Trace Element Geochemistry of Groundwater Flow Systems in Southern Nevada and Eastern California PDF Download

Author: Xiaoping Zhou
Publisher:
ISBN:
Category : Groundwater flow
Languages : en
Pages : 306

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Author: Xiaoping Zhou
Publisher:
ISBN:
Category :
Languages : en
Pages : 306

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Author: Stephanie Scholten Willis
Publisher:
ISBN:
Category : Geochemistry
Languages : en
Pages :

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Book Description
This research focuses on trace element geochemistry in three groundwater flow systems: the Carrizo Sand, the Upper Floridan, and the Aquia aquifers. The focus is threefold: (i) studying the geochemical behavior, concentrations, and fractionation patterns of rare earth elements (REEs) along two flow paths by examination of both groundwater and sediment samples, (ii) investigating the behavior of arsenic (As) and antimony (Sb) and comparing these data to reveal the biogeochemical processes affecting As and Sb concentrations and speciation as well as determining correlations between As and Sb concentrations, and (iii) formulating adsorption isotherms to demonstrate the adsorption capacity of As onto sediments from the Carrizo Sand and Aquia aquifers. The investigation of the Aquia aquifer groundwaters and sediments indicated the chief source of REEs in the groundwater was due to the dissolution of carbonate minerals (i.e. shell fragments). A statistical relationship was found between As and Sb in the groundwaters of three well defined aquifers (the Carrizo Sand, the Upper Floridan, and the Aquia aquifers), with the best correlation occurring within the Aquia groundwaters. The adsorption isotherms indicate that As(V) strongly adsorbs to the Carrizo Sand aquifer sediments whereas As(III) more preferentially adsorbs to the Aquia aquifer sediments.

Author: Karen H. Johannesson
Publisher: Springer Science & Business Media
ISBN: 140203234X
Category : Science
Languages : en
Pages : 306

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This is the first book of its kind to focus on the geochemistry of the lanthanide series elements in groundwater/aquifer environments. The contributors are leading researchers in the study of low-temperature geochemistry of rare earth elements. Individual chapters address analytical techniques, water-rock interactions, aqueous complexation, and the reactions and processes that influence these heavy metals along groundwater flow paths.

Author: Irene M. Farnham
Publisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 320

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Author: Broder J. Merkel
Publisher: Springer Science & Business Media
ISBN: 3540746684
Category : Science
Languages : en
Pages : 230

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Book Description
To understand hydrochemistry and to analyze natural as well as man-made impacts on aquatic systems, hydrogeochemical models have been used since the 1960’s and more frequently in recent times. Numerical groundwater flow, transport, and geochemical models are important tools besides classical deterministic and analytical approaches. Solving complex linear or non-linear systems of equations, commonly with hundreds of unknown parameters, is a routine task for a PC. Modeling hydrogeochemical processes requires a detailed and accurate water analysis, as well as thermodynamic and kinetic data as input. Thermodynamic data, such as complex formation constants and solubility-products, are often provided as databases within the respective programs. However, the description of surface-controlled reactions (sorption, cation exchange, surface complexation) and kinetically controlled reactions requires additional input data. Unlike groundwater flow and transport models, thermodynamic models, in principal, do not need any calibration. However, considering surface-controlled or kinetically controlled reaction models might be subject to calibration. Typical problems for the application of geochemical models are: • speciation • determination of saturation indices • adjustment of equilibria/disequilibria for minerals or gases • mixing of different waters • modeling the effects of temperature • stoichiometric reactions (e.g. titration) • reactions with solids, fluids, and gaseous phases (in open and closed systems) • sorption (cation exchange, surface complexation) • inverse modeling • kinetically controlled reactions • reactive transport Hydrogeochemical models depend on the quality of the chemical analysis, the boundary conditions presumed by the program, theoretical concepts (e.g.

Author: Richard B. Wanty
Publisher:
ISBN:
Category : Geochemical prospecting
Languages : en
Pages : 200

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Author: Wei Rong
Publisher:
ISBN:
Category : Hydrogeology
Languages : en
Pages : 190

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Book Description

Author: Jacob Freedman
Publisher: Geological Society of America
ISBN: 0813721555
Category : Medical
Languages : en
Pages : 128

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Book Description

Author: Ekaterina Kiseleva
Publisher:
ISBN: 9780549213697
Category : Groundwater
Languages : en
Pages : 278

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Book Description
This thesis presents a detailed hydrogeochemical study of groundwater from the Baldwin Park Operable Unit in the San Gabriel Valley. Trace element geochemical data were acquired for waters collected from several multi-port wells along a NE-SW transect parallel to the dominant direction of groundwater flow. Correlation analysis reveals several strong trends between trace elements, including positive correlations between Ba, Sr, and Mg, Fe and Ti, Ba and Eu, Sr and U, and others. This trace element study also shows that groundwater quality is non-uniform across the study area. The distribution of trace element concentrations from three depth zones (shallow, intermediate, and deep) within the aquifer differ, possibly indicate variable degrees of water-rock interaction and/or changes in pH or oxidation state.