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Author : Andrew Philip Rutter
Publisher :
ISBN 13 :
Total Pages : 242 pages
Book Rating : 4.:/5 (89 download)
Download or read book Field and Laboratory Studies of Atmospheric Reactive Mercury written by Andrew Philip Rutter and published by . This book was released on 2007 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : W. H. Schroeder
Publisher :
ISBN 13 :
Total Pages : 132 pages
Book Rating : 4.:/5 (11 download)
Download or read book Inter-laboratory Testing and Comparison of Two Types of Atmospheric Mercury Monitors written by W. H. Schroeder and published by . This book was released on 1981 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 82 pages
Book Rating : 4.:/5 (11 download)
Download or read book Inter-laboratory Testing and Comparison of Two Types of Atmospheric Mercury Monitors written by and published by . This book was released on 1981 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Robert W. Talbot
Publisher : MDPI
ISBN 13 : 3038422908
Total Pages : 307 pages
Book Rating : 4.0/5 (384 download)
Download or read book Atmospheric Mercury written by Robert W. Talbot and published by MDPI. This book was released on 2018-09-27 with total page 307 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a printed edition of the Special Issue "Atmospheric Mercury" that was published in Atmosphere
Author : Deanna L. Donohoue
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (668 download)
Download or read book Kinetic Studies of the Oxidation Pathways of Gaseous Elemental Mercury written by Deanna L. Donohoue and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This work is the first direct measurement of a kinetic rate coefficient for these reactions, and the first work which employed one photon LIF to monitor the HgCl and HgBr products. The second aspect of this work was the development of new laser based techniques to detect atmospheric mercury and its oxidation products for both laboratory and field application. In this work a LIF technique was develop to detect HgCl and HgBr. In addition, a two photon LIF technique initially developed by Bauer et al., 2002 was verified and expanded. The two photon LIF technique was used to directly monitor Hg(0) atoms in-situ, to monitor Hg(0) evolving form a gold tube, and to monitor the Hg(0) evolving from the thermal decomposition of reactive gaseous mercury collected on a KCl coated or uncoated denuder. This work represents a significant advance in the development of a viable method the detect mercury and the mercury oxidation products in the laboratory and in the field and is the first study to observe clear differences in the characteristic desorption profiles of HgO and HgX2. This work has broad implications, it enhanced our current knowledge concerning the biogeochemical cycling of mercury, broadened our understanding of the mercury chemistry in high halogen environment, and provided new techniques which can be applied in future field and laboratory studies.
Author : Nicola Pirrone
Publisher : Springer Science & Business Media
ISBN 13 : 0387244948
Total Pages : 739 pages
Book Rating : 4.3/5 (872 download)
Download or read book Dynamics of Mercury Pollution on Regional and Global Scales written by Nicola Pirrone and published by Springer Science & Business Media. This book was released on 2005-12-12 with total page 739 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive overview of the different dynamic patterns involved in the redistribution of mercury in the global environment, and its impact on human health and ecosystems. Increasing mercury usage and the lack of emission control policy, especially in fast developing countries, represent a complex environmental and political issue that can only benefit from more accurate measurement.
Author : Guangliang Liu
Publisher : John Wiley & Sons
ISBN 13 : 1118146638
Total Pages : 435 pages
Book Rating : 4.1/5 (181 download)
Download or read book Environmental Chemistry and Toxicology of Mercury written by Guangliang Liu and published by John Wiley & Sons. This book was released on 2011-11-07 with total page 435 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides the fundamentals, recent developments, and future research needs for critical mercury transformation and transport processes, as well as the experimental methods that have been employed in recent studies. The coverage discusses the environmental behavior and toxicological effects of mercury on organisms, including humans, and provides case studies at the end of each chapter. Bringing together information normally spread across several books, this text is unique in covering the entire mercury cycle and providing a baseline for what is known and what uncertainties remain in respect to mercury cycling.
Author : Anders F. Jepsen
Publisher :
ISBN 13 :
Total Pages : 84 pages
Book Rating : 4.:/5 (318 download)
Download or read book Monitoring Mercury Vapor Near Pollution Sites written by Anders F. Jepsen and published by . This book was released on 1972 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Field and laboratory measurements were made to demonstrate that mercury vapor in the air near mercury-polluted water or sediment can be detected using an extremely sensitive detector, the Barringer Airborne Mercury Spectrometer. Areas were visited where the presence of mercury was known from fish, water, or sediment analyses; anomalous mercury levels ranging from 50 to more than 20,000 nanograms per cubic meter were detected. Anomalous concentrations of atomic mercury vapor in air may be classified as natural or man-made. Laboratory studies demonstrated that the mercury spectrometer is sensitive only to atomic mercury. By means of pyrolysis or combustion, organic compounds could be detected. To detect mercury pollution in water, pyrolysis appears necessary to convert combined mercury to the atomic state for measurement by rapid spectrophotometric techniques.
