6533b861fe1ef96bd12c4e70
RESEARCH PRODUCT
Heavy metals in rivers of Latvia☆
Valery RodinovInta KlavinaElga PareleAgrita BriedeMaris KlavinsIlga Kokoritesubject
PollutionGeologic SedimentsEnvironmental Engineeringmedia_common.quotation_subjectFresh WaterMetalchemistry.chemical_compoundMetals HeavyAnimalsEnvironmental ChemistrySeawaterOrganic matterWater pollutionWaste Management and Disposalmedia_commonchemistry.chemical_classificationHydrologyWater PollutionSedimentLatviaPollutionchemistryMolluscavisual_artEnvironmental chemistryvisual_art.visual_art_mediumEnvironmental scienceCarbonateWater qualitySurface waterWater Pollutants Chemicaldescription
Abstract Total heavy metal concentrations in waters and sediments (HNO 3 digestible Pb, Cu, Co, Ni, Mn, Zn) and their speciation forms in sediments (exchangeable, carbonate bound, iron–manganese oxide bound, organic matter bound and residual) in major and common small watercourses (31 sampling stations) along their flow in Latvia were determined. The metal loads entering the Baltic Sea from Latvia were calculated. Increased metal concentrations were found only in lower reaches of the largest rivers and locally around known industrial pollution sources. Differences in metal concentrations and loads in rivers from different regions of Latvia were related to natural geochemical processes. Metal speciation analysis showed that the dominant metal species are residual metals and those bound to organic matter. Residual and carbonate-bound metal dominated only in rhitral regions of rivers. The concentrations of exchangeable metals increased below pollution sources.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2000-11-04 | Science of The Total Environment |