Removal of hexavalent chromium from estuarine waters by model substrates and natural sediments

The removal of chromates has been investigated from waters of salinities ranging from zero to 32 per thou, using the model substrates, alumina and kaolinite, and natural estuarine sediments. The results indicate that sediment concentrations of more than 1 g per litre are needed to remove significant...

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Bibliographic Details
Published in:Environmental science & technology 1981-12, Vol.15 (12), p.1482-1484
Main Authors: Mayer, Lawrence M, Schick, Linda L
Format: Article
Language:English
Subjects:
Brackish
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Summary:The removal of chromates has been investigated from waters of salinities ranging from zero to 32 per thou, using the model substrates, alumina and kaolinite, and natural estuarine sediments. The results indicate that sediment concentrations of more than 1 g per litre are needed to remove significant amounts of chromate from a 1 uM solution. Chromate removal is more effective in low than in high salinity water. Removal of estuarine sediments shows a peak in the 0.1-1.0 per thou salinity range, attributed to reductive adsorption by the sediments. Chromate removal was not significantly affected by naturally occurring levels of phosphate and silicate.
ISSN:0013-936X
1520-5851
DOI:10.1021/es00094a009