Biogeochemistry of Intertidal Sediments (Cambridge by T. D. Jickells, J. E. Rae

By T. D. Jickells, J. E. Rae

This authoritative quantity comprises contributions from quite a lot of researchers of intertidal sediments. person chapters discover the underlying biogeochemical procedures controlling the habit of carbon, the food nitrogen and phosphorus, and contaminants reminiscent of poisonous organics, hint metals and synthetic radionuclides in intertidal environments. The biogeochemistry of those environments is necessary to knowing their ecology and administration. all the chapters contains a accomplished evaluation and the result of contemporary learn. The participants are lively researchers during this different and ecologically very important box. this article is especially for researchers and bosses operating with intertidal sediments, however it also will function a worthwhile senior undergraduate and graduate reference textual content in environmental chemistry, environmental technological know-how, earth technology, and oceanography.

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500 * " * 50 400 •* • ~l 0 (a) • i i i i 1 . i . | 1 i i 50 100 . i 1 i i • - "i 150 Distance downstream (km) i i i i i . 50 0 • i i i i i i . 2 (a) Spatial (downstream) variation in grain-size corrected concentrations of zinc and copper, in surface sediments from the Seven Estuary, UK (after French, 1993a). ] (b) Spatial (downstream) variation in trace metal concentrations of sediments from the Rhine Estuary, expressed as percentages of the contents in fluvial sediments (after de Groot, 1976).

Exchangeable, carbonate, Fe and Mn oxide and hydroxide, organic, and residual. It must be noted that all such extraction techniques are largely empirical, and the limitations of the approach must always be recognised in data interpretation (Martin, Nirel & Thomas, 1987; Kheboian & Bauer, 1987; Nirel & Morel, 1990; Whalley & Grant, 1994). The third and most recent technique for investigating the binding sites for trace metals in sediments involves the use of computer modelling. The model GEOCHEM (Mattigod & Sposito, 1979) goes some way to establishing speciation in waters, sediments and soils but it does have shortcomings, not least because it ignores the macroionic nature of fulvic and humic acids.

1963) Geochronology with 2 1 0 Pb. In Radioactive Dating, International Atomic Energy Agency, Vienna. , Koide, M. & Windom, H. (1979) Pollution history of the Savannah River Estuary. Environmental Science and Technology 3, 588-94. D. (1972) Chemistry and occurrence of cadmium and zinc in surface water and groundwater. Water Resources Research 8, 661-79. Kheboian, C. F. (1987) Accuracy of selective extraction procedures for metal speciation in model aquatic sediments. Analytic Chemistry 59, 1417-23.

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