在各种脱水处理下,污泥中的微塑料的命运,特征和潜在威胁
Jialin Liang1, Yu Zhang1, Jiaqi Zhang1
1College of Resources and Environment, Guangdong Provincial Key Laboratory Lingnan Specialty Food Science and Technology, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China.
Journal of environmental management
|May 10, 2025
概括
这项研究比较了污泥脱水方法,发现基于铁的先进氧化工艺 (Fe-AOPs) 在减少微塑料 (MPs) 和改善脱水能力方面优越. 对于低重金属污泥,Fe2+ + PMS + CaO方法是理想的,而FeCl3 + CaO适合高重金属污泥.
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:
- 在废水污泥中越来越多地检测到微塑料 (MP),造成环境风险.
- 污泥排水过程可以改变MP的特性及其与污染物的相互作用.
- 了解处理过程中的MP行为对于有效的污泥管理至关重要.
研究的目的:
- 为了比较四种污泥脱水方法,以提高其提高脱水能力的有效性.
- 调查这些治疗期间国会议员的命运和特征.
- 评估处理的MPs对重金属吸附的影响.
主要方法:
- 评估了四种污泥脱水过程:FeCl3 + CaO,Fe2+ + H2O2 + CaO,Fe2+ + PMS + CaO,以及Fe2+ + CaO2 + CaO.
- 分析了泥的脱水能力,MP度和MP表面特征.
- 量化了重金属对处理的MP的吸附.
主要成果:
- 基于铁的先进氧化工艺 (Fe-AOPs) 显著提高了污泥的脱水能力,降低了含水量低于54.0% (w/t).
- Fe2+ + PMS + CaO和FeCl3 + CaO处理有效降低了污泥和过物中的MP度.
- 与FeCl3 + CaO相比,在Fe2+ + PMS + CaO治疗时,重金属对MPs的吸附率更高.
结论:
- Fe2+ + PMS + CaO是污泥脱水和MP去除的可行选择,特别是对于含重金属含量低的污泥.
- FeCl3 + CaO有效地减轻重金属和MPs的共毒性,使其适用于含重金属度高的污泥.
- 该研究提供了根据MP污染和重金属含量选择适当的污泥处理方法的见解.
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