scholarly journals Low volume quantification of dissolved organic carbon and dissolved nitrogen

2012 ◽  
Vol 10 (5) ◽  
pp. 347-352 ◽  
Author(s):  
Aron Stubbins ◽  
Thorsten Dittmar
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Dissolved Nitrogen ◽  
Low Volume

Dynamics of dissolved organic carbon and total dissolved nitrogen in Maryland's coastal bays

2015 ◽  
Vol 164 ◽  
pp. 451-462 ◽  
Author(s):  
Shuiwang Duan ◽  
Nianhong Chen ◽  
Sujay S. Kaushal ◽  
Paulinus Chigbu ◽  
Ali Ishaque ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Coastal Bays ◽  
Dissolved Nitrogen ◽  
Total Dissolved Nitrogen

scholarly journals Dissolved organic carbon and dissolved nitrogen in soil under different fertilization treatments

2011 ◽  
Vol 52 (No. 2) ◽  
pp. 55-63 ◽  
Author(s):  
S.S. Gonet ◽  
B. Debska
Keyword(s):  
Surface Layer ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Cattle Slurry ◽  
Soil Horizons ◽  
Mineral Fertilization ◽  
Labile Organic Matter ◽  
Dissolved Nitrogen ◽  
After Effect

The objective of the study was to evaluate the effects of long-term fertilization of a sandy soil with differentiated doses of cattle slurry as well as its after-effect action on the possibilities of migration of dissolved organic carbon (DOC) and dissolved nitrogen (DNt) down to deeper layers of the soil profile. DOC and DNt were extracted with borate buffer and 0.004M CaCl<sub>2</sub> solution. Evaluation of effects of cattle slurry on the content of DOC and DNt was done in comparison with mineral fertilization. It was shown that the use of cattle slurry in the doses of 100 and 200&nbsp;m<sup>3</sup>/ha caused a significant increase of labile organic matter in the 0&ndash;25 and 25&ndash;50 cm layers of soil. As compared with mineral fertilization the application of slurry increased also the amounts of extracted DNt, but only in the surface layer. The DNt content in the deeper soil horizons did not depend on the kind of fertilization. Concentrations of DOC and DNt in the extracts depended not only on their content in soil but it was also modified substantially by the extractant used.

scholarly journals Simultaneous Determination of Dissolved Organic Carbon and Total Dissolved Nitrogen on a Coupled High-Temperature Combustion Total Organic Carbon-Nitrogen Chemiluminescence Detection (HTC TOC-NCD) System

2005 ◽  
Vol 2005 (4) ◽  
pp. 240-246 ◽  
Author(s):  
Xi Pan ◽  
Richard Sanders ◽  
Alan D. Tappin ◽  
Paul J. Worsfold ◽  
Eric P. Achterberg
Keyword(s):  
High Temperature ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Data Acquisition ◽  
Simultaneous Determination ◽  
Dissolved Nitrogen ◽  
Total Dissolved Nitrogen ◽  
Temperature Combustion ◽  
High Temperature Combustion

The marine biogeochemistries of carbon and nitrogen have come under increased scrutiny because of their close involvement in climate change and coastal eutrophication. Recent studies have shown that the high-temperature combustion (HTC) technique is suitable for routine analyses of dissolved organic matter due to its good oxidation efficiency, high sensitivity, and precision. In our laboratory, a coupled HTC TOC-NCD system with a sample changer was used for the automated and simultaneous determination of dissolved organic carbon (DOC) and total dissolved nitrogen (TDN) in seawater samples. TOC control software was used for TOC instrument control, DOC data acquisition, and data analysis. TDN data acquisition and manipulation was undertaken under LabVIEW. The combined system allowed simultaneous determination of DOC and TDN in the same sample using a single injection and provided low detection limits and excellent linear ranges for both DOC and TDN. The risk of contamination has been remarkably reduced due to the minimal sample manipulation and automated analyses. The optimised system provided a reliable tool for the routine determination of DOC and TDN in marine waters.

