LitChemPlast:在塑料中测量的化学物质的开放数据库
Helene Wiesinger1,2, Anna Shalin1,3, Xinmei Huang1,4
1Chair of Ecological Systems Design, Institute of Environmental Engineering, ETH Zürich, 8093 Zürich, Switzerland.
Environmental science & technology letters
|November 18, 2024
概括
这项研究揭示了塑料中超过3500种化学物质,影响健康和安全的循环经济. 对许多塑料类型和回收材料的数据有限,阻碍了进步.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 毒理学 毒理学 毒理学
背景情况:
- 塑料含有大量的化学物质,可能对人类和生态系统健康产生影响.
- 由于缺乏关于化学成分的公共信息,塑料向循环经济的过渡受到阻碍.
- 当前的知识在很大程度上依赖于专门的分析研究.
研究的目的:
- 审查和编制现有的塑料化学品测量研究.
- 为塑料中检测到的物质创建一个全面的数据库 (LitChemPlast).
- 确定各种塑料类型和生命周期阶段中化学物质存在的知识差距.
主要方法:
- 对塑料中的化学物质发表的测量研究进行系统审查.
- 来自372项研究的数据汇编,确定了3500多种独特物质.
- 检测频率和分析工作流程的分析 (有针对性与非有针对性).
主要成果:
- 在所有塑料生命周期阶段确定了超过3500种化学物质.
- 非目标分析工作流程检测到大约75%的已识别物质.
- 主要研究的物质包括金属化物,制阻燃剂和正体甲酸盐.
- 缺乏研究的产品类别包括包装,建筑和汽车塑料.
- 回收塑料显示出更高的检测率和受监管的制阻燃剂度.
结论:
- 石化塑料数据库为暴露评估和物质流量分析提供了宝贵的资源.
- 对于许多塑料类型,特别是回收材料,存在重大知识差距.
- 为了实现安全的循环塑料经济,由于涉及的化学品数量众多,额外的措施至关重要.
更多相关视频
09:04Identifying Per- and Polyfluorinated Chemical Species with a Combined Targeted and Non-Targeted-Screening High-Resolution Mass Spectrometry Workflow
Published on: April 18, 2019
12.4K
10:22Designed for Molecular Recycling: A Lignin-Derived Semi-aromatic Biobased Polymer
Published on: November 30, 2020
3.4K
相关概念视频
02:35Free-Radical Chain Reaction and Polymerization of Alkenes
7.7K
The conversion of alkenes to macromolecules called polymers is a reaction of high commercial importance. The structure of the polymer is defined by a repeating unit, while the terminal groups are considered insignificant. The average degree of polymerization represents the number of repeating units in the polymer molecule and is denoted by the subscript n.
7.7K
00:53Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)
1.9K
Acyclic diene metathesis polymerization or ADMET polymerization involves cross-metathesis of terminal dienes, such as 1,8-nonadiene, to give linear unsaturated polymer and ethylene. As ADMET is a reversible process, the formed ethylene gas must be removed from the reaction mixture to complete the polymerization process.
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...
1.9K