CQC, Department of Chemistry, University of Coimbra, Coimbra, Portugal.
Bull Environ Contam Toxicol. 2021 Jul;107(1):131-139. doi: 10.1007/s00128-021-03228-1. Epub 2021 Apr 13.
The large-scale use of pesticides is one of the main causes of the dramatic degradation of our environment. Pesticides such as imidacloprid (IMID) have been linked to declines in bee health and toxicity to other beneficial insects. They pose a threat to human health due to their persistence in the environment and accumulation in the food chain. Therefore, it is essential to test possible environmentally-friendly solutions for their elimination. The present study evaluates the efficiency of microalgae Nannochloropsis sp. for the removal of IMID from synthetic wastewater. The influence of aeration, light, and the presence of UV radiation on the degradation of IMID were factors considered in the study. A rapid RP-HPLC method was developed and validated for the analysis and quantification of IMID in the context of bioremediation with microalgae. Nannochloropsis sp. removed 4.39 µg mL from an initial content of 9.59 µg mL (reaching approximately 50%) of IMID in the first 20 h. This study demonstrated that the removal of IMID by the marine microalgae Nannochloropsis sp. is both effective and light-dependent.
大规模使用农药是导致环境急剧恶化的主要原因之一。像吡虫啉（IMID）这样的农药已被证明与蜜蜂健康状况下降和对其他有益昆虫的毒性有关。由于它们在环境中的持久性和在食物链中的积累，它们对人类健康构成了威胁。因此，测试可能的环保解决方案以消除它们是至关重要的。本研究评估了微藻 Nannochloropsis sp. 去除合成废水中 IMID 的效率。在这项研究中，考虑了曝气、光照和 UV 辐射的存在对 IMID 降解的影响。开发并验证了一种快速反相高效液相色谱法，用于分析和定量微藻生物修复过程中的 IMID。Nannochloropsis sp. 在最初的 9.59 µg mL 含量下，在 20 小时内从 4.39 µg mL 中去除了 IMID（达到了大约 50%）。本研究表明，海洋微藻 Nannochloropsis sp. 对 IMID 的去除既有效又依赖于光照。
