微塑料对含藻类的表面水处理的综合影响:凝结-超联合工艺:藻类的培养,凝结性能和膜污染的发展
Dachao Lin1, Zhongjian Zhuang1, Nan Yu1
1School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, PR China.
The Science of the total environment
|March 8, 2024
概括
含有藻类的表面水中的微塑料 (MP) 刺激藻类生长,但改善凝固. 在水处理过程中,MPs可以减少较小的膜上的污染,但在较大的膜上会使其恶化.
科学领域:
- 环境科学 环境科学
- 水处理工程水处理工程
- 材料科学 材料科学 材料科学
背景情况:
- 沿海地表水面临着由缩引起的藻类繁殖和微塑料 (MP) 污染造成的双重威胁.
- 凝固-超是一种关键的水处理工艺,但MPs对藻类载重地表水 (ASW) 处理的影响尚未完全理解.
- 了解自然环境和水处理中的MP行为对于有效的水净化至关重要.
研究的目的:
- 系统地调查MPs对藻类培养,凝固性能和ASW处理中的膜污染的影响.
- 阐明MPs在联合凝固-超系统中影响水净化效率的机制.
主要方法:
- 藻类培养实验以评估MP对生长和代谢物分泌的影响.
- 凝固试验测量颗粒大小分布和泽塔潜力.
- 扫描电子显微镜 (SEM) 用于分析50 kDa和300 kDa膜上的膜污染层.
主要成果:
- MPs刺激了58%的藻类活动,并抑制了关键有机代谢物的分泌.
- 国会议员充当了核,促进了更大的凝血流 (82.6微米到107.6微米),并增强了污染物去除.
- 国会议员减轻了50kDa膜上的污染,但加剧了蛋糕层的形成和降低了300kDa膜的透性.
结论:
- 在ASW处理中,MPs显著改变藻类的行为和凝血动态.
- MPs对膜污染的影响取决于膜孔的大小,对较小的孔隙有好处,对较大的孔隙有不利影响.
- 在凝血-超过程中必须考虑MP的存在,以有效处理ASW和净化水.
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