M. McAvey, K. A. Pratt, et al. "Observation of isoprene hydroxynitrates in the Southeastern United States and implications for the fate of NO<sub><i>x</i></sub>." Atmospheric Chemistry and Physics Discussions 15, no. 13 (2015): 17843–86. http://dx.doi.org/10.5194/acpd-15-17843-2015.

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Abstract. Isoprene hydroxynitrates (IN) are tracers of the photochemical oxidation of isoprene in high NOx environments. Production and loss of IN have a significant influence on the NOx cycle and tropospheric O3 chemistry. To better understand IN chemistry, a series of photochemical reaction chamber experiments were conducted to determine the IN yield from isoprene photooxidation at high NO concentrations (> 100 ppt). By combining experimental data and calculated isomer distributions, a total IN yield of 9(+4/−3) % was derived. The result was applied in a zero-dimensional model to simulate

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Li, Chen, Su Ping Cui, Xian Ce Meng, Zhen Guo Peng, Xian Zheng Gong, and Yu Liu. "Potentials for Denox in Chinese Cement Industry with the Life Cycle Assessment Method." Materials Science Forum 814 (March 2015): 470–75. http://dx.doi.org/10.4028/www.scientific.net/msf.814.470.

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To explore NOx mitigation strategies in Chinese cement industry systematically, a material flow analysis was developed. The realistic output of cement production in China were identified and quantified. The inventory data of Chinese cement production were selected without denitration technology applications at that time. Then the life cycle impact assessment (LCIA) results were calculated with the principal of ISO 14040 and ISO 14044 of Life Cycle Assessment. The impact categories of global warming potential (GWP), acidification potential (AP), eutrophication potential (EP), photochemical oxid

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10

Park, Won-Jun, Rakhyun Kim, Seungjun Roh, and Hoki Ban. "Analysis of Major Environmental Impact Categories of Road Construction Materials." Sustainability 12, no. 17 (2020): 6951. http://dx.doi.org/10.3390/su12176951.

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To address the environmental problems associated with construction materials, the construction industry has made considerable efforts to reduce carbon emissions. However, construction materials cause several other environmental problems in addition to carbon emissions and thus, a comprehensive analysis of environmental impact categories is required. This study aims to determine the major environmental impact categories for each construction material in production stage using the life cycle assessment (LCA) technique on road projects. Through the review of life cycle impact assessment (LCIA) me

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11

Xiong, F., K. M. McAvey, K. A. Pratt, et al. "Observation of isoprene hydroxynitrates in the southeastern United States and implications for the fate of NO<sub><i>x</i></sub>." Atmospheric Chemistry and Physics 15, no. 19 (2015): 11257–72. http://dx.doi.org/10.5194/acp-15-11257-2015.

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Abstract. Isoprene hydroxynitrates (IN) are tracers of the photochemical oxidation of isoprene in high NOx environments. Production and loss of IN have a significant influence on the NOx cycle and tropospheric O3 chemistry. To better understand IN chemistry, a series of photochemical reaction chamber experiments was conducted to determine the IN yield from isoprene photooxidation at high NO concentrations (> 100 ppt). By combining experimental data and calculated isomer distributions, a total IN yield of 9(+4/−3) % was derived. The result was applied in a zero-dimensional model to simulate

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12

Carey, Stephan A., Carol A. Ballinger, Charles G. Plopper, et al. "Persistent rhinitis and epithelial remodeling induced by cyclic ozone exposure in the nasal airways of infant monkeys." American Journal of Physiology-Lung Cellular and Molecular Physiology 300, no. 2 (2011): L242—L254. http://dx.doi.org/10.1152/ajplung.00177.2010.

