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Formation of marine barite (BaSO 4 ) concurrent with dissolution of acantharian celestite (Sr/Ba, SO 4 ) was examined under laboratory conditions in this work. Acantharian cysts, composed of barium-enriched celestite (Ba/Sr mole fraction ~0.003), were allowed to react for 21-158 days in small volumes of natural seawater (20 to 100 μl) sealed within Teflon tubes. In 17 trials, three...
The distribution and chemical form of iron in marine environments is of particular interest to oceanographers because of its effect on primary productivity. The high abundance of viruses in the ocean and their small size suggest that they might serve as nucleation centers for iron adsorption and precipitation in the ocean. Hence, we performed laboratory experiments to quantify the adsorption and precipitation...
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