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聚乙烯纳米塑料对污水中的有机物质微凝形成的影响

Carlos I Vazquez¹, Hsiao-Ming Chang¹, Gwo-Ching Gong²

¹Quantitative and Systems Biology, School of Natural Sciences, University of California at Merced, Merced 95343, CA, USA.

The Science of the total environment

|September 16, 2024

概括

市政废水释放纳米塑料 (NP) 和溶解废物有机物 (dEfOM). NP加速dEfOM微凝的形成,影响环境命运和微生物相互作用.

科学领域:

环境科学环境科学
环境化学环境化学
聚合物科学聚合物科学

背景情况:

废水处理厂 (WWTP) 释放纳米塑料 (NP) 和溶解废水有机物 (dEfOM).
虽然NP和dEfOM的相互作用研究不足,但对于了解环境运输至关重要.
之前的研究重点是自然有机物对NP的影响,而不是废水衍生的有机物.

研究的目的:

研究NP如何影响dEfOM聚合行为和表面颗粒度.
确定NP和dEfOM之间的聚合机制.
通过调整盐度来模拟WWTP-海洋连续条件.

主要方法:

研究了dEfOM与55nm聚烯NP的自组装.
调整水样盐度以模仿环境条件.
分析了聚合物形成速度,数量,大小和表面颗粒度.

主要成果:

dEfOM与NP自组装成微凝,特别是在高盐度 (34 psu) 的情况下.
NP显著加快了dEfOM聚合物的形成速度和数量 (300%的增加).
NP降低了聚合物表面的颗粒度,可能会影响定居和微生物殖民.

结论:

在废水排放后,NP会影响水中环境中的dEfOM组合和特性.
聚合机制涉及双价离子交联和疏水相互作用.
结果为研究NP微生物相互作用,去除技术和环境运输提供了信息.

关键词:

溶解的废水是有机物质.细粒度细粒度是一个细粒度.在微凝中使用微凝.纳米塑料是一种纳米塑料.在WWTP下排放的废水.

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