由于电凝处理而导致的微塑料的命运和转变:聚合物类型和形状的影响
Kala Senathirajah1, Raji Kandaiah1, Logeshwaran Panneerselvan1
1Environmental and Plastic Innovation Cluster (EPIC), Global Innovative Centre for Advanced Nanomaterials (GICAN), Faculty of Engineering and Built Environment, The University of Newcastle, Callaghan, NSW, 2308, Australia.
Environmental pollution (Barking, Essex : 1987)
|July 13, 2023
概括
电凝能有效地从废水中去除微塑料,特别是纤维. 然而,这个过程改变了聚合物结构,可能会产生更小的纳米塑料副产品.
科学领域:
- 环境科学 环境科学
- 水处理技术水处理技术
- 聚合物化学 聚合物化学
背景情况:
- 微塑料污染对环境和健康构成重大风险.
- 有效和成本效益的减排策略对于减轻微塑料污染至关重要.
- 电凝是一种有前途的氧化过程,用于去除污染物.
研究的目的:
- 评估电凝疗法在去除微塑料方面的有效性.
- 研究聚合物类型和形状对去除效率的影响.
- 分析通过电凝在微塑料中产生的物理和化学变化.
主要方法:
- 使用了一台定制的电凝反应堆.
- 对各种微塑料聚合物 (聚胺,聚乙烯,聚乙烯二甲,聚烯) 和形状 (纤维,碎片) 的去除效率进行了计算.
- 废水矩阵包括合成废水和洗衣废水.
主要成果:
- 电凝疗法证明有效地减少了微塑料,去除了92%的纤维和88%的碎片.
- 聚合物去除的顺序是:PET > LDPE > PP > PA.
- 观察到物理变化 (脱皮,表面变化) 和化学变化 (改变的键能,ROS形成).
结论:
- 电凝是一种有效的技术,用于减少废水中的微塑料.
- 该过程在微塑料中诱导物理和化学修饰.
- 降解和碎片化成纳米塑料的可能性需要进一步调查.
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