Overview
Esplandiu and colleagues engineered Nafion micropumps that use ionic gradients to drive water flows and demonstrated cadmium capture in aqueous solution. This is in-scope lane a2 remediation evidence rather than food occurrence evidence.
Key numbers
Table 1 reports cadmium concentration changes after interaction with the Nafion structures. For CdCl2 alone, Cd2+ decreased from 11.0 mg/L to 0.3 mg/L, a 97% change. For CdCl2 + NaCl at lower sodium loading, Cd2+ decreased from 11.0 mg/L to 0.2 mg/L, a 98% change while Na+ fell from 2.3 mg/L to 2.0 mg/L, a 13% change. For CdCl2 + NaCl at higher sodium loading, Cd2+ decreased from 11.0 mg/L to 0.4 mg/L, a 96% change while Na+ fell from 23.0 mg/L to 21.0 mg/L, a 9% change.
The methods section states ICP-OES cadmium calibration standards at 0.25, 1, 2.5, and 5 ppm in 1% HNO3.
Methods (brief)
The paper fabricated and tested Nafion microarrays that generate electroosmotic flows through local chemical and electric-field gradients. Cadmium and sodium concentrations before and after interaction were measured by ICP-OES. The work combines experiments with simulations and focuses on water-purification performance and pump directionality.
Related evidence
Update history
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