Sediments, organic carbon, nitrogen

Ratios of Organic Carbon, Nitrogen, and Hydrogen in Recent Sediments... 

The object of the present study was to measure the ratios of organic carbon, nitrogen, and hydrogen in the detritus sinking in lake water and in the sediments and to discuss the decomposition processes of these components in order to gain basic knowledge concerning the mechanism of coal formation. 

TabU XI. Vertical Variation of Organic Carbon, Nitrogen, and Hydrogen in a Core Sample of Sediments from Lake Kizaki-ko, Which Was Previously Dried8... 

NedweU, D. B., Blackburn, T. H., and Wiebe, W. J. (1994). Dynamic nature of the turnover of organic carbon, nitrogen and sulphur in the sediments of a Jamaican mangrove forest. Mar. Ecol. Prog. Ser. 110, 223-231. 

Hites RK, Day HR (1992) Unusual persistence of DDTs in some western USA soils. Bull Environ Contam Toxicol 48(2) 259-264 Hong HS, Xu L, Guo LD (1996) Geochemistry of organic carbon, nitrogen, phosphate and silicon in sediments of southern Taiwan Strait. Research Symposium on Marine Biogeochemistry, pp.31-38... 

Jonsson, A. M. Jansson, 1997. Sedimentation and mineralisation of organic carbon, nitrogen and phosphorus in a large humic lake northern Sweden. Arch. Hydrobiol. 141 45-65. 

The annual primary production of organic carbon through photosynthesis is on the order of 70 Pg/yr. The major part of this carbon is decomposed or respired in a process that also involves the biogeochemical transformation of nitrogen, sulfur, and many other elements. Only a small part of the annual primary production of organic carbon escapes decomposition and is buried in marine sediments. On average. 

Suppliers of visible spectrophotometers are reviewed in Table 1.1. Spectroscopic methods are applicable to the determination of phenols, chlorophenols, amines, mixtures of organics, boron, halogens, total nitrogen and total phosphorus in soils, cationic surfactants, carbohydrates, total nitrogen, phosphorus and sulphur in non-saline sediments, boron, total organic carbon, total sulphur and arsenic in saline sediments, cationic surfactants, adenosine triphosphate and total organic carbon in sludges. 

This technique has found very limited applications in soil and sediment analysis and is particularly useful when routine automated analyses at the mg L 1 level of large numbers of samples is required. The technique has been applied to the determination of total phosphorus, total organic carbon and total nitrogen in soils, total organic carbon in non-saline sediments and total sulphur in saline sediments. 

Combustion methods have been used to determine total sulphur and total organic carbon and total halides in soil, total and particulate organic carbon, total halide, phosphorus and nitrogen, total and particulate organic carbon in saline sediments and total nitrogen in sludges. 

Each of the sediment based reference materials recommended in Chapter 4 should be certified for both inorganic and organic carbon concentration, total nitrogen concentration, S13C of both the inorganic and the... 

Verado, D.J., P.N. Froelich, and A. McIntyre. 1990. Determination of organic carbon and nitrogen in marine sediments using the Carlo Erba NA-1500 Analyzer. Deep-Sea Research 37 157-165. 

Yamamuro, M., and H. Kayanne. 1995. Rapid direct determination of organic carbon and nitrogen in carbonate-bearing sediments with a Yanaco MT-5 CHN analyzer. Limnology and Oceanography 40(5) 1001-1005. 

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