Overview
This study characterized the sorption of palladium(II) and platinum(IV) on polyethylene microplastics in natural Polish lake water. Kinetic and isotherm experiments were conducted across a range of Pd concentrations (10-2000 ng/mL). The work establishes that microplastics can act as secondary transport vectors for PGEs in aquatic environments, potentially modifying bioavailability and exposure pathways.
Key numbers
- Pd(II) concentrations tested: 10-2000 ng/mL
- Lake water chemistry: pH 7.63, conductivity 345-443 uS/cm, class II-III surface water purity (Poland)
- Intraparticle diffusion model R2 for Pd: 0.4169-0.9897 (variable fit across conditions)
- Adsorption isotherm experiments at model solution pH 8 and lake water pH 7.6
- Microplastics: polyethylene (PE-MPs)
Methods (brief)
Batch sorption experiments with polyethylene microplastics (PE-MPs) at defined Pd and Pt concentrations. Natural lake water used as the medium alongside model solutions. Kinetic experiments with sampling at multiple timepoints. Isotherm experiments across the concentration range. ICP-MS for solution-phase Pd quantification. Multiple kinetic models applied (pseudo-first order, pseudo-second order, intraparticle diffusion).
Implications
This page makes the source discoverable for palladium evidence routing. Demonstrates that polyethylene microplastics sorb Pd from natural lake water, establishing a pathway for microplastic-facilitated Pd transport in freshwater environments relevant to food chain transfer via aquatic organisms.
Related evidence
Update history
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