Showing papers in "Marine Chemistry in 2020"

TL;DR: A perspective based on the most recent literature on EPS, marine oil spills and waste water treatment is provided to describe the relationship between the P/C ratio of EPS and a number of biophysical properties related to biopolymer aggregation propensity, e.g., relative hydrophobicity, surface activity and surface tension, attachment efficiency, light-induced chemical crosslinking, and sedimentation efficiency of marine snow in marine environments.

TL;DR: In this paper, the interaction of mercury (Hg) with plastics in coastal marine environments, a total of 353 plastic items were collected from 4 beaches located on the Spanish Mediterranean coast, with different characteristics.

TL;DR: In this paper, the authors used direct experimental techniques optimized for replicating in situ anoxic conditions, and showed that NO2− oxidation is substantial, widespread, and consistent across the eastern tropical Pacific Ocean.

TL;DR: In this paper, the authors present a detailed characterization of oil that arrived together with marine snow at a 1400m deep sediment trap six weeks to 13 months after the spill had ended, revealing that sinking diatom aggregates and other marine snow scavenged measurable amounts of weathered Macondo oil droplets remaining in the water, and carried them to the deep-seafloor for approximately 1-year after a spill.

TL;DR: In this paper, the authors examined iron redox cycling in the sediments of the Santa Monica Basin (SMB), CA as it relates to benthic sources of iron to the water column.

TL;DR: In this article, the authors studied trace metal biogeochemical cycling at the Mertz Glacier Polynya and the Balleny Islands, as well as two meridional cross-frontal transects.

TL;DR: In this paper, a series of lab-based experiments were conducted to assess the magnitude of pH-dependent errors for spectrophotometric pH measurements in seawater by directly comparing its performance to pH measured by an ion sensitive field effect transistor (ISFET) pH sensor known to have Nernstian behavior.

TL;DR: In this article, the authors examined whether a composite property, such as the difference between total alkalinity (TA) and dissolved inorganic carbon (DIC), which is conservative to ocean mixing and is not sensitive to temperature and pressure changes, can be used for measuring OA rates and deciphering the underlying OA mechanisms in the global ocean as it in surface waters of several regional oceans.

TL;DR: In this paper, the meridional distributions of fluorescent dissolved organic matter (FDOM) and various hydrologic properties were investigated along 67°E in the western Indian Ocean, and the results indicated that the distribution of FDOMH is attributed to the mixing of various deep-water masses during the global ocean circulation.

TL;DR: In this article, the authors investigated the distribution patterns of microplastics in a prototype coastal upwelling environment (Ria de Vigo estuary, Spain) using a combined approach of field data and modeling.

TL;DR: In this paper, the changes of the chemical composition of extracellular polymeric substances (EPS) under stress from a water-accommodated fraction (WAF) of oil or a chemicallyenhanced WAF (CEWAF), were investigated.

TL;DR: In this article, the authors used multivariate parallel factor analysis and pyrolysis-gas chromatography-mass spectroscopy analysis (Py-GC-MS) to characterize dissolved organic matter (DOM) from Guadalquivir, Guadiana, and Tinto-Odiel estuaries.

TL;DR: Trace element fluxes and their residence times were determined along the GEOTRACES East Pacific Zonal Transect (GP16/EPZT) and found to reflect the diverse physical and geochemical conditions encountered across the track.

TL;DR: In this article, chromium concentration and Cr isotope data for samples from highly reducing environments ([O2] ) were presented, showing that there is a strong C isotope fractionation during reduction of oxidized Cr(VI) to reduced Cr(III).

TL;DR: In this article, the isotope ratios of Ni (δ60Ni) and Cu(δ65Cu) in sinking particles, aerosols, and seawater collected from the northern South China Sea to identify sources and transformation processes of the two metals.

TL;DR: The Isonzo/Soca River is the main source of freshwater into the Gulf of Trieste (northern Adriatic Sea) and is known as the primary source of Hg due to long-term cinnabar (HgS) extraction from the Idrija mining district (Slovenia) as mentioned in this paper.

TL;DR: In the absence of Hg measurements in the Fram Strait and Barents Sea Opening, these estimates were based on North Atlantic and central Arctic Ocean data alone as discussed by the authors, and they were used to refine the Arctic total Hg and methylated Hg (MeHg) mass budgets.

TL;DR: In this paper, high-resolution spatial surveys of N2O concentrations in three low-DIN (NO3−DIN) conditions were presented, and high resolution spatial surveys were performed in three different estuary waters.

TL;DR: In this article, the role of particle composition in the scavenging, sorption and fractionation of 210Po 210 Pb needs to be better understood to successfully utilize these radionuclides as oceanographic tracers.

TL;DR: In this article, the authors used the Paraiba do Sul River as a laboratory to investigate how thermodynamics compare with biological processes, gas exchange, and tidal advection from mangrove.

TL;DR: In this article, short-term variations of Pt concentrations and primary production indicators were compared in three contrasting coastal sites during spring bloom: (i) the Gironde Estuary mouth (SW France), (ii) the semi-enclosed Arcachon Bay ( SW France), and (iii) the urbanized Genoa Harbor (NW Italy).

TL;DR: In this paper, the salinity and dissolved Sr concentrations and 87Sr/86Sr of the Chilika lagoon (India), the largest brackish-water lagoon in Asia, have been investigated for three different seasons (pre-monsoon (May 2017), monsoon (Aug, 2017) and post-moonning (Jan, 2018) to infer coastal behavior of Sr and estimate the SGD fluxes to the coastal ocean.

TL;DR: In this article, the partial pressure of CO2 and concentration of dissolved CH4 and N2O were studied during July 2017 in three estuaries of the southern Iberian Atlantic basin: the Guadalquivir, Tinto - Odiel and Guadiana.

TL;DR: In this paper, the authors measured particulate oxidized manganese (MnOx), where x ≤ 1.8-2, reactive soluble manganes(III) (soluble Manganese(III), which forms a complex with desferrioxamine-B (mn(III)-LDFOB)), and total dissolved manganous (dMnT; manganius(II)+mnox) in Northwest Atlantic offshore waters (10-2600m).

TL;DR: In this article, a real-time monitoring station observatory (acquiring data every 15min) deployed for a period of two and a half years was used to provide, for the first time, insights regarding DO dynamics on a representative site of the productive Ria Formosa coastal lagoon, south Europe.

TL;DR: In this article, sediment samples from the less studied easternmost section of the ultra-slow spreading Southwest Indian Ridge (SWIR) are investigated to decipher the signatures of hydrothermal activity; the sediments are mainly composed of calcium carbonate (55−85%), Fe-Mn-(oxyhydr)oxide (13−27%), and residual aluminosilicate phases (2−17%).

TL;DR: In this article, the authors quantify labile and refractory organic matter in coastal marine sediments with different characteristics collected from the Seto Inland Sea, and to discover the factors controlling the degradability of organic matter.

TL;DR: In this paper, the distribution and chemical properties of natural Fe-binding ligands in Fram Strait and over the northeast Greenland shelf were investigated, shedding light on their potential sources and transport.

TL;DR: In this article, it was shown that the majority of the dissolved organic carbon (DOM) in the karstic Krka River consists of terrestrial molecules, as suggested by the high chromophoric content and low spectral slope (S275-295) values, as well as the predominance of humic-like substances.