Download or read book Dissolution kinetics of natural calcite minerals in CO2 water systems approaching calcite equilibrium written by U. Svensson and published by . This book was released on 1992 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Calcite Dissolution Kinetics at the Sediment water Interface in an Acidifying Ocean written by Olivier Sulpis and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "Carbon dioxide (CO2), produced and released to the atmosphere by human activities, has been accumulating in the oceans for approximately two centuries and will continue to do so well beyond the end of this century if emissions are not curbed. One direct consequence of CO2 build-up in the atmosphere and its transfer to the ocean is the acidification of seawater. Calcite, a mineral secreted by many organisms living in the surface ocean to produce their shells and skeletons, covers a large part of the seafloor and acts as a natural anti-acid, neutralizing CO2. Thus, a precise knowledge of the kinetics of this dissolution reaction is necessary to predict the ocean recovery time towards its pre-acidification state once anthropogenic CO2 emissions are curbed. This thesis combines laboratory experiments, oceanographic measurements and model outputs to explore and unravel the mechanisms that control calcite dissolution at the sediment-water interface (SWI) on the seafloor in the context of current anthropogenic ocean acidification. Using a newly developed temperature-controlled rotating-disk reactor, as well as a stirred reactor, we were able to measure the rate of dissolution of simulated and natural sediment disks of variable calcite content under environmental and hydrodynamic conditions representative of deep-sea benthic environments. These experiments revealed that, in contrast to the reigning paradigm that calcite dissolution kinetics in seawater is surface reaction-controlled and of high order, calcite dissolution at the SWI and under deep-sea conditions is linearly dependent on the undersaturation state of the overlying seawater with respect to calcite and controlled by the presence of a diffusive-boundary layer (DBL) above the sediment bed. Therefore, irrespective of the mineralogy and sediment properties, the dissolution rate is simply a function of the saturation state of the overlying seawater with respect to calcite, the calcite content of the sediment, and hydrodynamics at the seafloor. From these observations, using a compilation of seawater chemical variables in the global ocean, corresponding sediment calcite content and rain rates, as well as recently modeled bottom current velocities, we have been able to identify the loci of current anthropogenic calcite dissolution and its rate. We found that significant anthropogenic dissolution of calcite at the seafloor currently occurs in the western North Atlantic, where the bottom waters are youngest, and at various hot spots in the southern Atlantic, Indian and Pacific Oceans. Using model projections for the 21st century, under a “business as usual” scenario, we found that while seawater will become more corrosive to this mineral, calcite dissolution at the seafloor will decrease in intensity because bottom currents will slow down and the amount of calcite particles delivered to the seafloor will diminish. These results indicate that the neutralization of human-made CO2 by calcite dissolution at the seafloor may take longer than previously thought. These findings are of critical interest to the scientific community and the public, as these results have far reaching implications for ocean acidification mitigation, to the fate of benthic communities living under increasing environmental stress, and to geologists contemplating both present and past records of ocean acidification"--

Download or read book Public Roads of Tennessee written by and published by . This book was released on 1906 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Groundwater Chemical Kinetics and Fractal Characteristics of Karst Tunnel written by Cangsong Li and published by Springer Nature. This book was released on 2019-11-15 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: The key to the solution of geological hazards such as Karst water inrush and mud burst in tunnel lies in the accurate prediction or detection of Karst and groundwater. By means of on-site monitoring, theoretical analysis and indoor simulation experiments, the authors conduct in-depth research on the characteristics of water-bearing media and their mechanism of action, and explored the relevance of "Karst morphology", "Karst groundwater" and "fractal characteristics". An evaluation model of Karst development degree based on hydrochemical kinetic parameters and fractal index of Karst morphology is established. Based on the combination of Karst groundwater dynamics, hydrochemistry, water-rock interaction theory and fractal theory, the hydrochemical Kinetics and fractal index evaluation technique for Karst development is proposed. It provides a new theory and method for improving the accuracy of Karst and groundwater forecasting. The research results are of practical and guiding significance to the construction, Karst geological disasters prevention and management of various underground projects in Karst areas. Engineers and technicians, hydrogeological engineering geologists, and college students engaged in tunnel and underground engineering will find it valuable.

