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探索聚钢的气候变化行为:从表面特征到微型 (纳米) 塑料和添加剂的释放

Nina Yang¹, Cong Men², Yanyan Zhang¹

¹State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China.

Journal of environmental management

|July 26, 2024

概括

塑料气候变化释放出微塑料和纳米塑料,随着年龄的增长,释放率会增加. 这项研究追踪了聚钢 (PS) 的降解,揭示了产品释放的模式,这对于环境危害评估至关重要.

科学领域:

环境科学环境科学
聚合物科学聚合物科学
材料科学材料科学材料科学

背景情况:

在自然环境中塑料气候变化是复杂的,释放有害的微塑料,纳米塑料和添加剂.
了解这些排放对于评估塑料环境风险至关重要.

研究的目的:

系统地研究聚钢 (PS) 在紫外线照射和机械动下的气候变化过程.
分析微塑料,纳米塑料和添加剂随时间推移的释放模式.
为了确定塑料老化和产品释放之间的相关性.

主要方法:

聚乙烯 (PS) 样品经过紫外线照射和机械动,持续时间各不相同 (1-20天).
监测了物理和化学变化 (衰老,黄色,脆性,碳基).
释放的微塑料和纳米塑料用激光红外和拉曼光谱分析了尺寸分布.
检测和量化释放的添加剂和可溶性产品.

主要成果:

随着气候变化的持续时间,PS老化指标 (黄色,脆性,碳基) 增加.
表面的气候变化从氧化发展到裂和脱皮.
产品释放与塑料老化程度以及释放的产品之间有积极的相关性.
微塑料尺寸 (10-20微米) 仍然占主导地位,而纳米塑料尺寸则下降.
20天后检测到20种不同的化学物质,包括添加剂,释放量取决于老化时间,类型和数量.

结论:

塑料气候变化加速了微塑料,纳米塑料和添加剂的释放.
该研究澄清了产品发布模式及其随时间的相互关系.
这些发现有助于预测和评估由塑料气候变化引起的环境污染.

关键词:

微 (或纳米) 塑料.塑料添加剂塑料添加剂塑料的气候变化塑料的气候变化聚乙烯是一种聚乙烯.

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