Distribution of trace metals in sediments and the relationship with their accumulation in earthworms

摘要: Abstract Concentrations of Cd, Pb, Cu and Zn their speciation in river sediments (Guadalquivir River, Spain), were determined. Relationships between trace metal concentrations earthworms studied order to estimate the rate at which metals accumulated organisms living sediments. The bioavailable fraction Cd represented more than 50 % total found sediments, this percentage was much greater those other elements examined. Most present organic residual fractions. Lead mainly associated with crystalline iron oxide fraction. application factorial analysis heavy some soil properties reduced number original variables only three, namely factors, explained variance 94 %. Metals related by a second grade polynomial equation fractions where bound. exhibited highest accumulati...