微塑料对城市生活垃圾有机组分降解产甲烷的影响

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摘要通过实验室反应器模拟实验分析了不同化学组分(聚乙烯和聚丙烯)和浓度(20,40,80个/g聚乙烯)的微塑料暴露水平对填埋场生活垃圾有机组分降解产甲烷(CH₄)的影响.结果表明:微塑料暴露会显著(P<0.01)影响降解过程中总有机碳含量,其变化范围为-18.03%~22.65%;微塑料暴露会显著(P<0.01)促进降解过程水解酸化阶段乙酸的积累,平均增加了19.09%;微塑料暴露显著(P<0.01)抑制CH₄的产生和积累,累积产量减少21.38%~46.56%;不同化学组分的微塑料暴露均显著(P<0.01)影响CH₄的产量,聚乙烯微塑料浓度对CH₄的产量无显著影响.

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	倪仁杰
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	郑子豪
	孙安逸
	宋立岩

关键词 ：微塑料, 生活垃圾填埋场, 甲烷, 影响

Abstract：The effects of microplastic exposure levels of different chemical components (polyethylene and polypropylene) and concentrations (20, 40, 80/g polyethylene) on the methane (CH₄) production through organic fractions of solid waste decomposition were investigated in batch series of simulated bioreactors. Results show that microplastic exposure significantly (P<0.01) affected the total organic carbon content in the degradation process, which varied from -18.03% to 22.65%; microplastics exposure significantly (P<0.01) promoted the accumulation of acetic acid in the hydrolysis and acidification stage of the degradation process, with an average increase of 19.09%; microplastic exposure significantly (P<0.01) inhibited the production and accumulation of CH₄, and the cumulative yield decreased by 21.38% to 46.56%; the exposure of different chemical components of microplastics significantly (P<0.01) affected the CH₄ production, and the concentration of polyethylene microplastics had no significant effect on the CH₄ production.

Key words： microplastics domestic waste landfill methane influence

收稿日期: 2024-03-05

PACS:

X705

基金资助:国家自然科学基金资助项目(51878642)

通讯作者: 宋立岩,教授,20023@ahu.edu.cn E-mail: 20023@ahu.edu.cn

作者简介: 倪仁杰(1999-),男,安徽六安人,安徽大学硕士研究生,主要从事污染控制与修复研究.x21301057@stu.ahu.edu.cn.

引用本文:

倪仁杰, 洪文清, 郑子豪, 孙安逸, 宋立岩. 微塑料对城市生活垃圾有机组分降解产甲烷的影响[J]. 中国环境科学, 2024, 44(10): 5687-5695. NI Ren-jie, HONG Wen-qing, ZHENG Zi-hao, SUN An-yi, SONG Li-yan. Solid waste disposal, risk and management —Effect of microplastics on methane production from organic components of municipal solid waste (MSW). CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(10): 5687-5695.

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