18–23 Apr 2010
Casino Conference Centre
UTC timezone

The adsorptive behaviour of cadmium on clays

20 Apr 2010, 10:30
20m
Mirror Hall (Casino Conference Centre)

Mirror Hall

Casino Conference Centre

Reitenbergerova 4/95, Marianske Lazne, Czech Republic
Verbal Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management 3

Speaker

Dr Sneh Jain (Loughborough University)

Description

Heavy metals present in the environment such as cadmium are considered harmful due to their toxicity. Adsorption-desorption reactions of metals from aqueous solutions to the soil play an important role in influencing the accumulation and transport of metal contaminants. These are affected by the surface and chemical properties of the soil components. Sorption and desorption of Cd2+ has been examined on a series of clays bentonite, illite, illite-smectite, kaolin and montmorillonite through γ-spectroscopy as a function of pH and ionic strength. Experimental data acquired for the systems studied have been used to determine the isotherms. The order of increasing cadmium adsorption onto the clays in the absence of organic matter has been found to be: illite<≈ kaolin< montmorillonite< illite-smectite< bentonite Further, to gain mechanistic insights to the sorption and desorption processes NMR and XRD have been used to probe these systems.

Primary author

Dr Sneh Jain (Loughborough University)

Co-authors

Ms Maria Charalambous (Loughborough University) Dr Nick Evans (Loughborough University)

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