Nanoplastic pollution poses a significant threat to both global ecosystems and human health, but its effective remediation is challenging due to the size and low environmental concentrations of nanoplastics. Here, the authors show that an alginate cryogel can rapidly aggregate 50–200 nm particles into micrometer-sized clusters, enabling efficient removal through conventional membrane filtration due to a combination of weakly bound alginate leaching upon cryogel rehydration and localized Ca²⁺ release from the cryogel.
- A-Reum Kim
- Aline Braz Ramirez
- Boxin Zhao