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Children chronically exposed to high levels of ozone (O3), the principal oxidant pollutant in photochemical smog, are more vulnerable to respiratory illness and infections. The specific factors underlying this differential susceptibility are unknown but may be related to air pollutant-induced nasal alterations during postnatal development that impair the normal physiological functions (e.g., filtration and mucociliary clearance) serving to protect the more distal airways from inhaled xenobiotics. In adult animal models, chronic ozone exposure is associated with adaptations leading to a decreas

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Sun, Xin, Ji Hu Zheng, Peng Zhang, Ming Nan Zhao, He Xia Wu, and Yu Ting Yan. "Comparative Life Cycle Assessment of Chinese Radial Passenger Vehicle Tire." Materials Science Forum 898 (June 2017): 2432–45. http://dx.doi.org/10.4028/www.scientific.net/msf.898.2432.

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The life cycle environmental impacts of the new model radial passenger vehicle tire product was evaluated and compared. the silicon dioxide was added to replace part of the carbon black as filler, with its previous model tire product. The study covers all relevant life cycle stages: from the acquisition of raw materials to the production, use, and end-of-life. The data collected onsite in 2014 by one of the largest Chinese tire companies were used in the assessment. The evaluation is presented in terms of individual impact category according to the CML model. Five impact categories (i.e., glob

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Dinh, Khang Sy, Hung Phuoc Duong, and Tuấn Đình Phan. "ENVIRONMENTAL IMPACTS ASSESSMENT OF BIODIESEL PRODUCTION FROM JATROPHA AND WASTE COOKING OIL (WCO)." Vietnam Journal of Science and Technology 57, no. 5 (2019): 606. http://dx.doi.org/10.15625/2525-2518/57/5/13371.

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Biodiesel that is produced from renewable resources has been rising as a promising candidate to replace conventional energy. Vietnam, with a large amount of land used in agriculture or forestry, has advantaged conditions to produce and develop renewable energy from biomass resources. However, developing biodiesel from agricultural product may affect food security significantly. Therefore, Jatropha that is inedible and waste cooking oil (WCO) could be suitable to biodiesel production. One of the most important aims of using biodiesel to replace fossil diesel is to reduce environmental impacts,

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15

Ceulemans, K., S. Compernolle та J. F. Müller. "Parameterising secondary organic aerosol from α-pinene using a detailed oxidation and aerosol formation model". Atmospheric Chemistry and Physics Discussions 11, № 8 (2011): 23421–68. http://dx.doi.org/10.5194/acpd-11-23421-2011.

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Abstract. A new 10-product parameter model for α-pinene secondary organic aerosol (SOA) is presented, based on simulations with the detailed model BOREAM (Biogenic hydrocarbon Oxidation and Related Aerosol formation Model). The parameterisation takes into account the influence of temperature, type of oxidant, NOx-regime, photochemical ageing and water uptake, and is suitable for use in global chemistry transport models. BOREAM is validated against recent photooxidation smog chamber experiments, for which it reproduces SOA yields to within a factor of 2 in most cases. In the simple chemical mec

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16

Naicker, Vinesh, and Brett Cohen. "A life cycle assessment of e-books and printed books in South Africa." Journal of Energy in Southern Africa 27, no. 2 (2016): 68. http://dx.doi.org/10.17159/2413-3051/2016/v27i2a1343.

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This paper presents the results of a study comparing the life cycle environmental impacts and cumulative energy demands of reading printed books (print system) with those of reading e-books from an Apple Air iPad (digital system), with a specific focus on production of books and use of both options in South Africa. The two systems were compared using the ReCiPe midpoint and cumulative energy demand methods. The findings, which are consistent with international findings, demonstrate that the print system has lower impacts than the digital system in the impact categories of freshwater eutrophica

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17

Kim, Rakhyun, Myung-Kwan Lim, Seungjun Roh, and Won-Jun Park. "Analysis of the Characteristics of Environmental Impacts According to the Cut-Off Criteria Applicable to the Streamlined Life Cycle Assessment (S-LCA) of Apartment Buildings in South Korea." Sustainability 13, no. 5 (2021): 2898. http://dx.doi.org/10.3390/su13052898.

