Effects of microplastics on 3,5-dichloroaniline adsorption, degradation, bioaccumulation and phytotoxicity in soil-chive systems.

IF 3.2 3区环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL Environmental Geochemistry and Health Pub Date : 2024-11-19 DOI:10.1007/s10653-024-02305-8

Jing Yang, Jiaohong Li, Zhenxiang Guo, Yibo Dong, Xiaomao Wu, Wanping Zhang

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Abstract

Microplastics (MPs) and pesticides are two pollutants of concern in agricultural soils. 3,5-dichloroaniline (3,5-DCA), a highly toxic metabolite of dicarboximide fungicides, commonly co-exists with MPs and poses a risk to the environment and food safety. Batch adsorption and soil incubation experiments were employed to investigate the effects of polyethylene (PE) and polylactic acid (PLA) MPs on the environmental behavior of 3,5-DCA in soil. Chive (Allium ascalonicum) was used as the experimental plant, a pot experiment was conducted to examine the effects of individual or combined exposure to MPs and 3,5-DCA on plant 3,5-DCA bioaccumulation, growth characteristics, and phytotoxicity. The results showed that PE- and PLA-MPs increased the adsorption capacity of soil to 3,5-DCA and prolonged the degradation half-life of 3,5-DCA by 6.24 and 16.07 d, respectively. Two MPs partially alleviated the negative effects of 3,5-DCA on the root length and fresh weight of chives, while PE-MPs had a positive and dose-dependent impact on the contents of photosynthetic pigment in chive leaves. Co-exposure to 3,5-DCA and MPs increased residues of 3,5-DCA in soil and chive roots but had no significant effect on 3,5-DCA residues in chive stems or leaves. Moreover, 3,5-DCA residues in PLA-MP soil were consistently higher than those in PE-MP soil. Conclusively, MPs altered the 3,5-DCA adsorption and degradation behavior in soil, as well as its bioaccumulation in chives. Co-exposure to MPs and 3,5-DCA had dose-dependent and MP-specific effects on chive plant development and phytotoxicity.

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微塑料对土壤-蜂巢系统中 3,5-二氯苯胺的吸附、降解、生物累积和植物毒性的影响。

微塑料（MPs）和杀虫剂是农业土壤中两种令人担忧的污染物。3,5-二氯苯胺（3,5-DCA）是二甲酰亚胺类杀菌剂的一种剧毒代谢物，通常与 MPs 共存，对环境和食品安全构成风险。本研究采用了批量吸附和土壤培养实验来研究聚乙烯（PE）和聚乳酸（PLA）MPs 对 3,5-DCA 在土壤中的环境行为的影响。以韭葱（Allium ascalonicum）为实验植物，进行了盆栽实验，研究单独或同时接触 MPs 和 3,5-DCA 对植物 3,5-DCA 的生物累积、生长特性和植物毒性的影响。结果表明，聚乙烯和聚乳酸-MPs 提高了土壤对 3,5-DCA 的吸附能力，并将 3,5-DCA 的降解半衰期分别延长了 6.24 天和 16.07 天。两种 MPs 部分缓解了 3,5-DCA 对韭菜根长和鲜重的负面影响，而 PE-MPs 则对韭菜叶片中光合色素的含量有积极影响，且影响程度与剂量有关。同时接触 3,5-DCA 和 MPs 会增加土壤和韭菜根中的 3,5-DCA 残留量，但对韭菜茎或叶中的 3,5-DCA 残留量没有显著影响。此外，PLA-MP 土壤中的 3,5-DCA 残留量一直高于 PE-MP 土壤中的 3,5-DCA 残留量。因此，MPs 改变了 3,5-DCA 在土壤中的吸附和降解行为，也改变了其在韭菜中的生物累积。同时接触 MPs 和 3,5-DCA 会对韭菜植物的生长发育和植物毒性产生剂量依赖性和特定 MP 的影响。

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来源期刊

Environmental Geochemistry and Health 环境科学-工程：环境

CiteScore

8.00

自引率

4.80%

发文量

279

审稿时长

4.2 months

期刊介绍： Environmental Geochemistry and Health publishes original research papers and review papers across the broad field of environmental geochemistry. Environmental geochemistry and health establishes and explains links between the natural or disturbed chemical composition of the earth’s surface and the health of plants, animals and people. Beneficial elements regulate or promote enzymatic and hormonal activity whereas other elements may be toxic. Bedrock geochemistry controls the composition of soil and hence that of water and vegetation. Environmental issues, such as pollution, arising from the extraction and use of mineral resources, are discussed. The effects of contaminants introduced into the earth’s geochemical systems are examined. Geochemical surveys of soil, water and plants show how major and trace elements are distributed geographically. Associated epidemiological studies reveal the possibility of causal links between the natural or disturbed geochemical environment and disease. Experimental research illuminates the nature or consequences of natural or disturbed geochemical processes. The journal particularly welcomes novel research linking environmental geochemistry and health issues on such topics as: heavy metals (including mercury), persistent organic pollutants (POPs), and mixed chemicals emitted through human activities, such as uncontrolled recycling of electronic-waste; waste recycling; surface-atmospheric interaction processes (natural and anthropogenic emissions, vertical transport, deposition, and physical-chemical interaction) of gases and aerosols; phytoremediation/restoration of contaminated sites; food contamination and safety; environmental effects of medicines; effects and toxicity of mixed pollutants; speciation of heavy metals/metalloids; effects of mining; disturbed geochemistry from human behavior, natural or man-made hazards; particle and nanoparticle toxicology; risk and the vulnerability of populations, etc.