不可避免的垃圾成分对垃圾填埋场微塑料释放和硫酸盐还原的影响

IF 7.1 2区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Waste management Pub Date : 2025-04-11 DOI:10.1016/j.wasman.2025.114789

Ying Hu , Xianghang Li , Dongsheng Shen , Lifang Hu , Chengran Fang , Yuyang Long

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引用次数: 0

摘要

本研究系统地研究了在不同垃圾成分条件下，模拟垃圾填埋场环境中垃圾成分、微塑料（MP）释放和硫酸盐还原过程之间的协同调节机制。主要发现包括：与低生物降解废物组相比，高生物降解废物组的微塑料释放量和硫酸盐消耗量更高；低生物降解废物组的硫酸盐浓度衰减与微塑料释放反应之间的耦合更为敏感。可生物降解废物是不可避免的 MP 释放源，占总 MP 释放量的 17.42%。值得注意的是，高生物降解废物组产生的 MP 水平是低生物降解废物组的 2.75-2.38 倍。可生物降解垃圾中丰富的有机物与硫酸盐还原过程协同作用，大大加剧了MP的二次释放。此外，渗滤液循环增强了 MP 释放与硫酸盐还原之间的动态耦合。基于这些发现，我们提出了有针对性的垃圾源分类和渗滤液监管策略，以实现对垃圾填埋场中新污染物和遗留污染物的协调控制。这种方法为污染控制和垃圾填埋场的可持续管理提供了科学支持。

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Effects of inescapable waste composition on microplastic release and sulfate reduction in landfill

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Effects of inescapable waste composition on microplastic release and sulfate reduction in landfill

This study systematically investigated the co-regulatory mechanism between waste composition, microplastic (MP) release, and sulfate reduction processes in simulated landfill environments under various waste composition conditions. Key findings include higher MP release and sulfate consumption in high-biodegradable waste groups compared to low-biodegradable waste ones, and a more sensitive coupling between sulfate concentration attenuation and MP release response in the low-biodegradable waste group. Biodegradable waste emerged as an inescapable source of MP release, contributing 17.42% of total MP release. Notably, high-biodegradable waste groups generated MP levels 2.75–2.38 times higher than their low-biodegradable counterparts. The abundant organic matter in biodegradable waste synergized with the sulfate reduction process, substantially exacerbating secondary MP release. Furthermore, leachate circulation enhanced the dynamic coupling between MP release and sulfate reduction. Based on these findings, a targeted strategy for waste source classification and leachate regulation was proposed to achieve coordinated control of new pollutants and legacy pollutants in landfills. This approach provides scientific support for pollution control and sustainable landfill management.

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来源期刊

Waste management 环境科学-工程：环境

CiteScore

15.60

自引率

6.20%

发文量

492

审稿时长

39 days

期刊介绍： Waste Management is devoted to the presentation and discussion of information on solid wastes,it covers the entire lifecycle of solid. wastes. Scope: Addresses solid wastes in both industrialized and economically developing countries Covers various types of solid wastes, including: Municipal (e.g., residential, institutional, commercial, light industrial) Agricultural Special (e.g., C and D, healthcare, household hazardous wastes, sewage sludge)