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This study analyzed the characteristics of the environmental impacts of apartment buildings, a typical housing type in South Korea, as part of a research project supporting the streamlined life cycle assessment (S-LCA) of buildings within the G-SEED (Green Standard for Energy and Environmental Design) framework. Three recently built apartment building complexes were chosen as study objects for the quantitative evaluation of the buildings in terms of their embodied environmental impacts (global warming potential, acidification potential, eutrophication potential, ozone layer depletion potential

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Pešta, Jan, Tereza Pavlů, Kristina Fořtová, and Vladimír Kočí. "Sustainable Masonry Made from Recycled Aggregates: LCA Case Study." Sustainability 12, no. 4 (2020): 1581. http://dx.doi.org/10.3390/su12041581.

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For a sustainable building industry, reusable construction with a low demand for primary resources is needed. Moreover, if we want to reduce the amount of construction and demolition waste, construction with recycled aggregate should be considered. To investigate the environmental impacts of such concrete construction, life cycle assessment (LCA) was used to compare the following types of concrete construction: Reusable blocks with recycled brick aggregate, reusable blocks with recycled concrete, reusable blocks with natural aggregate, and regular concrete wall. Firstly, the properties of new

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19

Holmes, C. D., D. J. Jacob, E. S. Corbitt, et al. "Global atmospheric model for mercury including oxidation by bromine atoms." Atmospheric Chemistry and Physics Discussions 10, no. 8 (2010): 19845–900. http://dx.doi.org/10.5194/acpd-10-19845-2010.

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Abstract. Global models of atmospheric mercury generally assume that OH and ozone are the main oxidants converting Hg0 to HgII and thus driving mercury deposition to ecosystems. However, thermodynamic considerations argue against the importance of these reactions. We demonstrate here the viability of atomic bromine (Br) as an alternative Hg0 oxidant. We conduct a global 3-D simulation with the GEOS-Chem model assuming Br to be the sole Hg0 oxidant (Hg + Br model) and compare to the previous version of the model with OH and ozone as the sole oxidants (Hg + OH/O3 model). We specify global 3-D Br

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Holmes, C. D., D. J. Jacob, E. S. Corbitt, et al. "Global atmospheric model for mercury including oxidation by bromine atoms." Atmospheric Chemistry and Physics 10, no. 24 (2010): 12037–57. http://dx.doi.org/10.5194/acp-10-12037-2010.

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Abstract. Global models of atmospheric mercury generally assume that gas-phase OH and ozone are the main oxidants converting Hg0 to HgII and thus driving mercury deposition to ecosystems. However, thermodynamic considerations argue against the importance of these reactions. We demonstrate here the viability of atomic bromine (Br) as an alternative Hg0 oxidant. We conduct a global 3-D simulation with the GEOS-Chem model assuming gas-phase Br to be the sole Hg0 oxidant (Hg + Br model) and compare to the previous version of the model with OH and ozone as the sole oxidants (Hg + OH/O3 model). We s

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Laiblová, Lenka, Jan Pešta, Anuj Kumar, et al. "Environmental Impact of Textile Reinforced Concrete Facades Compared to Conventional Solutions—LCA Case Study." Materials 12, no. 19 (2019): 3194. http://dx.doi.org/10.3390/ma12193194.

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Pitch-faced concrete is becoming a very popular element of modern architecture in the 21st century. In particular, the demand for concrete facades is increasing globally. On the other hand, climate change, environmental degradation, and limited resources are motivations for sustainable building materials. The construction industry is one the highest emitters of CO2 and other greenhouse gases, in which concrete plays a major role. Thus, reduction in the volume of concrete consumption is essential to control greenhouse gases. One approach to this problem is to use textile reinforced concrete (TR

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22

Yoo, J. M., M. J. Jeong, D. Kim, et al. "Spatiotemporal variations of air pollutants (O<sub>3</sub>, NO<sub>2</sub>, SO<sub>2</sub>, CO, PM<sub>10</sub>, and VOCs) with land-use types." Atmospheric Chemistry and Physics Discussions 15, no. 12 (2015): 16985–7050. http://dx.doi.org/10.5194/acpd-15-16985-2015.

