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Particulate and dissolved zinc concentrations in various matrices at 20°C after 0 and 24 h using ~10 mg/L Alfa Aesar 44904 (a) and consortium ZnO (b) NPs. ZnCl2 (c) was used as a dissolved zinc control to test for possible Zn precipitation in solution. Dissolved concentration was measured directly in the filter permeate; particulate concentration is calculated as ([Zn]feed-[Zn]permeate.) Total column height (black + white) represents measured feed Zn concentration.
