时间表Pb评估历史的微塑料动态和老化效应在城市地区与单独的下水道系统和多用途水库的城市地区
Fabiano T Conceição1, Alexandre M Fernandes1, Sarah G Lacerda1
1Universidade Estadual Paulista (UNESP), Instituto de Geociências e Ciências Exatas, Rio Claro, São Paulo, Brazil.
Journal of hazardous materials
|July 3, 2025
概括
这项研究跟踪了数十年来在城市河流沉积物中微塑料 (MP) 沉积的情况,使用Pb约会. 污水处理减少了一些国会议员,但轮胎磨损颗粒增加,突出显示了持续的城市污染挑战.
科学领域:
- 环境科学 环境科学
- 地质化学 地质化学
- 污染研究 污染研究
背景情况:
- 微塑料 (MP) 污染在城市水生环境中越来越令人担忧.
- 了解历史MP沉积模式对于有效的缓解策略至关重要.
- 具有独立下水道系统和水库的城市地区对MP管理提出了独特的挑战.
研究的目的:
- 重建了微塑料在河床沉积物和多用途水库中的历史沉积情况.
- 评估城市发展和废水处理对微塑料污染动态的影响.
- 用微塑料分析评估污染控制干预措施的有效性.
主要方法:
- 使用210Pb时间表来确定沉积物沉积率和时间分辨率.
- 在沉积物中分析了微塑料类型 (纤维,薄膜,碎片,颗粒,轮胎磨损颗粒).
- 计算的污染负载指数用于分类沉积物污染水平.
主要成果:
- 在2006年之前,未经处理的污水和雨水是MP的主要来源.
- 废水处理厂 (WWTP) 在2006年后减少了纤维,薄膜,碎片和颗粒.
- 由于车辆流量增加,轮胎磨损颗粒显著增加,达到约85,000个单位/公斤.
- 总MP在水库中减少,从约43,000到约6300单位/公斤.
- 几乎所有的沉积物核都显示出极高的污染水平.
结论:
- 时间表Pb有效地揭示了城市水生系统的历史MP沉积和污染趋势.
- 污水处理可以减轻某些类型的MP,但轮胎磨损颗粒仍然是一个重大挑战.
- 城市发展和车辆使用直接影响微塑料污染的动态.
- 综合污染管理策略对于应对复杂的城市PM污染至关重要.
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