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Abstract. The spatiotemporal variations of surface air pollutants (O3, NO2, SO2, CO, and PM10) with four land-use types: residence (R), commerce (C), industry (I) and greenbelt (G) have been investigated at 283 stations in South Korea during 2002–2013, using routinely observed data. The VOCs data at 9 photochemical pollutant monitoring stations available since 2007 were utilized in order to examine their effect on the ozone chemistry. The land-use types, set by the Korean government, were generally consistent with the satellite-derived land covers and with the previous result showing anti-corr

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Yoo, J. M., M. J. Jeong, D. Kim, et al. "Spatiotemporal variations of air pollutants (O<sub>3</sub>, NO<sub>2</sub>, SO<sub>2</sub>, CO, PM<sub>10</sub>, and VOCs) with land-use types." Atmospheric Chemistry and Physics 15, no. 18 (2015): 10857–85. http://dx.doi.org/10.5194/acp-15-10857-2015.

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Abstract. The spatiotemporal variations of surface air pollutants (O3, NO2, SO2, CO, and PM10) with four land-use types, residence (R), commerce (C), industry (I) and greenbelt (G), have been investigated at 283 stations in South Korea during 2002–2013, using routinely observed data. The volatile organic compound (VOC) data at nine photochemical pollutant monitoring stations available since 2007 were utilized in order to examine their effect on the ozone chemistry. The land-use types, set by the Korean government, were generally consistent with the satellite-derived land covers and with the pr

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24

Gordon, T. D., A. A. Presto, A. A. May, et al. "Secondary organic aerosol formation exceeds primary particulate matter emissions for light-duty gasoline vehicles." Atmospheric Chemistry and Physics Discussions 13, no. 9 (2013): 23173–216. http://dx.doi.org/10.5194/acpd-13-23173-2013.

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Abstract. The effects of photochemical aging on emissions from 15 light-duty gasoline vehicles were investigated using a smog chamber to probe the critical link between the tailpipe and ambient atmosphere. The vehicles were recruited from the California in-use fleet; they represent a wide range of model years (1987 to 2011), vehicle types and emission control technologies. Each vehicle was tested on a chassis dynamometer using the unified cycle. Dilute emissions were sampled into a portable smog chamber and then photochemically aged under urban-like conditions. For every vehicle, substantial s

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Gordon, T. D., A. A. Presto, A. A. May, et al. "Secondary organic aerosol formation exceeds primary particulate matter emissions for light-duty gasoline vehicles." Atmospheric Chemistry and Physics 14, no. 9 (2014): 4661–78. http://dx.doi.org/10.5194/acp-14-4661-2014.

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Abstract. The effects of photochemical aging on emissions from 15 light-duty gasoline vehicles were investigated using a smog chamber to probe the critical link between the tailpipe and ambient atmosphere. The vehicles were recruited from the California in-use fleet; they represent a wide range of model years (1987 to 2011), vehicle types and emission control technologies. Each vehicle was tested on a chassis dynamometer using the unified cycle. Dilute emissions were sampled into a portable smog chamber and then photochemically aged under urban-like conditions. For every vehicle, substantial s

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26

Trentin, Adan William da Silva, Adilson Moacir Becker Jr, Ênio Leandro Machado, Pâmela Andréa Mantey Dos Santos, Adriane de Assis Lawisch Rodriguez, and Diosnel Antonio Rodriguez Lopez. "Life Cycle Inventory and assessment of the municipal solid waste management system: a case study in a municipality in southern Brazil." LALCA: Revista Latino-Americana em Avaliação do Ciclo de Vida 2, no. 1 (2019): 91–121. http://dx.doi.org/10.18225/lalca.v2i1.3788.

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The present study conducted a Life Cycle Assessment evaluation of the Solid Waste Management System in Santa Cruz do Sul – RS, in order to provide background information and therefore support decision-making for future waste management scenarios. The software package named as Integrated Waste Management – 2, Version 2.5., was used to perform the LCA, where all inputs and waste management system outputs were identified and quantified. The conversion of the results from Life Cycle Inventory to Life Cycle Assessment in environmental impacts was carried out based on impact characterization factors

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Salameh, Thérèse, Stéphane Sauvage, Charbel Afif, et al. "Exploring the seasonal NMHC distribution in an urban area of the Middle East during ECOCEM campaigns: very high loadings dominated by local emissions and dynamics." Environmental Chemistry 12, no. 3 (2015): 316. http://dx.doi.org/10.1071/en14154.

