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DGT-based Measurement of Phosphorus in Sediment Microzones and Rhizospheres (Hardcover, 1st ed. 2016)
Loot Price: R3,567
Discovery Miles 35 670
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DGT-based Measurement of Phosphorus in Sediment Microzones and Rhizospheres (Hardcover, 1st ed. 2016)
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This book focuses on the development of DGT (diffusive gradients in
thin films) and the related techniques for measuring and
investigating the geochemical process and P transfer across the
sediment/water or sediment/root interface in lakes. A series of DGT
techniques such as new types of probes, test methods in sediment or
the rhizosphere, DIFS (DGT induced fluxes in sediments and soils)
model for kinetic P exchange, CID (computer imaging densitometry)
for S(-II), and microchelex gel/LA-ICP-MS (laser ablation
inductively coupled plasma mass spectrometry) have been developed.
The corresponding chapters on the theory and methodology of DGT,
the "internal P loading" or P transfer across sediment/root in two
lakes, provide insights into the research method and conclusions,
including the P release mechanism, the quantification of "internal
P loading", kinetic P exchange in DGT/sediment interface, Fe- or
S(-II)-microniches at submillimeter scales in sediments for the
prediction of P release, and DGT as a surrogate for the prediction
of P uptake by roots. It also offers new perspectives in the fields
of P analysis and P process in micro-interfaces in lakes using DGT
techniques. The P remobilization from Fe-bound P, the coupled
Fe-S(-II)-P geochemical reaction and algae biomass breakdown
causing P release, are elucidated using DGT methods in sediment
layers. DGT parameters and curves for time or distance derived from
DIFS can be used to assess kinetic P release in the sediment
microzone. CID and LA-ICP-MS methods deliver Fe- and S(-II) images
at submillimeter scales, which can be used for the quantification
of flux related to microniche peaks and the prediction of P release
from Fe-microniche or Fe-S(-II)-P geochemical reactions. DGT
measurements in-situ in rhizosphere or rhizonbox can give CE
(effective concentration) and CDGT values for the prediction of P
accumulated in plant tissues. This book provides a valuable
reference resource for senior graduate students, lecturers and
researchers in the fields of the geochemical process of eutrophic
elements in lakes, lake eutrophication mechanism and environmental
analysis.
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