Download or read book The Geochemistry of Radioactive Ground Water Within the Cambrian ordovician Aquifer System of Central Missouri written by Patricia Leigh Settles and published by . This book was released on 1989 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geochemistry of and Radioactivity in Ground Water of the Highland Rim and Central Basin Aquifer Systems Hickman and Maury Counties Tennessee written by Gregg Edward Hileman and published by . This book was released on 1993 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Groundwater Geochemistry and Radionuclide Activity in the Cambrian Ordovician Aquifer of Dodge and Fond Du Lac Counties Wisconsin written by Tamie R. Weaver and published by . This book was released on 1990 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Masters Theses in the Pure and Applied Sciences written by Wade H. Shafer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 421 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, and disseminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) * at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all con cerned if the printing and distribution of the volumes were handled by an interna tional publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Cor poration of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 34 (thesis year 1989) a total of 13,377 theses titles from 26 Canadian and 184 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this important annual reference work. While Volume 34 reports theses submitted in 1989, on occasion, certain univer sities do report theses submitted in previous years but not reported at the time.
Download or read book Groundwater Geochemistry and Radionuclide Activity in the Cambrian Ordovician Sandstone Aquifer of Dodge and Fond Du Lac Counties Wisconsin written by Tamie R. Weaver and published by . This book was released on 1988 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geochemical Factors Controlling Radium in the Cambrian Ordovician Aquifer System of Southeastern Wisconsin written by Michael Cape and published by . This book was released on 2003 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Publications of the Geological Survey written by Geological Survey (U.S.) and published by . This book was released on 1983 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geochemical Impacts on Radium Mobility in the Midwestern Cambrian Ordovician Aquifer System written by Madeleine Mathews and published by . This book was released on 2021 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Midwestern Cambrian-Ordovician aquifer system (MCOAS) covers a large portion of the Midwestern United States and is a major source for public and domestic water supply. Radium (Ra) is a contaminant frequently exceeding the EPA maximum contaminant level of 185 mBq/L (5 pCi/L) for combined [226]Ra and [228]Ra in the MCOAS. While elevated Ra is associated with low dissolved oxygen, old water, and elevated total dissolved solids in groundwater at the aquifer scale, it is difficult to predict elevated Ra occurrence at individual wells. This dissertation uses field and laboratory methods to examine the geochemical influences on Ra mobility within the MCOAS, to gain insight into the influence of local hydrogeology on Ra partitioning to the groundwater. Multiple factors impact Ra sources and mobility in the MCOAS at the local scale; at discrete intervals within the aquifer system, elevated total dissolved solids are related to elevated Ra in an unconfined aquifer, while low dissolved oxygen is related to elevated Ra in a confined aquifer. Local geochemical conditions control Ra sorption to rock, as determined by whole-rock parent-daughter isotope ratios and sequential extractions on representative MCOAS bedrock samples. Potential hydrologic flow from Ra-rich stratigraphy to stratigraphy with lower sorptive capacity may result in increased Ra mobility within the MCOAS. The coupling of field and laboratory work compared the contribution of Ra from aquifer solids across specific stratigraphy. Isotopic evidence ([226]Ra/[238]U) demonstrates radionuclide mobility, where geochemical influences (e.g., ORP, alkalinity) likely influence U partitioning within the system. Additionally, Ra concentrations during a short-term pumping test are shown to be consistent with trends on 1-year timeframe, although the analytical method for Ra is important to verify trend precision. The larger implications of this project are that the presence of parent nuclides, as well as local geochemical and hydrologic conditions are important to consider in terms of predicting where elevated Ra will occur in groundwater samples. This approach provides new insight into how water-rock interactions within specific stratigraphy contribute Ra to the aqueous system within the MCOAS.
Download or read book Geochemistry of and Radioactivity in Ground Water of the Highland Rim and Central Basin Aquifer Systems Hickman and Maury Counties Tennessee written by Gregg Edward Hileman and published by . This book was released on 1993 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hydrogeochemical Changes Impacting Radium Activity in the Midwestern Cambrian Ordovician Aquifer System written by Amy K. Wiersma and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Midwestern Cambrian-Ordovician aquifer system (MCOAS) is a valuable source of drinking water in the North Central United States, but can contain elevated levels of naturally occurring radium (Ra). Long-term consumption of Ra in drinking water is linked to an increased risk of bone cancer, and is therefore federally regulated in the U.S. at 185 millibecquerels per liter (mBq/L) or 5 picocuries per liter (pCi/L) for the total of 226Ra and 228Ra. While the hydrogeochemical conditions associated with elevated activity Ra in the MCOAS are well documented, less is known about how Ra occurrence is affected due to hydrogeochemical changes initiated by natural and anthropogenic aspects. This dissertation uses field and modeling studies to explore Ra occurrence when hydrogeochemical change is instigated by factors including natural hydrogeologic conditions, release of organic contaminants to the subsurface, and well field management. Radium activity increases as groundwater evolves along a regional flow path and approaches the boundary of the Maquoketa shale, a regional confining unit; here, the aquifer becomes locally confined and groundwater is older with geochemical conditions conducive to Ra mobility, including low dissolved oxygen and elevated total dissolved solids (TDS). A complex organic chemical mixture released to the subsurface alters aquifer pH, redox, and TDS conditions, resulting in elevated Ra activity within the dissolved phase plume that highlights the importance of characterizing Ra at hydrocarbon-contaminated sites. As demonstrated by groundwater flow modeling, well construction and pumping rates can alter hydraulic gradients that enhance groundwater exchange between units of different geochemistry and modify the contribution of groundwater from stratigraphic units with different Ra activity to wells. Overall, this dissertation provides insight into how environmental and anthropogenic factors influence hydrogeochemical conditions and Ra occurrence in groundwater, and can help guide long-term groundwater management strategies for mitigating Ra activity in groundwater pumped from the MCOAS.
Download or read book Hydrogeologic and Geochemical Studies of Selected Natural Radioisotopes and Barium in Groundwater in Illinois written by Robert H. Gilkeson and published by . This book was released on 1983 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hydrology and water quality at the Weldon Spring radioactive waste disposal sites St Charles County Missouri written by Michael J. Kleeschulte and published by . This book was released on 1987 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Progress Report on Determining the Effects of Pumping from the Cambrian Ordovician Aquifer in the Audrain County Area Missouri written by Robert D. Knight and published by . This book was released on 1979* with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Symposium on Geochemistry of Groundwater written by and published by Elsevier. This book was released on 1982-01-01 with total page 381 pages. Available in PDF, EPUB and Kindle. Book excerpt: Symposium on Geochemistry of Groundwater
Download or read book Scientific Investigations Report written by S. S. Sumioka and published by . This book was released on 2004 with total page 60 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 1988 with total page 1064 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geochemistry of the Madison and Minnelusa Aquifers in the Black Hills Area South Dakota written by Cheryl A. Naus and published by . This book was released on 2001 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
