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Development Of Particulate Matter Mass Measurement Methods For Atmospheric Air Quality Monitoring And Very Low Vehicle Emissions
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Book Synopsis Development of Particulate Matter Mass Measurement Methods for Atmospheric Air Quality Monitoring and Very Low Vehicle Emissions by : Liem T. Pham
Download or read book Development of Particulate Matter Mass Measurement Methods for Atmospheric Air Quality Monitoring and Very Low Vehicle Emissions written by Liem T. Pham and published by . This book was released on 2017 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: The public raises concerns about the exposure to particulate matter (PM) which has been strongly associated with illness and mortality. However, most of the studies relied on the measurements from stationary monitoring sites, which cannot capture the actual PM exposure for those at or near the source. In this study, both stationary and comprehensive mobile monitoring platforms were developed to measure PM concentration and traffic conditions on some major highways in Southern California. The main objective is to develop a set of alternative metrics that measure particle concentrations as well as particle size. Measurement of particle size distributions are useful but doing so to monitor a wide region is not practical. The use of a particle counter and a diffusion charger was investigated as a relatively simple means to measure spatiotemporally-resolved particle concentrations over a wide region using a mobile platform. While the condensation particle counter and electrical aerosol detector respectively measure particle number and particle active surface area concentrations, the ratio of surface area over number provides an additional information of particle size which is important for particle transport. Particle size distributions measured by scanning mobility particle sizer during ambient monitoring were used to verify the concept. The study found that alternative metrics (number, surface area, and ratio of surface area over number) can be used to monitor spatiotemporally resolved particle concentrations over a wide region. Gravimetric sampling methods on a chassis dynamometer were studied in accordance to Code of Federal Regulations. This study evaluated commercially available partial flow dilutors with a focus on their equivalency with the standard constant volume sampler system and the ability to provide reproducible measurements at low PM emission levels. As PM standards for light-duty vehicles are becoming more stringent, improving the confidence and understanding the mass measurement methods become one of the main goals for the industry and regulatory agencies. Simultaneous testing was conducted with three partial flow dilutors over the Federal Test Procedure and US06 drive cycles. The Federal Test Procedure had means that were statistically different for two of the three partial flow dilutors. As for the US06 tests, the mean differences were not statistically different. The performance of all partial flow dilutors also showed repeatable and accurate level of proportionality, which could easily meet the Code of Federal Regulations 1066 and 1065 requirements for all tests performed.
Book Synopsis Measurement and Control of Particulate Matter Emissions from Mobile Sources by : David Christopher Quiros
Download or read book Measurement and Control of Particulate Matter Emissions from Mobile Sources written by David Christopher Quiros and published by . This book was released on 2014 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt: Controlling mobile source emissions is a key strategy for reducing ambient particulate matter (PM) emissions and to comply with the National Ambient Air Quality Standards (NAAQS). The California Air Resources Board (ARB) has adopted new regulations, strengthened existing regulations, and implemented control programs for reducing emissions of PM from light-duty vehicles (LDV) and heavy-duty diesel trucks (HDDT). Since model year (MY) 2007, all HDDTs are certified to a stringent PM emissions standard of 0.01 g PM per brake-horsepower-hour using diesel particulate filter (DPF) aftertreatment. Recently, ARB adopted the Low Emission Vehicle (LEV) III regulations, which will reduce the PM emissions for LDVs over the Federal Test Procedure (FTP) to 3 mg/mi beginning with MY 2017, and to 1 mg/mi beginning with MY 2025. This dissertation discusses and investigates some of the key issues for reducing PM emissions from both HDDTs and LDVs. It is subdivided into the following five chapters: an introduction (Chapter 1), three chapters of original research (Chapters 2-4), and a discussion of the implications and conclusions of the work (Chapter 5). Chapter 2 evaluates PM emissions during a process called diesel particulate filter (DPF) regeneration, which is the periodic oxidization of accumulated soot into mostly carbon dioxide. The PM emissions released during this process are noteworthy and need to be controlled. However, the total PM emissions, following equal treatments of loading, decreased by over an order of magnitude between the MY 2007 and 2010 HDDT. Chapters 3 and 4 evaluate particle size distribution, effective density, and an alternative method called Integrated Particle Size Distribution (IPSD) to further support measurement of PM from vehicles emitting below 1 mg/mi. The evaluation of the IPSD method provided a better understanding of the variability of PM emissions of vehicles meeting the LEV III standards. The implementation of the 1 mg/mi standard is currently scheduled to begin with MY 2025 vehicles, and serves to prevent emissions backsliding associated with the introduction of newer and more fuel-efficient engine designs that could result in excess PM emissions. At the time of filing, Chapter 2 has been published in the Journal of Aerosol Science (JAS), Chapter 3 has been submitted to JAS, and Chapter 4 is in preparation for submission to Environmental Science & Technology.
