Books : Self-cleaning in an estuarine area formerly affected by ^2^2^6Ra anthropogenic enhancements [An article from: Science of the Total Environment, The]
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Format: HTML
Label: Elsevier
Manufacturer: Elsevier
Publication Date: August 15, 2004
Publisher: Elsevier
Studio: Elsevier
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Product Description:
This digital document is a journal article from Science of the Total Environment, The, published by Elsevier in 2004. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
The estuary of the Odiel River has been affected by both direct discharges of phosphogypsum (radium enriched industrial waste) and dissolution and weathering of the exposed piles where this radium enriched waste was stored. In 1998 the waste management policy for industries changed. The direct discharges stopped and the new phosphogypsum piles were well protected against dissolution processes, avoiding any transference of radium into the environment. This work presents a study of the evolution with time (1999-2002) of the levels of ^2^2^6Ra in river water and sediment samples with the new waste management policy. A liquid scintillation technique was used to measure the ^2^2^6Ra activity concentration in sediment samples. A gas-proportional counter was also used to measure the ^2^2^6Ra activity concentration in river water samples. The main conclusion is that a systematic and continuous decrease of the activity concentration of ^2^2^6Ra with time in the Odiel River estuary is occurring. Thus, a possible self-cleaning in the estuary, once the direct waste discharges were avoided, can be inferred.
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