Showing papers in "Applied Geochemistry in 2001"

TL;DR: The literature has been critically reviewed in order to assess the attenuation processes governing contaminants in leachate affected aquifers as discussed by the authors, focusing on dissolved organic matter, xenobiotic organic compounds, inorganic macrocomponents as anions and cations, and heavy metals.

TL;DR: In this paper, an extensive soil survey was conducted in urban parks of Hong Kong to study the current conditions of heavy metals contamination in soils, and the results indicated that urban soils in Hong Kong have elevated concentrations of Cd, Cu, Pb and Zn.

TL;DR: In this article, the authors developed new sensitve analytical techniques for the detection of organotin compounds in various environmental samples, such as water and sediments, but also various aquatic organisms and tissues of mammals and birds are contaminated by these compounds.

TL;DR: In this paper, smoke particulate matter from conifers subjected to controlled burning, both under smoldering and flaming conditions, was sampled by high volume air filtration on precleaned quartz fiber filters, and the filtered particles were extracted with dichloromethane and the crude extracts were methylated for separation by thin layer chromatography into hydrocarbon, carbonyl, carboxylic acid ester and polar fractions.

TL;DR: In this article, a 5-step sequential extraction procedure with multielement determination on extraction solutions at each step by ICP-AES was used to analyze soils from historical Pb mining and smelting areas in Derbyshire, England.

TL;DR: In this paper, smoke particulate matter from deciduous trees (angiosperms) subjected to controlled burning, both under smoldering and flaming conditions, was sampled by high volume air filtration on precleaned quartz fiber filters.

TL;DR: The Isonzo river mouth has been the source of Hg in the Gulf of Trieste (northern Adriatic sea) since the sixteenth century, making this shallow basin one of the most contaminated marine areas in the length of time and amount of metal accumulated as discussed by the authors.

TL;DR: In this paper, heavy metal contamination of soils and waters by metalliferous mining activities in an area of Korea was studied using AAS for Cd, Cu, Pb, Zn and Zn.

TL;DR: In this article, a heavily-weathered Tertiary soil from Xinzhou, China was used as a sorbent for defluoridation of high-fluoride drinking water.

TL;DR: The heavy metal contamination and seasonal variation of the metals in soils, plants and waters in the vicinity of an abandoned metalliferous mine in Korea were studied in this paper, where significant levels of the elements in waters and sediments were found up to 3.3 km downstream from the mining site, especially for Cd and Zn.

TL;DR: In this paper, the effect of nonionic surfactants on the solubility and biodegradation of polycyclic aromatic hydrocarbons (PAHs) in the aqueous phase and in the soil slurry phase, as well as the fate of these surfactant, were investigated.

TL;DR: In this paper, the biogeochemical cycling and chemical transformation of Se in Chinese environments is reviewed, especially with regard to the formation of low-Se environments, where the occurrence, distribution, concentration and flux of Se are reported in comparison to those in the rest of the world.

TL;DR: In this article, polycyclic aromatic hydrocarbons (PAHs) were measured in surface sediments and dated core sediments from the Pearl river and estuary, China, to investigate the spatial and temporal variability of anthropogenic pollutants.

TL;DR: In this article, the authors measured the thermal maturity of oils extracted from inclusions and the fluorescence colours of oil-bearing fluid inclusions in 36 sandstone samples from Australasian oil fields.

TL;DR: In this paper, the Pb isotopic and elemental composition of eolian dusts, aerosols and soils collected from urban areas in the Pearl River Delta, China, indicates that the atmospheric Pb pollution originates from automobile exhausts and industry.

TL;DR: For example, this paper found that lichen and moss have remarkably similar multi-element patterns suggesting that they are non-specific accumulators of metals under existing conditions, and that the correlation of other poorly soluble elements and key elemental ratios in lichens and moss are also similar to UCC and modern river sediment values.

TL;DR: The As content of coal changes greatly in different coal beds and different locations of the same bed as mentioned in this paper, and the highest As content is up to 3.5 wt.% in the coal.

TL;DR: In this paper, the distribution of polycyclic aromatic hydrocarbon (PAH) and of phenanthrene-degrading bacteria were determined in the bulk soil and in 4 size aggregate fractions corresponding to sand, coarse silt, fine silt and clay.

TL;DR: In this paper, the authors measured mercury and methylmercury (CH3Hg + ) concentrations in streambed sediment and water at 27 locations throughout the Sacramento River Basin, CA, and found that the highest levels of Hg in unfiltered water (2248 ng/l) were measured at a site downstream of a historic Hg mining area.

TL;DR: In this article, the International Union of Geological Surveys (IUGS) and the International Association of Geochemistry and Cosmochemistry (IAGC) have made preparations for the establishment of a global database for monitoring the state of the environment and identifying problem areas.

TL;DR: In this article, the processes controlling the distribution and behavior of the longer-lived Ra isotopes in continuous Paleozoic carbonate aquifers of parts of Missouri, Kansas, and Oklahoma were elucidated.

TL;DR: The usefulness of stable isotopes of dissolved SO4 (δ34S and δ18O) to study recharge processes and to identify areas of significant inter-aquifer mixing was evaluated in a large, semi-arid groundwater basin in south-eastern Australia (the Murray Basin) as discussed by the authors.

TL;DR: In this paper, the authors used the program EQ3/6 to simulate irreversible mass-transfer between slag deposits and reservoir waters and found that the dissolved concentrations of these elements are controlled by solubility equilibrium with secondary phases.

TL;DR: In this paper, the authors show that there have been modifications of N and C sources due to land use changes, water diversions and irrigation since European settlement of the surrounding basin in the middle 1800s, and that the increase in δ15N concentration over the past 30-50 a is attributed to the increasing agricultural expansion and development in the lower catchment, particularly intensive grazing of cattle for dairying.

TL;DR: In this paper, a detailed characterization of the Cabra-Alcaide karstic massif in both space and time is undertaken and the factors that determine its karstification are discussed.

TL;DR: In this paper, the authors used the diffuse layer model and surface complexation theory to predict metal adsorption in SO4-rich waters, such as acid mine drainage, which can lead to inaccurate predictions of metal speciation.

TL;DR: In this paper, the isobaric solubility of rutile (TiO2) was measured over a broad pH range from pH 1 to 13 between 100 and 300°C.

TL;DR: In this paper, the Gibbs free energies of Fe(II)-Fe(III)-stacked double hydroxysalt green rusts (GRs) were determined from hydromorphic soil solution equilibria with GR mineral in Brittany (France).

TL;DR: In this paper, the authors used water chemistry data along flow paths that characterize the different sectors of the aquifer system, namely: Quaternary aquifer, unconfined sector and shallow and deep confined sectors of Mio-Pliocene aquifer.

TL;DR: In this paper, the authors measured smectite dissolution rates in granitic solutions in a semi-batch reactor at 20, 40, and 60°C, and the dissolution reaction at pH ∼8 was 30.5±1.3 kJ mol−1.