从垃圾填埋场的塑料废弃物中动态形成微塑料的漂水带压区
Yuyang Long1, Dongyan Jin1, Jing Hou1
1Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, Zhejiang Engineering Research Center of Non-ferrous Metal Waste Recycling, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310012, China.
Journal of environmental management
|November 30, 2025
概括
垃圾填埋条件会从塑料废物中产生微塑料 (MP),如PBAT/PLA等可生物降解塑料,每升产生数百万个MP. 温度驱动MP形成,而压力抑制它,为污染控制提供了洞察力.
科学领域:
- 环境科学 环境科学
- 聚合物科学 聚合物科学
- 废物管理 废物管理
背景情况:
- 垃圾填埋场的浸区是微塑料 (MP) 的重要来源和沉积点.
- 在垃圾填埋条件下,国会议员的形成过程和机制尚不清楚.
研究的目的:
- 在模拟的垃圾填埋条件下,研究从塑料废物中产生的微塑料 (MP) 的动态.
- 阐明垃圾填埋场压力环境中MP生成的机制.
主要方法:
- 用模拟的垃圾填埋条件来研究不同类型塑料的MP动态.
- 分析包括MP量化,尺寸分布和表面化学变化.
- 对溶解有机碳 (DOC) 和化学氧气需求 (COD) 等泄漏物参数进行了监测.
主要成果:
- 聚乙烯 (聚乙烯) /聚乳酸 (PBAT / PLA) 产生了大量的MPs (高达1.39 × 10^6项/L),主要在100微米以下.
- 聚乙烯 (PE) 表现出最小的碎片化.
- 温度显著加快了PBAT/PLA脱聚合和改变了表面功能组,而压力通过抑制微生物活动来抑制MP释放.
- 漂水参数 (DOC/COD) 有效地预测了MP动态.
结论:
- 温度是垃圾填埋场中MP形成的主要驱动因素,特别是在可生物降解塑料中.
- 压力通过影响微生物活动来间接抑制MP释放.
- 液参数可以作为监测垃圾填埋场MP污染的实际指标.
- 调查结果为PM污染控制和废物管理策略提供了宝贵的见解.
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