用于冷却碳酸饮料的塑料瓶作为微塑料和纳米塑料的来源
Yalin Chen1, Haiyin Xu2, Yuanling Luo3
1College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China; College of Environmental Science and Engineering, Hunan University, Changsha 410082, China.
Water research
|June 24, 2023
概括
塑料瓶将微塑料 (MP) 和纳米塑料 (NP) 释放到碳酸饮料中,聚烯是其中一个重要来源. 像二氧化碳压力和冷解周期这样的条件会增加释放,但预处理可以减少MP/NP.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 食品科学 食品科学 食品科学
背景情况:
- 碳酸饮料在可能促进污染物释放的条件下 (低温,高压,酸度) 储存在塑料瓶中.
- 微塑料 (MP) 和纳米塑料 (NP) 从这些瓶子释放到饮料中的释放模式尚不清楚.
研究的目的:
- 调查影响塑料瓶从塑料瓶中释放到碳酸饮料中的MP/NP和重金属的因素.
- 在各种条件下量化MP/NP释放,包括塑料类型,二氧化碳量,温度,糖含量和添加剂.
主要方法:
- 从聚烯,聚乙烯和聚乙烯四甲酸盐瓶中释放的MP/NP的比较分析.
- 在不同的二氧化碳填充量,冷解周期以及糖或添加剂的存在下,评估MP/NP释放量.
- 在实验设置中的MP/NP度与实际碳酸饮料的比较.
主要成果:
- 聚烯瓶释放的MP和NP比其他塑料类型多得多.
- 增加的二氧化碳填充量和冷解周期大大增加了MP/NP释放量.
- 涉及重复通货膨胀的预处理使MP/NP释放量减少了90%以上.
- 实际碳酸饮料的MP度高于实验控制条件.
结论:
- 塑料瓶,特别是聚烯,对碳酸饮料中的MP/NP构成一个不可忽视的风险.
- 诸如材料选择,高压预处理和避免冷解周期等策略可以减轻MP/NP摄入.
- 研究结果提供了有关在具有相似物理条件的自然环境中释放污染物的见解.
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