Concentration and Bioavailability of Heavy Metals in Sediments from Niterói Harbour (Guanabara Bay/S.E. Brazil)

摘要: Abstract The coastal area of Niteroi is marked by intensive naval activities and holds one the countries main estates. harbour dockyards have been sited in international literature as potential sources sinks for accumulation heavy metals hence contaminated sediments. aim this paper to assess concentrations Harbour verify their bioavailability determining catalytic effects bacteria using esterase activity (EST) electron transport system (ETSA). Samples were analysed Ni, Zn, Pb, Cr Cu normalisation procedures used whether represent background or contamination sediment. Heavy metal concentrations, especially Cu, Zn Pb found be much higher than natural levels index “geoaccumulation” shows moderate extreme contamination. However, absence inhibition dehydrogenase indicated that h...