Book Synopsis Particulate Matter Mass Measurement and Physical Characterization by :
Download or read book Particulate Matter Mass Measurement and Physical Characterization written by and published by . This book was released on 2004 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Monitoring, Control and Effects of Air Pollution by : Andrzej Chmielewski
Download or read book Monitoring, Control and Effects of Air Pollution written by Andrzej Chmielewski and published by BoD – Books on Demand. This book was released on 2011-08-23 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book addresses the subjects related to the selected aspects of pollutants emission, monitoring and their effects. The most of recent publications concentrated on the review of the pollutants emissions from industry, especially power sector. In this one emissions from opencast mining and transport are addressed as well. Beside of SOx and NOx emissions, small particles and other pollutants (e.g. VOC, ammonia) have adverse effect on environment and human being. The natural emissions (e.g. from volcanoes) has contribution to the pollutants concentration and atmospheric chemistry governs speciation of pollutants, as in the case of secondary acidification. The methods of ambient air pollution monitoring based on modern instrumentation allow the verification of dispersion models and balancing of mass emissions. The comfort of everyday human's activity is influenced by indoor and public transport vehicles interior air contamination, which is effected even by the professional appliances operation. The outdoor pollution leads to cultural heritage objects deterioration, the mechanism are studied and the methods of rehabilitation developed. However to prevent emissions the new technologies are being developed, the new class of these technologies are plasma processes, which are briefly reviewed at the final part of the book.
Book Synopsis Chemistry of the Upper and Lower Atmosphere by : Barbara J. Finlayson-Pitts
Download or read book Chemistry of the Upper and Lower Atmosphere written by Barbara J. Finlayson-Pitts and published by Elsevier. This book was released on 1999-11-17 with total page 993 pages. Available in PDF, EPUB and Kindle. Book excerpt: Here is the most comprehensive and up-to-date treatment of one of the hottest areas of chemical research. The treatment of fundamental kinetics and photochemistry will be highly useful to chemistry students and their instructors at the graduate level, as well as postdoctoral fellows entering this new, exciting, and well-funded field with a Ph.D. in a related discipline (e.g., analytical, organic, or physical chemistry, chemical physics, etc.). Chemistry of the Upper and Lower Atmosphere provides postgraduate researchers and teachers with a uniquely detailed, comprehensive, and authoritative resource. The text bridges the "gap" between the fundamental chemistry of the earth's atmosphere and "real world" examples of its application to the development of sound scientific risk assessments and associated risk management control strategies for both tropospheric and stratospheric pollutants. - Serves as a graduate textbook and "must have" reference for all atmospheric scientists - Provides more than 5000 references to the literature through the end of 1998 - Presents tables of new actinic flux data for the troposphere and stratospher (0-40km) - Summarizes kinetic and photochemical date for the troposphere and stratosphere - Features problems at the end of most chapters to enhance the book's use in teaching - Includes applications of the OZIPR box model with comprehensive chemistry for student use
Download or read book Air Pollution written by Jeremy Colls and published by CRC Press. This book was released on 2009-09-10 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt: A one stop, comprehensive textbook, covering the three essential components of air pollution science. The Third Edition has been updated with the latest developments, especially the inclusion of new information on the role of air pollutants in climate change. The authors give greater coverage to the developing economies around the world where air pollution problems are on the rise. The Third Edition continues to cover a wide range of air quality issues, retaining a quantitative perspective. Topics covered include - gaseous and particulate air pollutants, measurement techniques, meteorology and dispersion modelling, mobile sources, indoor air, effects on plants, materials, humans and animals. Moving away from classical toxic air pollutants, there is a chapter on climate change and another on the depletion of stratospheric ozone. A special feature of this new edition is the inclusion of a fresh chapter on air pollution mitigation by vegetation, mainly its role in maintaining a sustainable urban environment. Recommended for upper-level undergraduate and postgraduate courses specialising in air pollution, both for environmental scientists and engineers. The new material included in the Third Edition extends its use by practitioners in consultancies or local authorities.
