紫外线吸收剂在中国农业土壤中的分布特征和来源
Zhenzhen Yao1, Bingru Li1, Li Xu1
1Institute of Quality Standard and Testing Technology, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China.
Environmental pollution (Barking, Essex : 1987)
|October 4, 2024
概括
紫外线吸收剂 (UVAs) 在设施农业土壤中比田地土壤更为普遍,特别是那些被生物降解膜覆盖的土壤. 这表明紫外线污染对土壤和生态健康存在潜在风险.
科学领域:
- 环境化学环境化学
- 土壤科学 土壤科学
- 生态毒理学 生态毒理学
背景情况:
- 紫外线吸收剂 (UVAs) 的环境污染是全球日益关注的问题,原因是它们的持久性,生物积累和生态毒性.
- 关于农业土壤中紫外线含量和分布的数据有限,特别是在受保护的种植环境中.
研究的目的:
- 调查中国农业设施和田地土壤中16种紫外线的含量和分布.
- 为了比较与不同膜类型 (可生物降解与聚乙烯) 相关的UVA水平.
- 评估农业土壤中紫外线辐射产生的潜在生态风险.
主要方法:
- 调查了来自中国27个省份的61个设施和61个田间土壤样本中的16个UVA.
- 使用分析化学技术量化总UVA含量 (Σ16UVAs).
- 与农业实践相关联的UVA水平,特别是皮使用.
主要成果:
- 与田地土壤 (平均9.66 ng/g) 相比,设施农业土壤的总紫外线含量显著更高 (平均64.2 ng/g).
- 用生物降解膜 (PBAT) 覆盖的土壤显示出比用聚乙烯 (PE) 膜覆盖的土壤更高的UVA度.
- 设施土壤中的紫外线水平与使用覆盖膜密切相关.
结论:
- 使用覆盖膜,特别是生物降解类型的覆盖膜,对农业土壤的紫外线污染作出了重大贡献.
- 越来越多地依赖可生物降解膜可能会加剧紫外线污染,对土壤和生态健康构成威胁.
- 为了制定有效的控制策略,进一步研究和监测农业土壤中的紫外线含量至关重要.
相关概念视频
Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview
2.5K
Ultraviolet–visible (UV–visible or UV–Vis) spectroscopy is an analytical technique that investigates the interaction between matter and UV–Vis light within the electromagnetic spectrum. This method is widely used for its versatility, simplicity, and relatively quick data acquisition, making it valuable for both qualitative and quantitative analysis. When UV–Vis radiation passes through a material, molecules absorb light depending on the energy required for...
2.5K
UV–Vis Spectrometers
1.3K
The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell.
1.3K
UV–Vis Spectrum
1.1K
When light passes through a substance, a portion of the light is absorbed while the remaining light is reflected or transmitted. If the molecule absorbs light between the wavelengths of 180–400 nm range, the UV spectrum is obtained, and if it absorbs light in the 400–780 nm wavelength range, the visible spectrum is obtained.
The UV–Vis spectrum of a molecule is the plot of its absorbance versus wavelength. The plot is drawn by taking molar...
The UV–Vis spectrum of a molecule is the plot of its absorbance versus wavelength. The plot is drawn by taking molar...
1.1K