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Environmental context Non-methane hydrocarbons play an important role in the formation of photochemical oxidants such as ozone. We investigate factors controlling the distribution of non-methane hydrocarbons in an urban area of the Middle East. The study highlights the importance of local emissions and atmospheric dynamics, and the limited effect of photochemistry at the measurement site. Abstract Measurements of over 70 C2-C16 non-methane hydrocarbons (NMHCs) were conducted in suburban Beirut (1.3 million inhabitants) in summer 2011 and winter 2012 during the Emission and Chemistry of Organic

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28

Marugán, Javier, Rafael van Grieken, Cristina Pablos, Cristina Adán, and Ruud Timmers. "Determination of Photochemical, Electrochemical and Photoelectrochemical Efficiencies in a Photoelectrocatalytic Reactor." International Journal of Chemical Reactor Engineering 11, no. 2 (2013): 787–97. http://dx.doi.org/10.1515/ijcre-2012-0014.

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Abstract The relation between the amount of incident photons, absorbed photons, oxidant species, reaction products and electrons in the external circuit should be analyzed individually to determine the step limiting the efficiency of the global photoelectrocatalytic processes. This work discusses the evaluation of three different titania electrodes for the oxidation of methanol in a photoelectrocatalytic reactor. The electrode prepared with three titania coating cycles shows a high efficiency in terms of photochemical (photons to product molecules), electrochemical (product molecules to electr

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Liu, Haoyu, Zhen Xu, Zhenyu Guo, et al. "A life cycle assessment of hard carbon anodes for sodium-ion batteries." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 379, no. 2209 (2021): 20200340. http://dx.doi.org/10.1098/rsta.2020.0340.

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Waste management is one of the biggest environmental challenges worldwide. Biomass-derived hard carbons, which can be applied to rechargeable batteries, can contribute to mitigating environmental changes by enabling the use of renewable energy. This study has carried out a comparative environmental assessment of sustainable hard carbons, produced from System A (hydrothermal carbonization (HTC) followed by pyrolysis) and System B (direct pyrolysis) with different carbon yields, as anodes in sodium-ion batteries (SIBs). We have also analysed different scenarios to save energy in our processes an

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Akmalina, Rifkah. "Environmental Impacts Evaluation of Sorbitol Production from Glucose." Eksergi 16, no. 1 (2019): 7. http://dx.doi.org/10.31315/e.v0i0.2695.

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A life cycle assessment (LCA) has been performed on sorbitol production from glucose, which aims to quantify and evaluate the environmental impacts that produced from the process. SuperPro Designer software was employed to perform the process simulation, while SimaPro was used to quantify the LCA.Potency of global warming, acidification, eutrophication, photochemical oxidants creation, abiotic depletion, and ozone layer depletion were evaluated. A gate-to-gate LCA study of sorbitol production showed that global warming potential (GWP) had the largest impact to environment with the value of 3.5

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Ylmén, Peter, Johanna Berlin, Kristina Mjörnell, and Jesper Arfvidsson. "Managing Choice Uncertainties in Life-Cycle Assessment as a Decision-Support Tool for Building Design: A Case Study on Building Framework." Sustainability 12, no. 12 (2020): 5130. http://dx.doi.org/10.3390/su12125130.

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To establish a circular economy in society, it is crucial to incorporate life-cycle studies, such as life-cycle assessment (LCA), in the design process of products in order to mitigate the well-recognized problem of the design paradox. The aim of the study was to provide means in a structured way to highlight choice uncertainty present in LCA when used as decision support, as well as to mitigate subjective interpretations of the numerical results leading to arbitrary decisions. The study focused on choices available when defining the goal and scope of a life-cycle assessment. The suggested app

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Hartini, Sri, Diana Puspitasari, Nabila Roudhatul Aisy, and Yusuf Widharto. "Eco-efficiency Level of Production Process of Waste Cooking Oil to be Biodiesel with Life Cycle Assessment." E3S Web of Conferences 202 (2020): 10004. http://dx.doi.org/10.1051/e3sconf/202020210004.