Author :National Center for Environmental Assessment (Research Triangle Park, N.C.) Publisher : ISBN 13 : Total Pages :1100 pages Book Rating :4.3/5 ( download)
Book Synopsis Air Quality Criteria for Particulate Matter by : National Center for Environmental Assessment (Research Triangle Park, N.C.)
Download or read book Air Quality Criteria for Particulate Matter written by National Center for Environmental Assessment (Research Triangle Park, N.C.) and published by . This book was released on 1996 with total page 1100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fine Particle (2.5 microns) Emissions by : John D. McKenna
Download or read book Fine Particle (2.5 microns) Emissions written by John D. McKenna and published by John Wiley & Sons. This book was released on 2008-09-17 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research has shown that inhaling fine particles is a greater health risk than breathing larger particles. Title is "very timely...needed NOW," according to one reviewer Covers a "controversial" but important topic, for which there is a lack of literature and hence guidance for those professionals affected by it Covers legislative background and gives insight into regulatory and technical matters such as measurement and control of fine particle emissions Combines the practical, theoretical, and regulatory areas of fine particulate monitoring, with "reference to the regulated community" Written by a recognized authority with over 30 years of pollution control experience
Book Synopsis Measurement of Airborne Pollutants by : Suzanne Couling
Download or read book Measurement of Airborne Pollutants written by Suzanne Couling and published by Elsevier. This book was released on 2015-12-04 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: Measurement of Airborne Pollutants stresses the importance of developing air pollution measurements that is central to progress in the formulation of environmental policy, efficient regulation of emissions, and satisfactory control of processes which emit pollutants into the atmosphere. This book is divided into two parts. Part 1 deals with the operational evaluations of emerging techniques for ambient measurements of airborne particles and for low levels of nitrogen dioxide. The calibration techniques for automatic analyses or for gas cylinders obtained from commercial suppliers and fundamental issues in the measurement of acid deposition are also deliberated. The assessment of air pollution sources that includes analyzing dioxins and furans at sub-nanogram levels and particle or dust source assessments through dust deposit and particle flux gauges are described in Part 2. This publication is valuable to environmental scientists and researchers concerned with air pollution measurements.
Book Synopsis Particulate Matter Science for Policy Makers by : Peter H. McMurry
Download or read book Particulate Matter Science for Policy Makers written by Peter H. McMurry and published by Cambridge University Press. This book was released on 2004-11-29 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt: Particulate Matter Science for Policy Makers: A NARSTO Assessment was commissioned by NARSTO, a cooperative public-private sector organization of Canada, Mexico and the United States. It is a concise and comprehensive discussion of the current understanding by atmospheric scientists of airborne particulate matter (PM). Its goal is to provide policy makers who implement air-quality standards with this relevant and needed scientific information. The primary audience for this volume will be regulators, scientists, and members of industry, all of whom have a stake in effective PM management. It will also inform exposure and health scientists, who investigate causal hypotheses of health impacts, characterize exposure, and conduct epidemiological and toxicological studies.
