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The heteroaggregation and deposition behavior of nanoplastics on Al2O3 in aquatic environments

Journal of Hazardous Materials 2022 38 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 40 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Quanyun Ye, Leiye Sun, Jiayan Wu, Jiayan Wu, Jiayan Wu, Leiye Sun, Jiayan Wu, Pingxiao Wu, Quanyun Ye, Jiayan Wu, Leiye Sun, Leiye Sun, Jiayan Wu, Quanyun Ye, Pingxiao Wu, Jiayan Wu, Jieyu Liu, Leiye Sun, Quanyun Ye, Quanyun Ye, Quanyun Ye, Quanyun Ye, Jiayan Wu, Jiayan Wu, Jiayan Wu, Jiayan Wu, Pingxiao Wu, Pingxiao Wu, Pingxiao Wu, Leiye Sun, Leiye Sun, Pingxiao Wu, Pingxiao Wu, Jiayan Wu, Leiye Sun, Jiayan Wu, Quanyun Ye, Pingxiao Wu, Jiayan Wu, Leiye Sun, Quanyun Ye, Leiye Sun, Meiqing Chen, Meiqing Chen, Meiqing Chen, Leiye Sun, Leiye Sun, Meiqing Chen, Meiqing Chen, Meiqing Chen, Pingxiao Wu, Leiye Sun, Jiayan Wu, Leiye Sun, Leiye Sun, Jiayan Wu, Leiye Sun, Leiye Sun, Leiye Sun, Jiayan Wu, Quanyun Ye, Jieyu Liu, Zhongbo Shang, Leiye Sun, Leiye Sun, Leiye Sun, Leiye Sun, Zhongbo Shang, Leiye Sun, Zhongbo Shang, Zhongbo Shang, Meiqing Chen, Meiqing Chen, Zhongbo Shang, Leiye Sun, Zhongbo Shang, Meiqing Chen, Leiye Sun, Meiqing Chen, Pingxiao Wu, Leiye Sun, Jieyu Liu, Zhongbo Shang, Zhongbo Shang, Jieyu Liu, Jiayan Wu, Zhongbo Shang, Zhongbo Shang, Jieyu Liu, Jieyu Liu, Pingxiao Wu, Pingxiao Wu, Quanyun Ye, Pingxiao Wu, Pingxiao Wu, Pingxiao Wu, Quanyun Ye, Jieyu Liu, Nengwu Zhu Pingxiao Wu, Nengwu Zhu Quanyun Ye, Nengwu Zhu Pingxiao Wu, Nengwu Zhu Nengwu Zhu Nengwu Zhu Nengwu Zhu Pingxiao Wu, Pingxiao Wu, Quanyun Ye, Quanyun Ye, Nengwu Zhu Nengwu Zhu

Summary

Researchers systematically investigated heteroaggregation between polystyrene nanoplastics and aluminum oxide particles in aquatic environments, finding significant aggregation under acidic and neutral conditions that increased with ionic strength. Humic acid and fulvic acid inhibited deposition of nanoplastics onto aluminum oxide surfaces through charge reversal and steric repulsion, with humic acid being more effective.

Polymers

The ubiquitous AlO is anticipated to interact with nanoplastics, affecting their fate and transport in aquatic environments. In this study, the heteroaggregation and deposition behaviors of polystyrene nanoplastics (PSNPs) on AlO were systematically investigated under different conditions (ionic strength, pH, and natural organic matter). The results showed that significant heteroaggregation occurred between PSNPs and AlO particles under acidic and neutral conditions. When the NaCl concentration was increased from 50 to 500 mM, the heteroaggregation ratio gradually increased. However, poly (acrylic acid) (PAA) inhibited the heteroaggregation of PSNPs-AlO due to steric repulsion. The deposition of PSNPs on AlO surfaces was inhibited as the NaCl concentration or pH values increased. Due to charge reversal and steric repulsion, humic acid (HA) and fulvic acid (FA) prevented the deposition of PSNPs onto AlO surfaces, and the former was more effective in reducing the deposition rate. The interaction mechanism between PSNPs and AlO was revealed by using various characterization techniques and density function theory (DFT) calculation. The results demonstrated that in addition to the dominant electrostatic interaction, there were also weak hydrogen bonds and van der Waals interactions. Our research is of great significance for predicting the migration and fate of PSNPs in aquatic environments.

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