Diffusion coefficients of major ions in seawater |
| |
Authors: | A Poisson A Papaud |
| |
Institution: | Laboratoire de Physique et Chimie Marines de l''Université Paris VI, Tour 24, 4 place Jussieu, 75230 Paris Cedex 05 France |
| |
Abstract: | Self-diffusion coefficients of five major ions have been determined by a radioactive tracer method (capillary tube method) in seawater of salinity 34.86 at 25°C. Data are presented for Na+, Ca2+, Cl−, SO42, and HCO3−, which constitute about 95% by weight of sea salt. The influence of temperature and salinity on these coefficients has been studied for Na+ and Cl− which are the major components of sea salt: self-diffusion coefficients of these two ions have been measured in seawater, at different temperatures for a salinity of 34.86 and at different salinities for a temperature of 25°C. Diffusion coefficients of the same ions have been determined at 25°C by using another radioactive tracer method (quasi-steady cell method). In this experiment, seawater ions were allowed to diffuse from natural seawater into dilute seawater. Data have been obtained at 25°C for Na+, Ca 2+, Cl−, SO42− and HCO3−, corresponding to different salinity gradients. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|