Book Synopsis Atmospheric Chemistry and Physics by : John H. Seinfeld
Download or read book Atmospheric Chemistry and Physics written by John H. Seinfeld and published by John Wiley & Sons. This book was released on 2012-12-18 with total page 1249 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thoroughly restructured and updated with new findings and new features The Second Edition of this internationally acclaimed text presents the latest developments in atmospheric science. It continues to be the premier text for both a rigorous and a complete treatment of the chemistry of the atmosphere, covering such pivotal topics as: * Chemistry of the stratosphere and troposphere * Formation, growth, dynamics, and properties of aerosols * Meteorology of air pollution * Transport, diffusion, and removal of species in the atmosphere * Formation and chemistry of clouds * Interaction of atmospheric chemistry and climate * Radiative and climatic effects of gases and particles * Formulation of mathematical chemical/transport models of the atmosphere All chapters develop results based on fundamental principles, enabling the reader to build a solid understanding of the science underlying atmospheric processes. Among the new material are three new chapters: Atmospheric Radiation and Photochemistry, General Circulation of the Atmosphere, and Global Cycles. In addition, the chapters Stratospheric Chemistry, Tropospheric Chemistry, and Organic Atmospheric Aerosols have been rewritten to reflect the latest findings. Readers familiar with the First Edition will discover a text with new structures and new features that greatly aid learning. Many examples are set off in the text to help readers work through the application of concepts. Advanced material has been moved to appendices. Finally, many new problems, coded by degree of difficulty, have been added. A solutions manual is available. Thoroughly updated and restructured, the Second Edition of Atmospheric Chemistry and Physics is an ideal textbook for upper-level undergraduate and graduate students, as well as a reference for researchers in environmental engineering, meteorology, chemistry, and the atmospheric sciences. Click here to Download the Solutions Manual for Academic Adopters: http://www.wiley.com/WileyCDA/Section/id-292291.html
Book Synopsis Evaluation of Mobile Source Emissions and Trends by : Timothy Ryan Dallmann
Download or read book Evaluation of Mobile Source Emissions and Trends written by Timothy Ryan Dallmann and published by . This book was released on 2013 with total page 153 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mobile sources contribute significantly to air pollution problems. Relevant pollutants include numerous gaseous and particle-phase species that can affect human health, ecosystems, and climate. Accurate inventories of emissions from these sources are needed to help understand possible adverse impacts, and to develop effective air quality management strategies. Unfortunately large uncertainties persist in the understanding of mobile source emissions, and how these emissions are changing over time. There are more than two hundred million motor vehicles operating in the United States alone, and measurements of emissions from these sources are sparse. Pollutant emission factor distributions are becoming increasingly skewed, and this continually increases the needed vehicle sample size in studies that seek to quantify fleet-average vehicle emission rates. This dissertation aims to evaluate long-term trends in mobile source emissions in the United States, and to make detailed measurements of emissions from present-day fleets of on-road vehicles operating in California. Novel features of this work include studies of the in-use effectiveness of modern control technologies used to reduce diesel engine emissions, and application of advanced instrumentation to measure emissions from large numbers of on-road gasoline and diesel vehicles at high time resolution and with a high level of chemical and physical detail. Long-term trends in mobile source emissions of nitrogen oxides (NOx) and fine particulate matter (PM2.5) in the United States were investigated through development of a fuel-based emission inventory. Annual emissions from on- and off-road gasoline and diesel engines were quantified for the years 1996-2006. Diesel engines were found to be the dominant mobile source of NOx and PM2.5, and on-road diesel vehicles were identified as the single largest anthropogenic source of NOx emissions in the United States as of 2005. The relative importance of diesel engines as a source of NOx grew over the ten-year time period considered here, while emissions from gasoline engines declined due to increased effectiveness and use of three-way catalytic converters. A comparison with national emission inventory estimates for 2005 found substantial differences in