Download or read book Encyclopedia of Caves and Karst Science written by John Gunn and published by Taylor & Francis. This book was released on 2004 with total page 1971 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Encyclopedia of Caves and Karst Science examines cave and karst geoscience, cave archaeology and human use of caves, art in caves, hydrology and groundwater, cave and karst history, and conservation and management.

Download or read book The Dissolution Kinetics of Calcite Dolomite and Dolomitic Rocks in the CO2 water System written by Janet S. Herman and published by . This book was released on 1982 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Science and Technology of Industrial Water Treatment written by Zahid Amjad and published by CRC Press. This book was released on 2010-04-05 with total page 530 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mineral scale deposits, corrosion, suspended matter, and microbiological growth are factors that must be controlled in industrial water systems. Research on understanding the mechanisms of these problems has attracted considerable attention in the past three decades as has progress concerning water treatment additives to ameliorate these concerns.

Download or read book The Handbook of Groundwater Engineering written by Jacques W. Delleur and published by CRC Press. This book was released on 2006-11-16 with total page 1342 pages. Available in PDF, EPUB and Kindle. Book excerpt: A complete treatment of the theory and practice of groundwater engineering, The Handbook of Groundwater Engineering, Second Edition provides a current and detailed review of how to model the flow of water and the transport of contaminants both in the unsaturated and saturated zones, covers the production of groundwater and the remediation of contaminated groundwater.

Download or read book Hard Rock Hydrosystems written by International Association of Hydrological Sciences and published by . This book was released on 1997 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Processes in Karst Systems written by Wolfgang Dreybrodt and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: Karst Systems deal with the question of how the subsurface drainage system, typical of Karst areas develops from its initial state to maturity. Equal attention is given to physical, chemical and geological conditions which determine karstification. The reader will find discussions of mass transport, chemical kinetics, hydrodynamics of fluxes, and the role of dissolution and precipitation of Calcite as they occur in experiments and natural environments. It offers a wealth of information on a complex natural system to hydrologists, hydrochemists, geologists and geographers.

Download or read book Calibration and Reliability in Groundwater Modelling written by Karel Kovar and published by IAHS Press. This book was released on 1996 with total page 622 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dissolution Kinetics of Calcite Dolomite and Dolomitic Rocks in the Carbon Dioxide water System written by Janet Suzanne Herman and published by . This book was released on 1984 with total page 219 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Calcite Dissolution Kinetics in the System H2O Co2 CaCo3 with Participation of Foreign Ions written by Dieter Buhmann and published by . This book was released on 1986 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Dissolution Kinetics of Calcite Dolomite and Dolomitic Rocks in the Carbon Dioxide water System written by Janet Suzanne Herman and published by . This book was released on 1982 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evolution of Early Karst Aquifers written by Franci Gabrovšek and published by Založba ZRC. This book was released on 2000 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: Knjiga (Zgodnji razvoj kraških vodonosnikov: od enostavnih principov do kompleksnih modelov) na osnovi numeričnih modelov odgovarja na to, kateri parametri in kateri procesi določajo časovni in prostorski razvoj kanalov v kraškem vodonosniku. V prvem delu je opisan model korozijskega razvoja enostavne (enodimenzionalne) razpoke v različnih geokemičnih, hidroloških in geoloških pogojih. Numeričnim rezultatom so dodani analitični približki, ki nudijo bolj splošen pogled na dinamiko razvoja razpoke.

Download or read book Processes of a Speleogenessis sic written by Wolfgang Dreybrodt and published by Založba ZRC. This book was released on 2005-01-01 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evolution of Karst written by Franci Gabrovšek and published by Založba ZRC. This book was released on 2002-09-16 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: Knjiga Evolution of karst: from prekarst to cessation (Razvoj krasa: od predkrasa do izginotja) je zbornik istoimenskega simpozija, ki je v septembru 2002 potekal na Inštitutu za raziskovanje krasa ZRC SAZU. Namen knjige je odgovoriti na vprašanja, kot so: Kdaj se začne kras in kdaj končač Kateri procesi in dogodki določajo razvoj kraškega podzemlja in površjač Kako je razvoj krasa povezan s pretakanjem voda v kraškem vodonosniku in kako z razvojem in razširjenostjo bioloških vrstč Kako merimo čas, ki je minil od določenih dogodkov v krasuč