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Total and soluble Cd release from QD-embedded polymer in the presence of SHA and SFA (points) and correction of the soluble release for Cd2+ bound to NOM (dashed lines). Experiments were conducted in the dark for 30 days. The correction was calculated from the Langmuir-Freundlich isotherms in Fig. 6, and strongly suggests the difference between total and soluble Cd is due to adsorption on NOM.
