Sorption Model for Dissolved and Leachable Particulate Aluminium in the Great Ouse Estuary, England |
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| Authors: | S Upadhyay |
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| Institution: | (1) School of Environmental Sciences, University of East Anglia, Norwich, NR4 7TJ, UK;(2) Present address: Department of Marine Sciences, Goa University, Goa, 403206, India |
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| Abstract: | The behaviour of dissolved Al in the Great Ouse estuary, in particular with respect to salinity, is complex. There is, however,
evidence from field data as well as laboratory mixing experiments to suggest that flocculation and sorption mechanisms play
important roles affecting the concentrations of dissolved Al during the early stages of estuarine mixing. In contrast, a near-buffering
of dissolved Al occurs in the entire stretch of the estuary (salinity >0.2) with concentrations varying around 1.4 μg l−1. This distribution and lack of variation with salinity is attributable to sorption processes which might dominate over other
processes in these turbid estuarine waters (suspended particulate load 48–888 mg l−1) impacting dissolved Al levels. Sorption models have been developed for both dissolved and leachable particulate Al concentrations
in these waters. These observations provide compelling evidence of sorption processes that might be important in the geochemistry
of Al in estuarine waters. |
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