Download or read book Sources Transport and Fate of Mercury in San Francisco Estuary and Tributaries written by Christopher Hughes Conaway and published by . This book was released on 2005 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mercury Transport to San Francisco Bay Through the Sacramento San Joaquin River Delta written by and published by . This book was released on 2005 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: Between January 2002 and January 2005, water samples were collected at a downstream location of the Sacramento River, CA to quantify mercury concentrations and loads in surface runoff associated with large storm events and re-suspension of river sediments. Mercury concentrations ranged from 3.2 to 14 ng/L and showed a strong correlation to suspended sediment concentrations (SSC). The collection of continuous SSC measurements by U.S. Geological Survey at the study location allowed for extrapolation of the limited mercury data to estimate daily average total mercury loads. For the four years of monitoring in water years (WYs) 2002 - 2005, daily mercury loads ranged from 3 to 4,140 g, while annual mercury loads ranged from approximately 58 kg in WY 2002 to 110 kg in WY 2004. Results from this study have helped refine current estimates of mercury loads to the Bay from the Sacramento-San Joaquin River system. In the context of other significant transport pathways and numerical models, these refined estimates will further assist in understanding the long-term fate of mercury and the recovery of water quality of the Bay.

Download or read book A Mass Balance for Mercury in the San Francisco Bay Area written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We develop and illustrate a general regional multi-species model that describes the fate and transport of mercury in three forms, elemental, divalent, and methylated, in a generic regional environment including air, soil, vegetation, water and sediment. The objectives of the model are to describe the fate of the three forms of mercury in the environment and determine the dominant physical sinks that remove mercury from the system. Chemical transformations between the three groups of mercury species are modeled by assuming constant ratios of species concentrations in individual environmental media. They illustrate and evaluate the model with an application to describe the fate and transport of mercury in the San Francisco Bay Area of California. The model successfully rationalizes the identified sources with observed concentrations of total mercury and methyl mercury in the San Francisco Bay Estuary. The mass balance provided by the model indicates that continental and global background sources control mercury concentrations in the atmosphere but loadings to water in the San Francisco Bay estuary are dominated by runoff from the Central Valley catchment and re-mobilization of contaminated sediments deposited during past mining activities. The model suggests that the response time of mercury concentrations in the San Francisco Bay estuary to changes in loadings is long, of the order of 50 years.

Download or read book Reviews of Environmental Contamination and Toxicology 194 written by David M. Whitacre and published by Springer Science & Business Media. This book was released on 2007-11-24 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reviews of Environmental Contamination and Toxicology provides concise, critical reviews of timely advances, philosophy and significant areas of accomplished or needed endeavor in the total field of xenobiotics, in any segment of the environment, as well as toxicological implications. It covers all aspects of environmental contamination and associated toxicological consequences as well as facilitates the task of accessing and interpreting cogent scientific data.