scholarly journals Correction to: Influence of Biochar from Slow Pyrolysis on Dissolved Organic Carbon and Total Dissolved Nitrogen Levels of Urban Storm-Water Runoff

2018 ◽  
Vol 229 (8) ◽  
Author(s):  
Enrico Mancinelli ◽  
Edita Baltrėnaitė ◽  
Pranas Baltrėnas ◽  
Raimondas Grubliauskas ◽  
Eglė Marčiulaitienė ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Storm Water ◽  
Water Runoff ◽  
Slow Pyrolysis ◽  
Nitrogen Levels ◽  
Dissolved Nitrogen ◽  
Total Dissolved Nitrogen ◽  
Storm Water Runoff ◽  
Urban Storm

Responses of dissolved organic carbon and dissolved nitrogen in surface water and soil to CO2 enrichment in paddy field

2011 ◽  
Vol 140 (1-2) ◽  
pp. 273-279 ◽  
Author(s):  
Jia Guo ◽  
Mingqian Zhang ◽  
Li Zhang ◽  
Aixing Deng ◽  
Xinmin Bian ◽  
...  
Keyword(s):  
Surface Water ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Paddy Field ◽  
Co2 Enrichment ◽  
Dissolved Nitrogen

scholarly journals The importance of riparian zones on stream carbon and nitrogen export in a temperate, agricultural dominated landscape

2012 ◽  
Vol 9 (6) ◽  
pp. 7465-7497 ◽  
Author(s):  
T. Wohlfart ◽  
J.-F. Exbrayat ◽  
K. Schelde ◽  
B. Christen ◽  
T. Dalgaard ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Dissolved Organic Nitrogen ◽  
Organic Nitrogen ◽  
Agricultural Land ◽  
Stream Water ◽  
Soil Types ◽  
Organic Soils ◽  
Dissolved Nitrogen ◽  
Total Dissolved Nitrogen

Abstract. The surrounding landscape of a stream has crucial impacts on the aquatic environment. This study pictures the hydro-biogeochemical situation of the Tyrebaekken creek catchment in central Jutland, Denmark. The intensively managed agricultural landscape is dominated by rotational croplands. One northern and one southern stream run through the catchment before converging to form a second order brook. The small catchments mainly consist of sandy soil types besides organic soils along the riparian zone of the streams. The aim of the study was to characterise the relative influence of soil type and land use on stream water quality. Nine snapshot sampling campaigns were undertaken during the growing season of 2009. On each sampling day, 20 points along the stream were sampled as well as eight drain outlets and two groundwater wells. Total dissolved nitrogen, nitrate, ammonium nitrogen and dissolved organic carbon (DOC) concentrations were measured and dissolved organic nitrogen (DON) was calculated for each grabbed sample. Electro-conductivity, pH and flow velocity were measured during sampling. Statistical analyses showed significant differences between the northern, southern and converged stream parts, especially for nitrate concentrations with average values of 9.6 mg N l−1, 1.4 mg N l−1 and 3.0 mg N l−1, respectively. Furthermore, throughout the sampling period DON concentrations increased from 0.1 mg N l−1 to 2.8 mg N l−1 and from 0.1 mg N l−1 to 0.8 mg N l−1in the northern and southern streams, respectively. This corresponded to a contribution of up to 81% to total dissolved nitrogen. Multiple-linear regression analyses performed between chemical data and landscape charateristics showed a significant negative influence of organic soils on instream N concentrations and corresponding losses in spite of their overall minor share of the agricultural land (12.9%). On the other hand, organic soil frequency was positively correlated to the corresponding dissolved organic carbon concentrations. Croplands also had a significant influence but with weaker correlations. For our case study we conclude that soil types and corresponding biogeochemical properties have a major influence on stream water chemistry. Meanwhile, the contribution of dissolved organic nitrogen to the total nitrogen budget was substantial in this agricultural dominated landscape.

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