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    Radium in baggerspecie afkomstig uit het Rijnmondgebied; resultaten over 1997

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    Authors
    Lembrechts J
    Glastra P
    Stoop P
    Type
    Report
    Language
    nl
    
    Metadata
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    Title
    Radium in baggerspecie afkomstig uit het Rijnmondgebied; resultaten over 1997
    Translated Title
    Analysis of radium in sediment samples from the Rhine delta over 1997
    Publiekssamenvatting
    Van 18 havenspeciemonsters die in 1997 zijn verzameld in de Rotterdamse havens en in de Nieuwe Waterweg, is het 226Ra-gehalte en de korrelgrootte-verdeling bepaald. Hieruit is afgeleid hoe groot de invloed op het 226Ra-gehalte is van lozingen door de fosfaaterts-verwerkende industrie. Zoals in eerdere meetcampagnes is vastgesteld, is de invloed van de industrie vooral merkbaar in de omgeving van en in de eerste en tweede Petroleumhaven. Verhogingen van het 226Ra-gehalte tot maximaal 211 Bq/kg zijn gemeten ten opzichte van een achtergrond varierend tussen 22 en 46 Bq/kg. Van het geloosde 226Ra blijft naar schatting 13% in de havens achter. De jaarlijks verzamelde monsters lijken de langjarige trend in de lozingen te weerspiegelen.
    Eighteen sediment samples collected in 1997 in the harbours and waterways of the Rhine delta were analysed for their 226Ra content and grain-size distribution. The effect of the emissions from the phosphate-processing industries on the 226Ra content could be inferred on the basis of these data. As observed in previous monitoring campaigns, the influence of this industry is greatest in and nearby the first and second petroleum harbours. Increases in the 226Ra content of up to 211 Bq/kg were measured in comparison to background levels of 22 to 46 Bq/kg. Approximately 13% of the released 226Ra is deposited in the harbours and waterways. Samples collected once every year were found to reflect the long-term trend in the emissions.
    Sponsors
    DGM/SVS
    URI
    http://hdl.handle.net/10029/257458
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