Procedures are described whereby zinc and copper present as cations in seawater are brought to the surface in less than 5 min by an adsorption colloid flotation process which utilizes a negatively charged ferric hydroxide collector, a cationic surfactant, dodecylamine, and air. Statistical studies on test series show a mean recovery of 94.0% with a relative standard deviation of 6.1% for zinc and a mean recovery of 95.0% with a relative standard deviation of 6.1% for copper.
No takes yet. Share an insight, caveat, or question.
Kim et al. (1972) studied this question.
Synapse has enriched 2 closely related papers on similar clinical questions. Consider them for comparative context: