从海洋环境中部署的经过气候变化的塑料中洗和转化化学添加剂
James H Bridson1, Hayden Masterton2, Beatrix Theobald3
1Scion, Titokorangi Drive, Private Bag 3020, Rotorua 3046, New Zealand; School of Physical and Chemical Sciences, University of Canterbury, Christchurch 8041, New Zealand.
Marine pollution bulletin
|November 25, 2023
概括
天气显著改变塑料添加剂,特别是聚乙烯,影响海洋污染风险. 这项研究揭示了环境暴露如何改变塑料化学配置文件.
科学领域:
- 环境科学 环境科学
- 海洋生物学 海洋生物学
- 材料科学 材料科学 材料科学
背景情况:
- 塑料污染对环境构成重大风险,其中化学添加剂是一个主要问题.
- 塑料添加剂在海洋生态系统中的行为和命运仍然不太清楚.
- 了解增材漏对于评估塑料污染影响至关重要.
研究的目的:
- 研究气候对普通塑料中可提取的化学添加剂的影响.
- 分析海上部署的时间和位置如何影响添加剂配置文件.
- 为了比较不同类型的塑料对气候变化的影响.
主要方法:
- 海洋部署实验在新西兰的奥特罗亚进行了9个月.
- 暴露了四种塑料类型:聚乙烯,氧降解聚乙烯,聚胺6和聚乙烯二甲.
- 液体染色学-质谱学 (LC-MS) 用于添加剂的向和非向分析.
主要成果:
- 人工气候严重影响了聚乙烯和氧降解聚乙烯中的添加剂度.
- 部署地点和时间对这些塑料中的添加剂变化的影响较小.
- 聚胺6和聚乙烯四甲酸显示出最小的变化,表明相对惰性到气候.
结论:
- 气候变化显著改变了某些塑料的化学成分,影响了潜在的环境风险.
- 在评估海洋污染时,必须考虑塑料添加剂的浸和气候变化.
- 未来的风险评估应考虑到塑料在环境中的老化状态.
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