Showing papers in "Marine Chemistry in 2006"

TL;DR: In this paper, the results of the stochastic constants on the seawater pH scale for the dissociation of carbonic acid in seawater have been made as a function of salinity (1 to 50) and temperature (0 to 50 °C).

TL;DR: In this paper, an improved model was presented for the calculation of the solubility of carbon dioxide in aqueous solutions containing Na +, K +,C a 2+,M g 2+ ),C l �, and SO4 2� with experimental accuracy.

TL;DR: In this article, the solubility of iron, aluminium, manganese and phosphorus in aerosol samples collected between 49°N and 52°S during three cruises conducted in the Atlantic Ocean as part of the European Union funded IRONAGES programme was determined.

TL;DR: In this article, surface sediment samples collected in the Taranto Gulf (Ionian Sea, Southern Italy) in order to evaluate their levels and spatial distribution in this important area of the Mediterranean Sea.

TL;DR: The accumulation of nine heavy metals in fine-grained sediments from the mangrove fringed coast of French Guiana is evaluated in this paper, showing that the variations in heavy metal content with depth or between mangroves areas result largely from diagenetic processes rather than changes in metal input resulting from local human activities.

TL;DR: In this article, complete rare earth element (except Eu) and Y concentrations from the estuarine mixing zone (salinity = 0.2 to 33) of Elimbah Creek, Queensland, Australia, were measured by quadrupole ICP-MS without preconcentration.

TL;DR: The isotopic composition (d 13 C and d 15 N) and organic carbon (OC) and total nitrogen (TN, organic plus inorganic) content of 37 carbonate-free surficial sediments of the subtropical Pearl River estuary and the adjacent shelf of South China Sea (SCS) was determined in this paper.

TL;DR: In this paper, Thorium-234 is used as a tracer of ocean particle flux, primarily as a means to estimate particulate organic carbon export from the surface ocean, and the results obtained using a single sampling method show the most predictable behavior.

TL;DR: In this paper, a study of groundwater and coastal waters of southern Brazil adjacent to a 240 km barrier spit separating the Patos Lagoon, the largest coastal lagoon in South America, from the South Atlantic Ocean is presented.

TL;DR: In this article, the authors examined dissolved oxygen (DO), the carbonate system and nutrients in the upper reach of the Pearl River estuary in a very dry season in February of 2004.

TL;DR: In this article, the molecular structure of marinedissolved organic matter (DOM) for thermogenic signatures in different water masses of the Southern Ocean was explored using ultrahigh-resolution mass spectrometry via the Fourier transform-ion cyclotron resonance technique (FT-ICR-MS).

TL;DR: In this article, rates of methylation and demethylation in sediment of the Hudson River, Chesapeake Bay and Bay of Fundy were measured using stable isotopes of mercury (Hg) and methylmercury (MeHg).

TL;DR: Waples et al. as discussed by the authors reviewed current 234Th scavenging models and discussed the relative importance of the non-steady state and physical terms associated with the most commonly used model to estimate 234Th flux.

TL;DR: In this article, the authors investigated total and methylmercury in solids and porewaters relative to total sulfide concentration, redox potential, sediment grain size, and total organic carbon in a range of sediment types from the Bay of Fundy region of Canada.

TL;DR: In this paper, a marine environment off southwestern Taiwan known to contain both biogenic and petrogenic hydrocarbons and two nearby rivers were selected for investigating possible difference in ACL values between their sediments.

TL;DR: In this paper, a review of current knowledge and what future endeavors should be taken to understand the marine chemistry of thorium is presented, along with an analysis of the relationship between thorium isotopes and the parent-daughter disequilibrium in the water column.

TL;DR: In this paper, a model of the carbonate system in seawater is employed to show how pH buffers are operating, and a new approach is presented to determine the rate constants, k+ and k−, for the conversion reaction of CO2 to HCO3− and vice versa, by means of membrane inlet mass spectrometry (MIMS).

TL;DR: In this paper, a review of the chemistry of actinide ions in the environment is reviewed to show the spectrum of reactions that can occur in natural waters which must be considered in assessing the environmental behavior of the actinides.

TL;DR: In this article, the authors examined the efficacy of various washing techniques, the mechanisms effecting FeOx dissolution, and the methods for controlling contamination from the wash solutions, and showed that a wash solution containing two types of chelating agents, oxalate and EDTA, is effective for dissolving fresh precipitates via a ligand-promoted process.

TL;DR: In this paper, the authors applied a conservative mixing model of colored dissolved organic matter (CDOM) optical properties to a dataset collected in the Baltic Sea during 11 years of continuous observations in 1993-2004.

TL;DR: The thorium isotope 234Th (half-life 24.1 days) has been used as a tracer for a variety of transport processes in aquatic systems as mentioned in this paper, which has led to a rapidly increasing number of studies that require analyses of 234Th in both marine and freshwater systems.

TL;DR: In this paper, the authors compared the ranges of physico-chemical conditions that characterize mussel-dominated and tubeworm-dominated communities at different sites within the vent field of the 9°50′N segment on the East Pacific Rise.

TL;DR: In this paper, the authors measured the partitioning of Fe between soluble and colloidal size classes and characterized the concentrations and conditional stability constants of Fe ligands within these size classes.

TL;DR: In this paper, the authors investigated the sorption of yttrium and the rare earth elements (YREEs) by amorphous ferric hydroxide at low ionic strength (0.09 M) over a wide range of pH.

TL;DR: In this paper, carbon-normalized yields of lignin phenols and δ13C measurements of suspended particulate and dissolved organic matter (POM and DOM) were determined in samples from several locations and depths in the western North Atlantic Ocean.

TL;DR: The flux of various constituents changed over time and the magnitude and direction of the fluxes of the major metals (Fe and Mn) correlated with the extent of oxygen depletion and the presence or absence of sulfide in the water column.

TL;DR: In this paper, concentrations of DMS and its precursor compound dimethylsulphide (DMSP) in a variety of sea ice and seawater habitats in the Antarctic Sea Ice Zone (ASIZ) during spring and summer were presented.

TL;DR: This paper examines the variety of 234 Th applications that have been used to understand natural aquatic processes in four major areas: vertical transport, particle cycling, horizontal transport, and sediment dynamics.

TL;DR: In this article, the presence, distribution, nature and sources of 22 Aromatic Hydrocarbons (PAHs), which are important environmentally and toxicologically, in sediments from the Stagnone coastal lagoon at Marsala (Italy).

TL;DR: In this article, the second order pH dependence for the oxidation of Fe(II) with O2,H 2O2 and their mixtures has been studied and a kinetic model has been applied to describe the experimental results.