source contributions to overall mobile source emissions, with larger contributions from on-road diesel engines indicated in this study. The importance of diesel engines as a source of exhaust particulate matter emissions has led to the recent introduction of advanced emission control technologies in the United States, such as diesel particle filters (DPF), which have been required since 2007 for all new on-road heavy-duty (HD) diesel engines. In addition to national requirements for the use of such control devices on new engines, California has mandated accelerated clean-up of statewide emissions from older in-use diesel engines. This goal is to be achieved through filter retrofit and truck/engine replacement programs. This dissertation uses measurements of emissions from in-use HD diesel trucks at the Port of Oakland to evaluate the impacts of a DPF retrofit and truck replacement program. A plume capture method was developed to quantify black carbon (BC) and NOx emission factors for individual trucks and to characterize emission factor distributions. A comparison of emissions measured before and after the implementation of the truck retrofit/replacement rule shows a 54 " 11% reduction in the fleet-average BC emission factor, accompanied by a shift to a more highly skewed emission factor distribution. Although only particulate matter mass reductions were required in the first phase of the program, a 41 " 5% reduction in the fleet-average NOx emission factor was observed. These results provide an in-use/real-world assessment of the impact of DPF emission control systems, and a preview of emissions changes that may be expected from the extension of similar control programs to the entire HD truck fleet in California beginning in 2014. The plume capture method was further applied to measure emissions from a more diverse population of trucks observed at the Caldecott tunnel in summer 2010. Emissions from hundreds of individual trucks were measured, and emission factor distributions were characterized for nitric oxide (NO), nitrogen dioxide (NO2), carbon monoxide (CO), formaldehyde, BC, as well as optical properties of the emitted particles. Emission factor distributions for all species were skewed, with a small fraction of trucks contributing disproportionately to total emissions. For example, half of the total measured NO2 and BC were produced by only 10% of the total measurements. Total NOx and formaldehyde showed less skewed emission factor distributions compared to CO and BC. Emission factors for NO2 were found to be anti-correlated with all other pollutants considered here. Also, the fleet-average NO2 emission factor increased 34 " 18% relative to the corresponding value measured at the same location in 2006. These findings confirm that the use of catalyzed DPF systems is leading to increased primary NO2 emissions. Absorption and scattering cross-section emission factors were used to calculate the aerosol single scattering albedo (SSA, at 532 nm) for individual truck exhaust plumes, which averaged 0.14 " 0.03. This value of aerosol SSA is very low compared to typical values (0.90-0.99) observed in ambient air studies. It is indicative of a strongly light-absorbing aerosol, due to the high BC emissions that are a characteristic feature of diesel exhaust PM emissions. Measurements at the Caldecott tunnel also included efforts to quantify light-duty (LD) gasoline vehicle emission factors, and further investigation of the relative contributions of on-road gasoline and diesel engines to air pollutant emissions. Measurements of CO, NOx, PM2.5, BC, and organic aerosol (OA) were made in a tunnel traffic bore where LD vehicles account for>99% of total traffic. Measured pollutant concentrations were apportioned between LD gasoline vehicles and diesel trucks, and fleet-average emission factors were quantified for LD gasoline vehicles using a carbon balance method. Diesel trucks contributed 18 " 3, 22 " 5, 44 " 8% of measured NOx, OA, and BC concentrations, respectively, despite accounting for
Download or read book Particulates Matter written by Vikram Rao and published by Elsevier. This book was released on 2020-11-28 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: A title in the Emerging Issues in Analytical Chemistry series, Particulates Matter: Impact, Measurement, and Remediation of Airborne Pollutants provides the latest technical findings in the study of particulate matter (PM). It links these findings to awareness-raising and actionable schemes for legislated remediation and engineered solutions. Written in an engaging and informative manner, the book begins with a multi-disciplinary overview of the major sources and unique classes of PM, detection techniques, and their impact, including molecular changes resulting in health effects. It then goes one step further by proposing and examining the means to curtail and