Journal ArticleDOI
Colloidal organic carbon in Huanghe, Changjiang and Qiantang River
TLDR
In this paper, a cross-flow ultrafiltration technique was used to separate colloidal organic carbon (COC) from natural water, and COC in three water samples that were collected from Huanghe, Changjiang and Qiantang River was determined.Abstract:
Cross-flow ultrafiltration techniques havc been used to separate colloidal organic carbon (COC) from natural water, and COC in three water samples that were collected from Huanghe, Changjiang and Qiantang River was determined. On average, COC comprised about 68.6% of the total dissolved organic carbon. The abundance of COC suggested that COC could play important roles in input fluxes and biogeochemistry of organic carbon.read more
Citations
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Marine submicron particles
Mark L. Wells,Edward D. Goldberg +1 more
TL;DR: In this article, the qualitative and quantitative analyses of submicron particles from coastal surface seawaters off California involved their separation by ultracentrifugation, visual examination by transmission electron microscopy (TEM), and the determination of elemental composition by energy dispersive spectroscopy.
Journal ArticleDOI
Distributions of dissolved rare earth elements during estuarine mixing at the Changjiang River mouth
Zhong-Liang Wang,Cong-Qiang Liu +1 more
TL;DR: The first data on the concentrations of dissolved REE in surface waters collected from the north passage of the Changjiang Estuary where the salinity ranges from 0.15 to 19 mglg were determined by ICP-MS after preconcentration with solvent extraction and backextraction techniques.
Journal ArticleDOI
Comparison of HTC method and UV/persulphate method to determine colloidal organic carbon in seawater
TL;DR: In this paper, the application of cross-flow ultrafiltration (CFF) techniques to separate colloidal organic carbon (COC) from truly dissolved organic carbon(TDOC) was investigated; COC and TDOC were determined by the high-temperature combustion method(HTC) and UV/persulphate method.
References
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Journal ArticleDOI
The distribution of colloidal and dissolved organic carbon in the Gulf of Mexico
TL;DR: In this article, the authors used a high-temperature catalytic oxidation (HTCO) method to extract colloidal organic carbon (COC) from seawater and investigate different molecular weight fractions of dissolved organic carbon.
Journal ArticleDOI
The significant role of colloids in the transport and transformation of organic carbon and associated trace metals (Cd, Cu and Ni) in the Rhône delta (France)
TL;DR: The distribution of organic C and trace elements (Cd, Cu, and Ni) between truly dissolved and colloidal phases was determined in May 1992, in order to better understand their behavior during estuarine mixing in the Rhone delta (France) as discussed by the authors.
Journal ArticleDOI
Marine submicron particles
Mark L. Wells,Edward D. Goldberg +1 more
TL;DR: In this article, the qualitative and quantitative analyses of submicron particles from coastal surface seawaters off California involved their separation by ultracentrifugation, visual examination by transmission electron microscopy (TEM), and the determination of elemental composition by energy dispersive spectroscopy.
Journal ArticleDOI
A test of the accuracy of freshwater DOC measurements by high-temperature catalytic oxidation and UV-promoted persulfate oxidation
Ronald Benner,John I. Hedges +1 more
TL;DR: In this paper, high-temperature (approximately 1100°C) oxidation of dried residues of ultrafiltered DOC in a CHN analyzer was used as a reference method to test the accuracy of DOC measurements by hightemperature catalytic oxidation (HTCO) using a Shimadzu TOC analyzer.
Journal ArticleDOI
Composition of estuarine colloidal material: organic components
TL;DR: In this article, temperature controlled stepwise pyrolysis of the freeze-dried material, followed by gas chromatographic-mass spectrometric analyses of the volatile products indicates that the primary organic components of this polymer are carbohydrates and peptides.