使用凝固剂辅助剂增强自然水中的微塑料去除
Chaoran Li1, Rosa Busquets2, Luiza C Campos3
1Jiangsu Key Laboratory of Ocean-Land Environmental Change and Ecological Construction, School of Marine Science and Engineering, Nanjing Normal University, Nanjing 210023, China; Centre for Urban Sustainability and Resilience, Department of Civil, Environmental and Geomatic Engineering, University College London, Gower St, London, WC1E 6BT, United Kingdom.
Chemosphere
|August 22, 2024
概括
聚化 (PAC) 和聚烯胺 (PAM) 有效地从水中去除超过95%的微塑料. 最佳条件提高了清除,但较小和较轻的微塑料仍然对当前的水处理方法构成挑战.
科学领域:
- 环境科学 环境科学
- 水处理工程水处理工程
- 聚合物科学 聚合物科学
背景情况:
- 微塑料 (MP) 污染是一个日益严重的环境问题,需要有效的净水策略.
- 传统的水处理方法需要优化微塑料的去除.
研究的目的:
- 评估凝固,花和沉积的有效性,以从水中去除各种类型的微珠.
- 确定最佳处理条件和影响微塑料去除效率的关键因素.
主要方法:
- 研究了聚化 (PAC) 和聚烯胺 (PAM) 作为凝固剂和花剂的性能.
- 优化的参数包括凝固剂剂量,剂剂量,pH值,速度和沉时间.
- 在天然水样本中测试了不同类型,大小和密度的微塑料的去除效率.
主要成果:
- 聚化 (PAC) 证明了与花的优异微塑料聚合,在最佳条件下达到95%以上的去除 (PAC 0.4 mmol/L,PAM 3 mg/L,pH 8,特定和沉时间).
- 聚烯胺 (PAM) 显著增强了各种凝固剂和微珠类型的微塑料去除,在度≥3 mg/L时达到峰值效率.
- 清除效率取决于尺寸,较大的微珠 (>250微米) 清除效率更高 (95%) 比较小的微珠 (<250微米,清除49%). 密度较高的微塑料比较轻的塑料更加有效地沉积.
结论:
- 凝固,花和沉积,特别是PAC和PAM,提供了一种高效的方法,可以从水中去除大量的微塑料.
- 处理效率受到微塑料大小和密度的影响,较小和较轻的颗粒构成更大的挑战.
- 需要进一步研究先进技术,以解决更小,更不密集的微塑料的去除问题.
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