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Lack of awareness and knowledge of environmental protection, many people discard cooking oil waste. According to several studies, cooking oil waste can be processed into more valuable products through certain processes that require energy and material. Biodiesel is an example. Beside biodiesel, the production process also produces non-product output. Thus, efforts to utilize cooking oil waste into more valuable products also have a negative impact on the environment. This study aims to measure the environmental impact of biodiesel production from waste cooking oil and compare it if it is disch

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Fowler, David, Mhairi Coyle, Ute Skiba, et al. "The global nitrogen cycle in the twenty-first century." Philosophical Transactions of the Royal Society B: Biological Sciences 368, no. 1621 (2013): 20130164. http://dx.doi.org/10.1098/rstb.2013.0164.

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Global nitrogen fixation contributes 413 Tg of reactive nitrogen (N r ) to terrestrial and marine ecosystems annually of which anthropogenic activities are responsible for half, 210 Tg N. The majority of the transformations of anthropogenic N r are on land (240 Tg N yr −1 ) within soils and vegetation where reduced N r contributes most of the input through the use of fertilizer nitrogen in agriculture. Leakages from the use of fertilizer N r contribute to nitrate (NO 3 − ) in drainage waters from agricultural land and emissions of trace N r compounds to the atmosphere. Emissions, mainly of amm

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Angot, Hélène, Olivier Magand, Detlev Helmig, et al. "New insights into the atmospheric mercury cycling in central Antarctica and implications on a continental scale." Atmospheric Chemistry and Physics 16, no. 13 (2016): 8249–64. http://dx.doi.org/10.5194/acp-16-8249-2016.

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Abstract. Under the framework of the GMOS project (Global Mercury Observation System) atmospheric mercury monitoring has been implemented at Concordia Station on the high-altitude Antarctic plateau (75°06′ S, 123°20′ E, 3220 m above sea level). We report here the first year-round measurements of gaseous elemental mercury (Hg(0)) in the atmosphere and in snowpack interstitial air on the East Antarctic ice sheet. This unique data set shows evidence of an intense oxidation of atmospheric Hg(0) in summer (24-hour daylight) due to the high oxidative capacity of the Antarctic plateau atmosphere in t

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Fischer, Horst, Raoul Axinte, Heiko Bozem, et al. "Diurnal variability, photochemical production and loss processes of hydrogen peroxide in the boundary layer over Europe." Atmospheric Chemistry and Physics 19, no. 18 (2019): 11953–68. http://dx.doi.org/10.5194/acp-19-11953-2019.

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Abstract. Hydrogen peroxide (H2O2) plays a significant role in the oxidizing capacity of the atmosphere. It is an efficient oxidant in the liquid phase and serves as a temporary reservoir for the hydroxyl radical (OH), the most important oxidizing agent in the gas phase. Due to its high solubility, removal of H2O2 due to wet and dry deposition is efficient, being a sink of HOx (OH+HO2) radicals. In the continental boundary layer, the H2O2 budget is controlled by photochemistry, transport and deposition processes. Here we use in situ observations of H2O2 and account for chemical source and remo

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Zhou, Suping, Fur-Chi Chen, Samuel Nahashon, and Tingting Chen. "Cloning and Characterization of Glycolate Oxidase and NADH-Dependent Hydropyruvate Reductase Genes in Pachysandra terminalis." HortScience 41, no. 5 (2006): 1226–30. http://dx.doi.org/10.21273/hortsci.41.5.1226.