Author : Elizabeth Beaulieu Stumpner
Publisher :
ISBN 13 :
Total Pages : 270 pages
Book Rating : 4.:/5 (895 download)
Download or read book Reactive Inorganic Mercury written by Elizabeth Beaulieu Stumpner and published by . This book was released on 2014 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stannous-chloride-reducible divalent mercury, or 'reactive' mercury (Hg(II)R), is a methodologically defined Hg fraction that is increasingly being used as a surrogate measure of the Hg pool available for microbial Hg(II)-methylation. A critical examination of Hg(II)R stability was conducted in a set of experiments that examined techniques of sediment preservation and storage over time (0, 1, 7, 30, 90, 180, and in some cases 360 days), temperature (-80°C, -15°C, and 5°C), and with/without a glove bag that excluded atmospheric oxygen. A second set of experiments examined effects of field preservation, sediment homogenization and thaw time associated with samples previously preserved frozen. On the basis of experimental results, a recommended protocol is presented here for studies where Hg(II)R is a targeted analyte. (1) An oxidation-reduction probe should be used in the field to ensure the sampling area has similar redox conditions. (2) Samples may be collected in the field and transported to the lab in one of two ways; in Mason jars with no head space and placed on wet ice or collected in individual vials and placed on dry ice. (3) Based on statistical results, chilled samples should be analyzed immediately (within 1-2 days) or stored at -80°C for up to three months and frozen samples should be analyzed immediately (within 1-2 days). (4) Prior to analysis, frozen sample may be thawed sample 1-4 hours. (5) Compositing samples of variable redox status is not recommended. Sediment for the experiments was chosen from four distinct Hg-contaminated sites surrounding the Sacramento'San Joaquin Delta and San Francisco Bay. Sites were chosen based on legacy Hg contamination in the form of cinnabar (HgS) from past Hg mining impacted sites (Alviso Slough and Cache Creek sites), and elemental Hg from past gold mining sites (Cosumnes River and Humbug Creek (South Yuba River watershed). Samples were chosen with a wide range of organic content, oxidation-reduction conditions, and total reduced sulfur concentration because these properties are known to influence Hg(II)R concentration. Geochemical modeling conducted with PHREEQC indicated that the oxidation of aqueous sulfide plays an important role in controlling the saturation index of cinnabar, which has a direct effect on the solubility of Hg(II), and by extension an influence on the sediment Hg(II)R assay.
Author :
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (179 download)
Download or read book Investigating Atmospheric Mercury with the U.S. Geological Survey Mobile Mercury Laboratory written by and published by . This book was released on 2007 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : James Cizdziel
Publisher : MDPI
ISBN 13 : 3036507744
Total Pages : 142 pages
Book Rating : 4.0/5 (365 download)
Download or read book Atmospheric Mercury Monitoring, Analysis, and Chemistry written by James Cizdziel and published by MDPI. This book was released on 2021-04-28 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mercury is a toxic global contaminant that is transported through the atmosphere, is deposited in terrestrial and aquatic ecosystems, and concentrates up the food chain, reaching levels that can harm both humans and wildlife. This book reports the latest findings describing the distribution, deposition, and measurement of this airborne pollutant as well as the human and environmental impacts of artisanal mining of mercury and gold. The research originates from around the world and highlights the importance of atmospheric mercury research and the Minamata Convention on Mercury, a global treaty to protect human health and the environment from anthropogenic emissions of mercury.
