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| 典型纳米农药制剂的缓释特性及其水生生物毒性效应 |
| Controlled-Release Characteristics of Typical Nanopesticide Formulations and their Bio-effects on microalgae |
| 投稿时间：2024-03-20 修订日期：2024-04-07 |
| DOI： |
| 中文关键词: 纳米农药，结晶紫，控释，小球藻，纳米二氧化钛，纳米二氧化硅，生态风险 |
| 英文关键词: Nanopesticides, Crystal Violet, Controlled Release, Microalgae, Nano-TiO2, Nano-SiO2, Ecological Risk. |
| 基金项目:典型环境持久性自由基对水生生物的毒性效应及其毒性作用机理研究 |
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| 中文摘要: |
| 近年来新型农药制剂—纳米农药正在开发并逐渐推向市场进行应用。目前行业内主要关注的是纳米农药的制备或其应用功效，然而关于其环境行为以及对环境和人类健康的危害等方面的问题还需要更加深入的研究。本研究制备了具有缓释特性的纳米农药制剂（CV@nTiO2和CV@nSiO2），以除菌剂结晶紫（CV）作为农药类的代表示例，考察了不同浓度的纳米农药制剂的缓释特性，以及其对水生生物小球藻的生化指标的影响。结果发现，本研究制备的纳米农药制剂CV@nTiO2和CV@nSiO2具有pH和温度响应释放特性，能显著减缓CV的释放速度，延长CV的释放时间。在相同浓度的情况下，相对于CV@nTiO2来说，CV@nSiO2对小球藻的细胞密度和叶绿素合成的抑制作用更弱一些。本研究结果为纳米农药制剂中纳米载体材料的选择提供了相应的研究基础和实验依据，同时纳米农药制剂的缓释特性也为其低剂量和长时效的应用奠定了强有力的基础。 |
| 英文摘要: |
| In recent years, novel agrochemical formulations, specifically nanopesticides, are under development and gradually being introduced to the application. Now, the main focus is being on its synthesis and application efficacy, while their environmental behavior, impact on non-target organisms and potential risks to environmental and human health was not paid enough attention. This study has developed nanopesticide formulations (CV@nTiO2 and CV@nSiO2), using the germicide Crystal Violet (CV) as a representative pesticide, to investigate their controlled-release performance and their bio-effects on the aquatic organism Chlorella. We found our synthesized nanopesticide formulations CV@nTiO2 and CV@nSiO2 possess pH- and temperature-responsive release characteristics to postpone the release rate of CV and prolonged its release duration. In our study, CV@nSiO2 exhibited higher cumulative release dose than CV@nTiO2, further exerted lower inhibitory effect on the cell density and chlorophyll synthesis of Chlorella. Our research provided scientific basis for the nanocarrier selection and experimental evidence, while the controlled-release performance of the nano-formed agro-chemicals gave the basic foundation for their prospective application. |
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