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Photorespiration provides a protection mechanism in plants by diverting excessive energy accumulated from photochemical reaction, metabolizing toxic products and producing some protective molecules. The authors report cloning and characterization of a glycolate oxidase gene (GOX; NCBI accession DQ442286) and a NADH-dependent hydroxypyruvate reductase gene (HPR; NCBI DQ442287) from Pachysandra terminallis. The DQ442286 had the predicted GOX-like–Riboflavin-5′-phosphate (FMN) conserved domain and the DQ442287 had the predicted adenosine 5′-(alpha-thio)diphospho-5′-ribofuranosylnicotinamide nicot

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Fleming, Z. L., P. S. Monks, A. R. Rickard, et al. "Seasonal dependence of peroxy radical concentrations at a northern hemisphere marine boundary layer site during summer and winter: evidence for photochemical activity in winter." Atmospheric Chemistry and Physics Discussions 6, no. 4 (2006): 7235–84. http://dx.doi.org/10.5194/acpd-6-7235-2006.

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Abstract. Peroxy radicals (HO2+ΣRO2) were measured at the Weybourne Atmospheric Observatory (52° N, 1° E), Norfolk using a PEroxy Radical Chemical Amplifier (PERCA) during the winter and summer of 2002. The peroxy radical diurnal cycles showed a marked difference between the winter and summer campaigns with maximum concentrations of 12 pptv at midday in the summer and maximum concentrations as high as 30 pptv (10 min averages) in winter at night. The corresponding nighttime peroxy radical concentrations were not as high in summer (3 pptv). The peroxy radical concentration shows a distinct anti

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Messant, Marine, Anja Krieger-Liszkay, and Ginga Shimakawa. "Dynamic Changes in Protein-Membrane Association for Regulating Photosynthetic Electron Transport." Cells 10, no. 5 (2021): 1216. http://dx.doi.org/10.3390/cells10051216.

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Photosynthesis has to work efficiently in contrasting environments such as in shade and full sun. Rapid changes in light intensity and over-reduction of the photosynthetic electron transport chain cause production of reactive oxygen species, which can potentially damage the photosynthetic apparatus. Thus, to avoid such damage, photosynthetic electron transport is regulated on many levels, including light absorption in antenna, electron transfer reactions in the reaction centers, and consumption of ATP and NADPH in different metabolic pathways. Many regulatory mechanisms involve the movement of

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Conley, S. A., I. Faloona, G. H. Miller, D. H. Lenschow, B. Blomquist, and A. Bandy. "Closing the dimethyl sulfide budget in the tropical marine boundary layer during the Pacific Atmospheric Sulfur Experiment." Atmospheric Chemistry and Physics 9, no. 22 (2009): 8745–56. http://dx.doi.org/10.5194/acp-9-8745-2009.

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Abstract. Fourteen research flights were conducted with the National Center for Atmospheric Research (NCAR) C-130 near Christmas Island (2° N, 157° W) during the summer of 2007 as part of the Pacific Atmospheric Sulfur Experiment (PASE). In order to tightly constrain the scalar budget of DMS, vertical eddy fluxes were measured at various levels in the marine boundary layer (MBL) from ~30 m to the top of the mixed layer (~500 m) providing improved accuracy of the flux divergence calculation in the DMS budget. The observed mean mole fraction of DMS in the MBL exhibited the well-known diurnal cyc

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Li, Haiyan, Matthieu Riva, Pekka Rantala, et al. "Terpenes and their oxidation products in the French Landes forest: insights from Vocus PTR-TOF measurements." Atmospheric Chemistry and Physics 20, no. 4 (2020): 1941–59. http://dx.doi.org/10.5194/acp-20-1941-2020.

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Abstract. The capabilities of the recently developed Vocus proton-transfer-reaction time-of-flight mass spectrometer (PTR-TOF) are reported for the first time based on ambient measurements. With the deployment of the Vocus PTR-TOF, we present an overview of the observed gas-phase (oxygenated) molecules in the French Landes forest during summertime 2018 and gain insights into the atmospheric oxidation of terpenes, which are emitted in large quantities in the atmosphere and play important roles in secondary organic aerosol production. Due to the greatly improved detection efficiency compared to

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Conley, S. A., I. Faloona, G. H. Miller, B. Blomquist, D. Lenschow, and A. Bandy. "Closing the Dimethyl Sulfide Budget in the Tropical Marine Boundary Layer during the Pacific Atmospheric Sulfur Experiment." Atmospheric Chemistry and Physics Discussions 9, no. 4 (2009): 17265–96. http://dx.doi.org/10.5194/acpd-9-17265-2009.