contain PM generation and ameliorate their impacts. Particulates Matter: Impact, Measurement, and Remediation of Airborne Pollutants offers a high-quality reference guide to PM that will greatly benefit technology leaders in environmental compliance groups, epidemiologists and other public health professionals focused on pollution and health, and researchers and scholars working in pollution, climate change, and urbanization. It may also be useful to advanced undergraduate and early graduate students in environmental sciences. - Includes a summary of the current knowledge on nanoparticles as pollutants and their negative health effects - Provides a framework for the evolution and maturation of air pollution characterization and mitigation - Describes an integrated set of engineered solutions that account for the concatenated relationships between technology, policy, and society necessary for long-term success
Book Synopsis Monitoring for Fine Particulate Matter by : Elisa Eiseman
Download or read book Monitoring for Fine Particulate Matter written by Elisa Eiseman and published by RAND Corporation. This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Particulate matter (PM)-dust, dirt, smoke, soot, and liquid droplets-comes from a variety of sources and is a mixture of many pollutants made up of several different chemical species. Recent evidence about health effects and the fundamental physical and chemical differences between fine and coarse PM prompted the EPA to set new standards. Monitoring to determine whether an area has met these standards requires a comprehensive approach that combines analytical techniques to assess mass and chemical composition with an integrated network of ambient and source PM monitors.
Book Synopsis Global Sources of Local Pollution by : National Research Council
Download or read book Global Sources of Local Pollution written by National Research Council and published by National Academies Press. This book was released on 2010-02-15 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent advances in air pollution monitoring and modeling capabilities have made it possible to show that air pollution can be transported long distances and that adverse impacts of emitted pollutants cannot be confined to one country or even one continent. Pollutants from traffic, cooking stoves, and factories emitted half a world away can make the air we inhale today more hazardous for our health. The relative importance of this "imported" pollution is likely to increase, as emissions in developing countries grow, and air quality standards in industrial countries are tightened. Global Sources of Local Pollution examines the impact of the long-range transport of four key air pollutants (ozone, particulate matter, mercury, and persistent organic pollutants) on air quality and pollutant deposition in the United States. It also explores the environmental impacts of U.S. emissions on other parts of the world. The book recommends that the United States work with the international community to develop an integrated system for determining pollution sources and impacts and to design effective response strategies. This book will be useful to international, federal, state, and local policy makers responsible for understanding and managing air pollution and its impacts on human health and well-being.
Book Synopsis Air Quality Monitoring and Advanced Bayesian Modeling by : Yongjie Li
Download or read book Air Quality Monitoring and Advanced Bayesian Modeling written by Yongjie Li and published by Elsevier. This book was released on 2023-01-14 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: Air Quality Monitoring and Advanced Bayesian Modeling introduces recent developments in urban air quality monitoring and forecasting. The book presents concepts, theories, and case studies related to monitoring methods of criteria air pollutants, advanced methods for real-time characterization of chemical composition of PM and VOCs, and emerging strategies for air quality monitoring. The book illustrates concepts and theories through case studies about the development of common statistical air quality forecasting models. Readers will also learn advanced topics such as the Bayesian model class selection, adaptive forecasting model development with Kalman filter, and the Bayesian model averaging of multiple adaptive forecasting models. - Covers fundamental to advanced applications of urban air quality monitoring and forecasting - Includes detailed descriptions and applications of the instruments necessary for the most successful monitoring techniques - Presents case studies throughout to provide real-world context to the research presented in the book
Download or read book Air Pollution Abstracts written by and published by . This book was released on 1972 with total page 666 pages. Available in PDF, EPUB and Kindle. Book excerpt:
