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The Ultraviolet Irradiation Aging Characteristics of Microplastics in Soil under the Action of Biochar

Journal of Agricultural and Food Chemistry 2025 1 citation ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 43 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Fudong Zhang, Jinnan Xiao, Jinnan Xiao, Jinnan Xiao, Jinnan Xiao, Jinnan Xiao, Jinnan Xiao, Zhenming Zhang, Fudong Zhang, Fudong Zhang, Jinnan Xiao, Jinnan Xiao, Zhenming Zhang, Zhenming Zhang, Jinnan Xiao, Zhenming Zhang, Jinnan Xiao, Jinnan Xiao, Fupeng Li, Fupeng Li, Jinnan Xiao, Fudong Zhang, Bing He, Bing He, Bing He, Zhenming Zhang, Zhenming Zhang, Zhenming Zhang, Zhenming Zhang, Zhenming Zhang, Zhenming Zhang, Zhenming Zhang, Bing He, Zhenming Zhang, Zhenming Zhang, Zhenming Zhang, Zhenming Zhang, Zhenming Zhang, Zhenming Zhang, Jinnan Xiao, Zhenming Zhang, Zhenming Zhang, Zhenming Zhang, Zhenming Zhang, Jinnan Xiao, Fudong Zhang, Fudong Zhang, Fupeng Li, Fudong Zhang, Zhenming Zhang, Zhenming Zhang, Zhenming Zhang, Zhenming Zhang, Jinnan Xiao, Zhenming Zhang, Zhenming Zhang, Jinnan Xiao, Fupeng Li, Shaoqi Zhou Fupeng Li, Zhenming Zhang, Fudong Zhang, Fupeng Li, Fupeng Li, Zhenming Zhang, Fudong Zhang, Shaoqi Zhou Zhenming Zhang, Fupeng Li, Zhenming Zhang, Zhenming Zhang, Shaoqi Zhou

Summary

Researchers characterized how microplastics change physically and chemically under ultraviolet irradiation aging, documenting surface cracking, yellowing, and shifts in chemical functional groups. These aging signatures are important for understanding the environmental fate and increased toxicity of weathered microplastics.

Polymers

Microplastics (MPs) coexist with biochar (BC) in soil. However, studies of the effects of BC application on MP aging in soils are few. Therefore, this study investigated the BC-mediated aging behavior of persistent microplastics (PMPs) and biodegradable microplastics (BMPs). Ultraviolet (UV) irradiation was used as the aging method, and four BC concentrations were applied to soil containing PMP-polyethylene (PE) and BMP-polybutylene adipate terephthalate (PBAT), which was analyzed to assess the effects of different BC concentrations on MP aging behavior in soil. The results revealed that the addition of BC accelerated the surface aging of PE and PBAT. Changes in carbonyl index (CI) and hydroxyl index (HI) indicated that high BC concentrations promoted UV-irradiation aging of PE and PBAT. Overall, 2 and 4% BC play a positive role in the formation of -OH groups in PE and PBAT. PE was susceptible to electrophilic attack, whereas PBAT underwent both electrophilic and nucleophilic attack.

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