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Geochemical thermodynamics of cadmium removal from water with limestone
- Davis, ArdenD., Webb, CathleenJ., Sorensen, JeniferL., Dixon, DavidJ., Hudson, Roberta
- Environmental earth sciences 2018 v.77 no.2 pp. 37
- cadmium, limestone, thermodynamics
- Limestone-based material can reduce concentrations of cadmium below 0.001 mg/L (1 ppb) in water, resulting in > 99% removal efficiency. Thermodynamic constraints appear to be favorable for reactions involving the formation of otavite during cadmium removal. Thermodynamic values for these reactions yield a theoretical removal limit of 0.0015 mg/L or better for cadmium, in reasonable agreement with tests on laboratory and field samples that show cadmium removal at levels less than 0.001 mg/L.