Showing papers in "Applied Geochemistry in 2013"

TL;DR: In this article, the authors assessed the composition of flowback waters from the Marcellus shale in Pennsylvania, USA and found that the greatest concentration of Cl− in flowback water is 151,000mg/L.

TL;DR: In this article, the authors present data on widespread abnormal accumulations in coal deposits of some rare metal(loid)s (Ge, Ga, Se, Li and REE+Y), which play a key role in energy-efficient technologies and alternative power development.

TL;DR: The results of the geo-accumulation index (Igeo) and the potential ecological risk index (Er i ) of the metals revealed the following orders: Cd > Cu > Cr > Pb > Ni > Mn and Pb showed medium spatial autocorrelations within the sampling region as discussed by the authors.

TL;DR: In this article, a frequency-space-based method (spectrum-area fractal model, S-A) and a robust principal component analysis (RPCA) were applied to explore the effects of the data closure problem and to study the integrated geochemical anomalies associated with polymetallic Cu mineralization using a stream sediment geochemical dataset collected from the Zhongteng district, Fujian Province (China).

TL;DR: In this paper, the authors investigated the possible degradation of water quality in shallow aquifers overlying producing shale formations, where approximately 4000 wells have been drilled since 2004 to extract unconventional natural gas.

TL;DR: In this article, three fractal models, consisting of the concentration-area (C-A), spectrum-area and singularity index (S-A) models, were applied to identify geochemical anomalies in the covered area located in the Chaobuleng Fe polymetallic district, Inner Mongolia (China).

TL;DR: In this paper, the adsorption of dissolved Se(VI) onto three synthetic Fe oxy-hydroxides (i.e., 2-line ferrihydrite, goethite and lepidocrocite) was measured as a function of sorbent concentration.

TL;DR: In this paper, the authors used stable isotopes (δ15NNO3, δ18ONO3 and δ11B) to identify the sources, sinks, major transformations and sites of accumulation within groundwater of the Lombardy plain.

TL;DR: In this article, principal components analysis (PCA) was used to identify various underlying natural and anthropogenic processes that created these distinct water types, which can be invoked to explain 82% of the total variance in water quality parameters.

TL;DR: In this article, a large number of major, minor and trace element analyses of meteoric, mineral, thermal and mine waters from a geologically well-known and variable area of about 200 × 150 km in SW Germany were performed.

TL;DR: In this paper, agricultural and grazing land soil samples were collected from a large part of Europe (33 countries, 5.6 million km2) at an average density of 1 sample site/2500 km2.

TL;DR: In this paper, a typical coastal karst aquifer, developed in lower Cretaceous limestones, on the western Mediterranean seashore (La Clape massif, southern France) was investigated.

TL;DR: In this paper, the authors investigated the distribution and sources of Cd in soils from a Cd-rich area in the Three Gorges region, China and found that geogenic sources dominated in soils with low and moderate Cd concentrations.

TL;DR: The competitive adsorption of arsenate and arsenite with silicic acid at the ferrihydrite-water interface was investigated over a wide pH range using batch sorption experiments, attenuated total reflectance Fourier transform infrared (ATR-FTIR), extended X-ray absorption fine structure (EXAFS) spectroscopy, and density functional theory (DFT) modeling.

TL;DR: In this paper, a critical assessment of P sorption to a range of mineral-based materials and the potential application of these materials to P recovery schemes is provided, as well as a review of the potential applications of such materials for P recovery from solution.

TL;DR: In this paper, the early diagenesis of the major carrier phases (Fe and Mn minerals), trace elements (As, Co, Cr, Hg, MeHg, Ni) and nutrients (RNO 3, NH þ 4, RPO 4) and their exchange at the sediment water/interface were studied in the Berre Lagoon, a Mediterranean lagoon in France, at one site under two contrasting oxygen-ation conditions (strictly anoxic and slightly oxic) and at an adjacent site with perennially welloxygen-ated water.

TL;DR: In this paper, the authors evaluated the mechanical and pH-dependent leaching performance of a mixed contaminated soil treated with a mixture of Portland cement (CEMI) and pulverised fuel ash (PFA).

TL;DR: In this article, the authors investigated groundwater recharge and evolution in the Quaternary aquifer beneath the Dunhuang Basin using chemical indicators, stable isotopes, and radiocarbon data to provide guidance for regional water management.

TL;DR: In this paper, the solid phases associated to acid mine drainage at the Tharsis mines (SW Spain) were investigated. And the authors provided an inventory of the AMD-precipitates, describing their main modes of occurrence and mineral assemblages.

TL;DR: In this paper, the authors examined the effect of aquifer salinity gradients on the distribution of naturallyoccurring trace elements of health significance such as radium (Ra), with possible implications for the usability of water resources in addition to the increase of dissolved solids (TDS) concentrations.

TL;DR: The analysis of stable isotopes and SO 4 2 - / Cl - and δ18O/Cl− ratios showed that the major chemical and physical processes determining the salinity in the area are evaporation, mixing with saline water, cation exchange, oxidation of organic matter, migration and seepage of (hyper) saline water.

TL;DR: In this paper, three large-scale test piles measuring 60 by 50 meters at the base and 15 meters in height were constructed at the Diavik diamond mine in the Northwest Territories, Canada, to evaluate the quality of water emanating from waste rock stockpiles.

TL;DR: In this article, the dynamics of dissolved organic matter (DOM) in tropical and subtropical rivers during storm events were examined in a sub-tropical river (the North Jiulong River, China).

TL;DR: In this paper, an experimental approach was carried out in order to better understand the rock-water-CO 2 interactions with two main objectives: the first was to assess the evolution of the formation water chemistry and mineralogy of the solid phase over time during the interaction; the second concerned the design of an isotopic monitoring program for freshwater resources potentially affected by CO 2 leakage.

TL;DR: In this article, As concentrations in an aqua regia extraction determined by inductively coupled plasma emission mass spectrometer (ICP-MS) were 5.7 mg/kg for the Ap samples and 5.8 mg/ kg for the Gr samples.

TL;DR: In this paper, the deployment and recovery of chemical tracers and their use on various CCS projects are described, where the tracers can complement geophysical measurements (e.g. seismic) in understanding the formation behaviour of CO2.

TL;DR: In this paper, the authors used a reactive diffusion model to investigate the fate of injected supercritical CO 2 fluid in the proposed baseline reservoir-plus-brine system, and they showed that the rate of CO 2 sequestration is sensitive to the mineral-water reaction kinetic constants between approximately 10 and 4000a.

TL;DR: In this paper, the influence and mechanism of soil-derived humic acid (SHA) on adsorption of P onto particles in soils were determined at different concentrations of SHA, pH, ionic strength and order of addition of adsorbents.

TL;DR: The Salar del Hombre Muerto (SHM) salt pan in the Andes of northwestern Argentina has a chemical and isotopic composition which is consistent with Li derived from several sources: the modern halite saturated lagoon, Li-rich salts and brines formed recently, and dissolution of halite which precipitated from ancient saline lakes as mentioned in this paper.

TL;DR: In this paper, a 3D multi-phase reactive transport model was used to predict the degree to which shallow groundwater might be affected by leaks from a CO2 sequestration reservoir, particularly over long time scales.