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Total Hg concentrations were measured in bulk atmospheric deposition from three sampling stations along the Rio de Janeiro State coast, Southeast, Brazil, from October 1998 to December 1999. Samples were collected at Campos dos Goytacazes, an agriculture center at the North coast; Niteroi, an industrialized metropolitan area and at Itacuruca, a tourist town at the South. Concentrations at Campos average 0.51 ng L-1, ranging from 0.07 to 1.01 ng L-1, and showed a seasonal trend, probably affected by burning of sugar cane plantations in winter. At Niteroi, concentrations were highest, averaging 0.73 ng L-1 and ranging from 0.06 to 2.95 ng L-1. No pattern of temporal variation was observed and concentration peaks are probably related to industrial emissions. At Itacuruca, Hg concentrations were below the detection limit of the method (0.02 ng L-1) in 35% of the samples, with an average of 0.24 ng L-1 and ranging from <0.02 to 1.04 ng L-1.

Mercury Concentrations in Bulk Atmospheric Deposition over the Coast of Rio de Janeiro, Southeast, Brazil