Author : National Academies of Sciences, Engineering, and Medicine
Publisher : National Academies Press
ISBN 13 : 0309445655
Total Pages : 227 pages
Book Rating : 4.3/5 (94 download)
Download or read book The Future of Atmospheric Chemistry Research written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2017-01-29 with total page 227 pages. Available in PDF, EPUB and Kindle. Book excerpt: Our world is changing at an accelerating rate. The global human population has grown from 6.1 billion to 7.1 billion in the last 15 years and is projected to reach 11.2 billion by the end of the century. The distribution of humans across the globe has also shifted, with more than 50 percent of the global population now living in urban areas, compared to 29 percent in 1950. Along with these trends, increasing energy demands, expanding industrial activities, and intensification of agricultural activities worldwide have in turn led to changes in emissions that have altered the composition of the atmosphere. These changes have led to major challenges for society, including deleterious impacts on climate, human and ecosystem health. Climate change is one of the greatest environmental challenges facing society today. Air pollution is a major threat to human health, as one out of eight deaths globally is caused by air pollution. And, future food production and global food security are vulnerable to both global change and air pollution. Atmospheric chemistry research is a key part of understanding and responding to these challenges. The Future of Atmospheric Chemistry Research: Remembering Yesterday, Understanding Today, Anticipating Tomorrow summarizes the rationale and need for supporting a comprehensive U.S. research program in atmospheric chemistry; comments on the broad trends in laboratory, field, satellite, and modeling studies of atmospheric chemistry; determines the priority areas of research for advancing the basic science of atmospheric chemistry; and identifies the highest priority needs for improvements in the research infrastructure to address those priority research topics. This report describes the scientific advances over the past decade in six core areas of atmospheric chemistry: emissions, chemical transformation, oxidants, atmospheric dynamics and circulation, aerosol particles and clouds, and biogeochemical cycles and deposition. This material was developed for the NSF's Atmospheric Chemistry Program; however, the findings will be of interest to other agencies and programs that support atmospheric chemistry research.
Author : John R. Sabin
Publisher : Academic Press
ISBN 13 : 0080878059
Total Pages : 501 pages
Book Rating : 4.0/5 (88 download)
Download or read book Advances in Quantum Chemistry written by John R. Sabin and published by Academic Press. This book was released on 2011-09-06 with total page 501 pages. Available in PDF, EPUB and Kindle. Book excerpt: Approx.500 pagesApprox.500 pages
Author : Bullock, O. Russell
Publisher :
ISBN 13 :
Total Pages : 13 pages
Book Rating : 4.:/5 (424 download)
Download or read book Current Methods and Research Strategies for Modeling Atmospheric Mercury written by Bullock, O. Russell and published by . This book was released on 1999 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Arthur R. Austin
Publisher :
ISBN 13 :
Total Pages : 228 pages
Book Rating : 4.:/5 (149 download)
Download or read book Laboratory and Field Studies of the Distribution of Mercury Between Overlying Water and Deposits written by Arthur R. Austin and published by . This book was released on 1971 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Oak Ridge National Laboratory
Publisher :
ISBN 13 :
Total Pages : 580 pages
Book Rating : 4.3/5 (243 download)
Download or read book Review written by Oak Ridge National Laboratory and published by . This book was released on 1994 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Melissa Legrand
Publisher :
ISBN 13 :
Total Pages : 201 pages
Book Rating : 4.:/5 (252 download)
Download or read book Evaluation of Methodology for Mercury Exposure Assessment with Field and Laboratory Studies written by Melissa Legrand and published by . This book was released on 2005 with total page 201 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The threat of environmental mercury (Hg), particularly methylmercury (MeHg), exposure to the health of humans has been well documented. Thus, it is important to monitor exposure and body burden for public health protection. The first objective of this thesis was to characterize the risk of Hg exposure in two Canadian coastal communities: Grand Marian (n = 91) and St. Andrews/St. Stephen (n = 52), New Brunswick, Canada, using dietary questionnaires and hair analysis. Average Hg intakes and body burden were below the most conservative guidelines. We attributed these results to the low Hg concentrations found in the species commonly consumed: haddock, canned tuna, lobster and pollock (all below 0.2 mg/kg). The analytical method employed to determine Hg in hair, cold vapor atomic absorption (CV-AAS), required a bundle of 100-150 hair strands and involved lengthy chemical digestion procedures which reduce throughput. Direct solid introduction techniques minimize these weaknesses. Our second and third objectives were to evaluate two such methods: (1) combustion, gold amalgamation, atomic absorption spectrometry (C-GA-AAS) and (2) laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) for measuring total Hg in single hair strands. Hair samples with a wide range of Hg exposure were obtained from communities. A 1:1 relationship was observed between C-GA-AAS and the established CV-AAS for analysis of 1-cm hair segments. Additionally, the average relative standard deviation (RSD) of Hg between hair strands within an individual was 6.5 +/- 2.8%, thus justifying the use of a single hair strand for biomonitoring. With a limit of quantification of 0.10 ng of total Hg, a single hair strand with average weight of 0.5 mg and Hg concentrations of 0.2 mg/kg can be measured routinely. Using LA-ICP-MS, we showed that a single laser shot can sample hair material within 50 mum along a single hair strand which is equivalent to less than one day of" --
