Showing papers in "Applied Geochemistry in 2009"

TL;DR: In this paper, 1600t of CO2 was injected at 1500m depth into a 24m-thick sandstone unit of the Frio Formation, a regional aquifer in the US Gulf Coast.

TL;DR: A review of the existing knowledge of arsenopyrite oxidation is presented in this paper, based on a survey of existing literature, which has focused on processes and reactions at the mineral surface.

TL;DR: In this article, the extraction of soil inorganic P with CaCl 2 (P-CaCl 2 ) and geochemical modelling were combined in order to unravel the processes controlling the environmentally available P (EAP) of a soil over a range of pH values.

TL;DR: In this paper, the authors examined the main factors and mechanisms controlling the groundwater chemistry and salinity of the unconfined aquifer of Bou-Areg, on the Mediterranean coast of NE Morocco, in conjunction with the results of an electrical imaging tomographic survey.

TL;DR: In this paper, a broad spectrum of geological materials was analyzed using a commercial bench-top LIBS system with broadband detection from ∼200 to 965nm, with multiple single-shot spectra acquired.

TL;DR: In this article, the authors studied the genesis of soda waters and provided new insights into mechanism of As and F− enrichment in the aquifer system, which is the result of incongruent dissolution of aluminosilicates at one stage of their interaction with groundwater when the water is oversaturated with respect to calcite and evapotranspiration-related salt accumulation is not too strong.

TL;DR: In this paper, three types of smelting slags originating from historically different smelters in the Tsumeb area (Namibia) were studied: (i) slags from processing of carbonate/oxide ore in a Cu-Pb smelter (1907-1948), (ii) sags from Cu and Pb smeltings of sulphide ores (1963-1970), and (iii) granulated Cu slags (1980-2000) were combined with detailed mineralogical investigation using X-ray diffraction analysis (X

TL;DR: The Odiel river basin is heavily affected by acid mine drainage from the sulphide mining areas in the Iberian Pyrite Belt (IPB), and a thorough study has been conducted along this fluvial system, monitoring the seasonal influence on the pollution level and its hydrochemical characteristics as discussed by the authors.

TL;DR: In this paper, the results of experimental and numerical modeling studies performed in sandstones of the saline aquifer of the Rio Bonito Formation, Parana Basin, are presented, and it is suggested that CO 2 can be permanently stored as carbonates as CO 2 reacts with rocks of this formation and forms CaCO 3 at temperatures and pressures similar to those encountered for CO 2 storage in geological formations.

TL;DR: The major element results of both bulk and clay-fraction sediments indicate that the formation of clay minerals is accompanied by leaching of Ca and Na first and of Fe and Mn thereafter during the chemical weathering process as discussed by the authors.

TL;DR: In this paper, the authors compared the groundwater of Huhhot basin (HB) and western Bengal basin (WBB), China and India, to understand the processes controlling overall groundwater chemistry in the HB.

TL;DR: In this article, four determinations of pH were obtained: (1) field pH at field temperature, (2) laboratory pH at laboratory temperature,(3) pH based on acidity titration, (4) pHbased on charge imbalance (at both laboratory and field temperatures), and acidity pH were in close agreement for pH ± 10%.

TL;DR: In this article, the authors investigated the potential for soils to be modified with Ca-rich materials (e.g., demolition waste or basic slag) to capture some of the transferred C as geologically stable CaCO3.

TL;DR: In this paper, a summary of recent work by the authors in constraining the sources of waters and weathering processes in surface catchments and aquifers, and indicates cases where Sr isotopes alone are insufficient to solve hydrological problems.

TL;DR: The distribution of As in a variety of sample materials was studied at different scales, from continental to local, combining published data sets with the aim of delineating the impact and relative importance of geogenic vs. anthropogenic As sources as mentioned in this paper.

TL;DR: In this paper, the potential of diffuse reflectance (DR) Fourier Transform (FT) in mid-IR and near-infrared (NIRS) spectroscopy to reduce the need for conventional analysis for the determination of major and trace elements in such continental-scale surveys was examined.

TL;DR: In this article, a model for the sequence of events that typically occurs in an oxidizing tailings impoundment is developed outlining the progressive oxidation of a unit of mine waste containing a mixed assemblage of pyrrhotite and pyrite.

TL;DR: In this article, the authors measured pyrite oxidation rates in a NaHCO 3 solution and showed that the coating grows in two stages, in the first stage Fe oxyhydroxide colloids form and then attach to the surface to produce a slight reduction in oxidant transport and in the second stage interstitial precipitation of Fe oxyoxide material between the colloidal particles reduces the oxidant's diffusion coefficient by more than five orders of magnitude.

TL;DR: In this article, the composition of groundwater samples from 926 locations spanning over the floodplains of three severely arsenic affected regions in Asia (Bengal, Mekong, Red River, and Red River deltas) were assessed.

TL;DR: In the Southern High Plains (SHP) aquifer, Texas, relative to those in other semi-arid, oxidizing systems, As concentrations in the SHP aquifer are generally associated with adsorption onto hydrous metal (Al, Fe or Mn) oxides and mobilization with increased pH as mentioned in this paper.

TL;DR: In the post-war years, hydrogeochemistry was influenced heavily by the advances in other disciplines including physical chemistry, metallurgy and oceanography, and important advances in analytical chemistry allowed multi-element and trace element applications to be made as discussed by the authors.

TL;DR: In this paper, chemical data of such acid waters from Copahue volcano, Argentina, covering 8 years of observations, show evidence for changes in composition related to water rock interaction at depth prior to emergence of the fluids at the surface.

TL;DR: In this paper, a unique evaluation of the differential release, transport, and fate of Fe and 15 trace elements during progressive weathering of the Devonian New Albany Shale in Kentucky is presented.

TL;DR: In this paper, the field geochemistry over three seasons (pH, salinity, and temperature), as well as major ions, trace elements, and H, O, and S stable isotopes of surface waters and shallow groundwaters from 59 ephemeral lakes in southern Western Australia (WA) are reported.

TL;DR: In this article, the effects of groundwater on element concentrations are more evident in soils than stream sediments, and a "winnowing index" was created using ratios of Th to Al that revealed differing erosional and depositional environments.

TL;DR: In this article, the variability of polycyclic aromatic hydrocarbon (PAH) and perylene concentrations in Chini Lake, Malaysia was investigated, and the results of hierarchical cluster analysis suggested different input sources for the top and bottom layers.

TL;DR: A detailed study of the chemical composition of the groundwater surrounding the Mt. Hekla volcano in south Iceland was performed to assess fluid evolution and toxic metal mobility during CO2-rich fluid basalt interaction as mentioned in this paper.

TL;DR: A soil geochemical survey was conducted in a 27,000km 2 study area of northern California that includes the Sierra Nevada Mountains, the Sacramento Valley, and the northern Coast Range as discussed by the authors.

TL;DR: In this paper, the authors show that evapotranspiration is an important process controlling the enrichment of Na and Cl as well as trace elements such as As, B, F and Br in groundwater.

TL;DR: In this paper, the concentrations of trace metals and the rare earth elements (REE) in the host rocks, stream sediment, surface waters and acid mine drainage associated with abandoned mine adits and tailings impoundments were determined, in order to fingerprint their sources and to understand their mobility and water-rock interaction.