What the study found
The study found that per- and polyfluoroalkyl substances, or PFAS, can form nanoclusters when they interact with naturally extracted dissolved organic matter, or DOM. The authors report that this clustered state is linked to reduced PFAS uptake and lower toxicity in rice seedlings.
Why the authors say this matters
The authors conclude that DOM-induced nanoclustering is a critical interface process that affects the bioaccessibility and risks of PFAS. They suggest this finding offers a new perspective for environmental assessment and remediation.
What the researchers tested
The researchers used a new set of in situ atomic force microscope, or AFM, techniques to visualize PFAS behavior at the interface of naturally extracted DOM. They also probed intermolecular interactions and carried out plant exposure experiments in rice seedlings.
What worked and what didn't
The AFM observations showed dynamic formation of PFAS nanoclusters at the DOM interface. Strong binding between PFAS molecules and specific DOM functional groups was associated with many small nanoclusters, while weaker interactions were associated with larger, sparser clusters; the size and abundance of nanoclusters were strongly negatively correlated across PFAS structures (R = −0.983, P = 0.017). Compared with molecularly dispersed PFAS, nanoclustered PFAS showed significantly reduced uptake and were sequestered on root surfaces as a physical barrier.
What to keep in mind
The abstract does not describe limitations in detail. The findings are based on naturally extracted DOM, the AFM methods used in this study, and rice seedling exposure experiments, so the scope described in the abstract is limited to those conditions.
Key points
- PFAS were observed forming nanoclusters at the interface of dissolved organic matter.
- Strong PFAS-DOM binding was linked to smaller, more numerous nanoclusters.
- Weaker interactions were linked to larger, sparser nanoclusters.
- Nanocluster size and abundance showed a strong negative correlation across PFAS structures.
- Nanoclustered PFAS had reduced uptake in rice seedlings and were sequestered on root surfaces.
- The authors describe DOM-induced nanoclustering as important for PFAS bioaccessibility and risk.
Disclosure
- Research title:
- DOM forms PFAS nanoclusters and reduces rice seedling toxicity
- Authors:
- Xinfei Ge, Kun Wang, Xin Xiao, Chiheng Chu, Xiaoying Zhu, Baoliang Chen
- Institutions:
- Yangtze River Delta Physics Research Center (China), Yangtze River Delta Physics Research Center (China), Yangtze River Delta Physics Research Center (China), Zhejiang University, Zhejiang University, Zhejiang University, Zhejiang University, Zhejiang University, Zhejiang University
- Publication date:
- 2026-02-23
- OpenAlex record:
- View
- Image credit:
- Photo by Leonhard_Niederwimmer on Pixabay · Pixabay License
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