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Interactions of traditional and biodegradable microplastics with neonicotinoid pesticides

文献类型： 外文期刊

作者： Wang, Kang 1 ; Li, Cheng 3 ; Li, Haifeng 3 ; Liu, Qi 4 ; Khan, Kifayatullah 5 ; Li, Fang 3 ; Chen, Wei 1 ; Xu, Li 3 ;

作者机构： 1.China Univ Geosci, Sch Environm Studies, Wuhan 430078, Peoples R China

2.China Univ Geosci, MOE Key Lab Groundwater Qual & Hlth, Wuhan 430078, Peoples R China

3.Beijing Acad Agr & Forestry Sci, Inst Qual Stand & Testing Technol, Beijing 100095, Peoples R China

4.Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Key Lab Prevent & Control Residual Pollut Agr Film, Minist Agr & Rural Affairs, Beijing 100081, Peoples R China

5.Univ Swat, Dept Environm & Conservat Sci, Swat 19120, Pakistan

关键词： Microplastic; Neonicotinoid pesticide; Adsorption-desorption mechanism; Aging; Bioavailability

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：8.2； 五年影响因子：8.6 ）

ISSN： 0048-9697

年卷期： 2024 年 947 卷

页码：

收录情况： SCI

摘要： Neonicotinoid pesticides (NNPs) and microplastics (MPs) are two emerging contaminants in agricultural environment. However, the interaction between MPs (especially biodegradable plastics) and NNPs is currently unclear. Therefore, taking thiacloprid (THI) as an example of NNPs, this study explores the adsorption-desorption process and mechanism of NNPs on MPs (traditional and biodegradable plastics), and analyzed the main factors affecting the adsorption (pH, salinity and dissolved organic matter). In addition, by using diffusive gradients in thin-films device, this study assessed the impact of MPs on the bioavailability of NNPs in soil. The results showed that the maximum adsorption capacity of polyamide 6 (96.49 mu g g-1) for THI was greater than that of poly (butylene adipate co-terephthalate) (88.78 mu g g-1). Aging increased the adsorption amount of THI (5.53 %-15.8 %) due to the higher specific surface area and reduced contact angle of MPs, but the adsorption mechanism remained unchanged. The desorption amount of THI from MPs in simulated intestinal fluid is 1.30-1.36 times. The MPs in soil alter the distribution of THI in the soil, increasing the bioavailability of THI while inhibiting its degradation. The results highlighted the significance of examining the combined pollution caused by MPs and NNPs.

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