Accession Number : AD0747979

Title :   Kinetics of Carbonate-Seawater Interactions,

Corporate Author : HAWAII INST OF GEOPHYSICS HONOLULU

Personal Author(s) : Pesret,Francois

Report Date : AUG 1972

Pagination or Media Count : 76

Abstract : Most of the calcium carbonate removed from the oceans is precipitated out by pelagic organisms living in the upper layers of the world's oceans. However, only a small fraction of that amount accumulates on the ocean floor as sediments. Thus, there is the question of where the dissolution takes place. This question will not be finally answered until the chemical process of the dissolution in seawater is fully understood. Since most oceanic waters are out of equilibrium with the calcium carbonate system, it is more important to consider the kinetics of the reaction, rather than the equilibrium itself. Using the spinning disk method, an experimental set-up was devised to study the rate of dissolution of calcite in aqueous solutions. Different models were developed to describe the reaction and to estimate what chemical processes may take place. The object of this study was to compare the relative influence of individual seawater constituents such as Mg(++), Sr(++), Ba(++), Ca(++), SO4(--), PO4(3-), and dissolved organic matter, on the rate of calcite solution. (Author)

Descriptors :   (*SEA WATER, *CARBONATES), SEDIMENTATION, CALCIUM COMPOUNDS, OCEAN BOTTOM, CHEMICAL PROPERTIES, ORGANIC MATERIALS, CHEMICAL PRECIPITATION, CALCITE, ION EXCHANGE, MAGNESIUM, STRONTIUM, BARIUM, CALCIUM, SULFATES, PHOSPHATES, REACTION KINETICS, THESES

Subject Categories : Physical Chemistry
      Physical and Dynamic Oceanography

Distribution Statement : APPROVED FOR PUBLIC RELEASE