Using FLOWFFF and HPSEC to determine trace metal–colloid associations in wetland runoff

摘要: Abstract Natural organic matter (NOM) and iron colloids can coexist in surface water. These might exhibit different affinities to metals metalloids. Previously it has been shown, that inorganic the low nanometer range be fractionated using Flow Field-Flow Fractionation analyzes (FlowFFF), but is not yet understood how presence of influences results obtained by High Performance Size Exclusion Chromatography (HPSEC). Studies compare use these size-separation techniques for associated elements are needed order interpret either methods. Therefore, associations between from a small stream draining wetland area selected (Fe, Al, Ti, Pb, Cu, Ni, As, U, Rare Earth Elements (REE)) have investigated. FlowFFF HPSEC were combined with ultrafiltration, functional group titration arsenic speciation analysis. NOM and, sample pH > 5.2, slightly larger organo-mineral colloids, present