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In the period from 1950 to 1994, most of the mercury discharged to the Lagoon of Aveiro was retained in the sediments of a small area of around 1.7 km 2 (25.4 10 3 kg, about 77% of the total), which corresponds to the Estarreja Channel plus a basin named Laranjo Basin located downstream. In 1994, the mercury concentration in surface sediments of the area ranged from 2.3 to 343 μg...
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