Download or read book Quellen und Forschungen zur Geschichte und Landeskunde des Kantons Baselland written by and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Riverine Transport of Sediment and Mercury to North San Francisco Bay written by and published by . This book was released on 2006 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1991 with total page 882 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mercury as a Global Pollutant written by Donald B. Porcella and published by Springer. This book was released on 2014-08-23 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: ACKNOWLEDGEMENTS xiv PART I MERCURY AND HUMAN HEALTH B. WHEATLEY and S. PARADIS I Exposure of Canadian Aboriginal Peoples to Methylmercury 3-11 M. GIRARD and C. DUMONT I Exposure of James Bay Cree to Methylmercury during Pregnancy for the Years 1983-91 13-19 M. RICHARDSON, M. MITCHELL, S. COAD and R. RAPHAEL I Exposure to Mercury in Canada: A Multimedia Analysis 21-30 M. RICHARDSON, M. EGYED and D. J. CURRIE I Human Exposure to Mercury may Decrease as Acidic Deposition Increases 31-39 L. E. FLEMING, S. WATKINS, R. KADERMAN, B. LEVIN, D. R. AVYAR, M. BIZZIO, D. STEPHENS and J. A. BEAN I Mercury Exposure in Humans through Food Consumption from the Everglades of Florida 41-48 J. M. GEARHART, H. J. CLEWELL III, K. S. CRUMP, A. M. SHIPP and A. SILVERS I Pharmacokinetic Dose Estimates of Mercury in Children and Dose-Response Curves of Performance Tests in a Large Epidemiological Study 49-58 I. SKARE I Mass Balance and Systemic Uptake of Mercury Released from Dental Amalgam Fillings 59-67 J. DELLINGER, N. KMIECIK, S. GERSTENBERGER and H. NGU I Mercury Contamina tion of Fish in the Ojibwa Diet: I. Walleye Fillets and Skin-On versus Skin-Off Sampling 69-76 J. DELLINGER, L. MALEK and M. BEATTIE I Mercury Contamination of Fish in the Ojibwa Diet: II. Sensory Evoked Responses in Rats Fed Walleye 77-83 H. AKAGI, O. MALM, F. J. P. BRANCHES, Y. KINJO, Y. KASHIMA, J. R. D. GUIMARAES, R. B. OLIVEIRA, K. HARAGUCHI, W. C. PFEIFFER, Y.

Download or read book Dissertation Abstracts International written by and published by . This book was released on 2006 with total page 942 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Water resources Investigations Report written by and published by . This book was released on 1999 with total page 860 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings and Summary Report written by and published by . This book was released on 2002 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Investigation of the Source Fate and Transport of Mercury in Hunza River Northern Areas Pakistan written by Kivanc Biber and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Mercury is one of the most hazardous and toxic elements with a high degree of mobility. Although it occurs naturally, anthropogenic activity can also release mercury to the environment. Globally, the use of mercury in gold mining has caused significant environmental pollution since Ancient Roman times. Small-scale gold mining activities along Hunza and Gilgit rivers are long known to be discharging mercury in the amalgamation and roasting processes. Previous studies reported high mercury concentrations in soils close to mining operations as well as serious health problems for miners. However, none of the studies have focused on the level of contamination in aqueous environments. This is the first study on the investigation on fluvial fate and transport of mercury in Hunza River. This research study aimed to investigate the source, fate and transport of river-borne mercury. Eleven (11) out of thirty-seven (37) river water samples showed higher dissolved mercury concentration than critical levels suggested by Environmental Protection Agency. These sites corresponded to the observed gold panning sites. Particulate mercury concentration was roughly three orders of magnitude higher than that of dissolved mercury per liter of water for all sampled rivers. Thus, suspended sediments represented the major pathway of mercury transport. A mass balance was performed to calculate annual mercury discharge to Hunza River basin. A conservative estimation resulted in 0.63 tonnes of annual mercury flux. This amount of mercury is difficult to result from anthropogenic discharge alone. An index based physical model was created to estimate mercury yield at sub-basin level. It was found that the dominant source of mercury is the mercury-rich soils upstream of Attabad Lake rather than the direct mercury release from mining activities. This result is supported by previous soil geochemistry data. Significant decrease in both dissolved and particulate-bound mercury concentration downstream of Attabad Lake suggested that mercury is being accumulated or consumed in the lake. Although minimization or elimination of mercury loses from mining process seems important for the well-being of the miners, preventing further accumulation of mercury in Attabad Lake would be a much more effective mean of mercury control in the region.

Download or read book Sediment remobilization of mercury in south San Francisco Bay California written by and published by DIANE Publishing. This book was released on with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mercury Effects Sources and Control Measures written by Alan B. Jones and published by . This book was released on 1996 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mercury Transport and Fate Through a Watershed written by and published by . This book was released on 2006 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Marine Research written by and published by . This book was released on 1973 with total page 1200 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Concentrations and Loads of Organic Contaminants and Mercury Associated with Suspended Sediment Discharged to San Francisco Bay from the Sacramento San Joaquin River Delta CA written by and published by . This book was released on 2005 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt: