Publications by authors named "Valter Martinotti"
Article Synopsis
- Marine environments are facing ecological pressures from pollution and climate change, leading to ocean acidification, warming, and changes in nutrient cycling and sediment interactions.
- New tools, the Amerigo Lander and the Automatic Benthic Chamber (CBA), have been created to measure dissolved chemical exchanges between sediment and water, helping to study the impact of human activities on these processes.
- The Amerigo Lander is versatile for both shallow and deep waters, while the CBA focuses on continental shelf areas; both devices have been tested successfully and provide consistent data for research and environmental assessments.
A flow injection analyser coupled with a gas diffusion membrane and a conductometric microdetector was adapted for the field analysis of natural concentrations of free dissolved CO2 and dissolved inorganic carbon in natural waters and used in a number of field campaigns for marine water monitoring. The dissolved gaseous CO2 presents naturally, or that generated by acidification of the sample, is separated by diffusion using a hydrophobic semipermeable gas porous membrane, and the permeating gas is incorporated into a stream of deionised water and measured by means of an electrical conductometric microdetector. In order to make the system suitable and easy to use for in-field measurements aboard oceanographic ships, the single components of the analyser were compacted into a robust and easy to use system.
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