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Abstract. Fourteen research flights were conducted with the National Center for Atmospheric Research (NCAR) C-130 near Christmas Island (2° N, 157° W) during the summer of 2007 as part of the Pacific Atmospheric Sulfur Experiment (PASE). In order to tightly constrain the scalar budget of DMS, fluxes were measured at various levels in the marine boundary layer (MBL) from near the surface (30 m) to the top of the mixed layer (500 m) providing greater accuracy of the flux divergence calculation in the DMS budget. The observed mean mole fraction of DMS in the MBL exhibited the well known diurnal c

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Steffen, A., T. Douglas, M. Amyot, et al. "A synthesis of atmospheric mercury depletion event chemistry in the atmosphere and snow." Atmospheric Chemistry and Physics 8, no. 6 (2008): 1445–82. http://dx.doi.org/10.5194/acp-8-1445-2008.

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Abstract. It was discovered in 1995 that, during the spring time, unexpectedly low concentrations of gaseous elemental mercury (GEM) occurred in the Arctic air. This was surprising for a pollutant known to have a long residence time in the atmosphere; however conditions appeared to exist in the Arctic that promoted this depletion of mercury (Hg). This phenomenon is termed atmospheric mercury depletion events (AMDEs) and its discovery has revolutionized our understanding of the cycling of Hg in Polar Regions while stimulating a significant amount of research to understand its impact to this fra

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Steffen, A., T. Douglas, M. Amyot, et al. "A synthesis of atmospheric mercury depletion event chemistry linking atmosphere, snow and water." Atmospheric Chemistry and Physics Discussions 7, no. 4 (2007): 10837–931. http://dx.doi.org/10.5194/acpd-7-10837-2007.

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Abstract. It was discovered in 1995 that, during the spring time, unexpectedly low concentrations of gaseous elemental mercury (GEM) occurred in the Arctic air. This was surprising for a pollutant known to have a long residence time in the atmosphere; however conditions appeared to exist in the Arctic that promoted this depletion of mercury (Hg). This phenomenon is termed atmospheric mercury depletion events (AMDEs) and its discovery has revolutionized our understanding of the cycling of Hg in Polar Regions while stimulating a significant amount of research to understand its impact to this fra

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Aiman, Venessa Allia, Mochammad Chaerul, and Benno Rahardyan. "Life cycle assessemnt (LCA) study of a milk powder product in aluminium foil packaging." Indonesian Journal of Life Cycle Assessment and Sustainability, April 10, 2019. http://dx.doi.org/10.52394/ijolcas.v2i1.69.

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Dairy processing industry is one of the industries that give positive contribution to the economic growth, however it also contributes in many impacts on the environment, as well as milk powder product manufactured by PT X. The main objective of this study was to determine the most significant environmental impact caused by production and transportation of milk powder in bag 250 gram (Product X) using Life Cycle Assessment (LCA) methodology. The boundary of the LCA study is “cradle to gate”, including: materials production, materials transportation from supplier to the PT X factory, manufactur

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Hu, Yanbo, Wei Xie, and Baodong Chen. "Arbuscular mycorrhiza improved drought tolerance of maize seedlings by altering photosystem II efficiency and the levels of key metabolites." Chemical and Biological Technologies in Agriculture 7, no. 1 (2020). http://dx.doi.org/10.1186/s40538-020-00186-4.

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Abstract Background Water shortage can limit plant growth, which can be ameliorated by arbuscular mycorrhizal (AM) symbiosis through physiological and metabolic regulations. Deciphering which physiological and metabolic processes are central for AM-mediated regulations is essential for applications of mycorrhizal biotechnology in dryland agriculture. Methodology In this study, the influence of AM symbiosis on growth performance, photosynthesis, and organ accumulation of key C and N metabolites were assessed by growing maize (Mo17, Lancaster Sure Crop) seedlings inoculated with or without AM fu

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