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Concentrations, speciation, and ecological risk of heavy metals in the sediment of the Songhua River in an urban area with petrochemical industries

Environmental ChemistryEcological RiskEngineeringSediment QualityMetalloid ContaminationMetal ContaminationTrace MetalHeavy MetalsWater QualityMetal ToxicityEcotoxicologyEnvironmental ToxicologySedimentologySediment TransportSonghua River