加速风化对微塑料稳定剂添加剂的液动力学的影响
James H Bridson1, Robert Abbel2, Dawn A Smith2
1Scion, Titokorangi Drive, Private Bag 3020, Rotorua 3046, New Zealand; School of Physical and Chemical Sciences, University of Canterbury, Christchurch 8041, New Zealand.
Journal of hazardous materials
|August 18, 2023
概括
对微塑料添加剂的气候影响是复杂的. 添加剂的释放有很大差异,气候变化并不总是增加泄漏,这挑战了环境风险评估的简单假设.
科学领域:
- 环境科学 环境科学
- 聚合物化学 聚合物化学
- 生态毒理学 生态毒理学
背景情况:
- 微塑料添加剂可能会伤害水生生物.
- 气候对微塑料添加物漏的影响尚未完全理解.
- 泄漏动力学和机制需要进一步研究.
研究的目的:
- 研究气候对微塑料添加剂的浸出动力学的影响.
- 评估不同类型的聚合物和气候对添加剂释放的影响.
- 了解气候引起的漏变化背后的机制.
主要方法:
- 准备九种独特的聚合物添加剂配方.
- 应用加快的气候变化和浸出程序.
- 对累积添加剂释放 (Ce) 和物理化学性质的分析.
主要成果:
- 累计添加剂释放量 (Ce) 在0.009至1162μg/g之间.
- 漂水通常随着聚合物类型的增加而增加:聚乙烯四甲酸<聚胺6<聚乙烯.
- 天气不一致地改变了浸出动力学;在九种配方中,只有三种配方发生了显著的变化.
- 添加式开花被确定为影响浸出对气候变化的反应的关键机制.
结论:
- 微塑料的添加物浸高度依赖于聚合物类型,添加物化学和气候变化的程度.
- 假设气候变化普遍增加了微塑料添加剂漏,这是一个过度简单化的假设.
- 这些发现对微塑料风险评估和缓解策略有重大影响.
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