Liquid Discharge to Sea/Rivers/Lakes. The Solubility of TBP/OK in Aqueous Media

摘要

The solubility of tributyl phosphate/odourless kerosene (TBP/OK) in aqueous media has been investigated in order to provide information about the solubility of reprocessing plant solvent in liquid effluents and sea water. In an attempt to supplement sparse and often inconsistent data reported in the literature, an experimental programme to study the solubility of nominally 20% TBP/OK in solutions of pH 2 to 10 and in sea water for the temperature range 0 to 20 deg C was carried out. The solubility of the diluent (OK) alone was also studied in Analar and sea water solutions over a similar temperature range. A phosphorus-32 radioactive labelling technique was adopted as the initial method for measuring TBP solubility. Radiometric methods have been used extensively for the determination of slightly soluble compounds in liquid systems, and this was considered to be a potentially more convenient and accurate technique than either chemical or physical methods such as chromatography or spectroscopy. However, because of the apparently 'high' TBP solubilities obtained, repeat experiments using gas chromatography (G.C) analysis were subsequently carried out; this also enabled the solubility of the diluent OK to be simultaneously measured. The results obtained from both analytical techniques have been reported and compared. (Atomindex citation 17:021518)