液微环境对垃圾填埋场中甲酸 Ester 的发生的影响
Yifan Zhang1, Yiman Gao2, Beidou Xi1
1College of Water Sciences, Beijing Normal University, Beijing, 100875, China; State Key Laboratory of Environmental Criteria and Risk Assessment, and State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
Chemosphere
|September 27, 2023
概括
垃圾填埋场中的微环境变化影响了甲酸 (PAE) 的发生. 漂水性质和微生物群落影响PAE水平,其中di-n-butyl甲酸盐是最丰富的.
科学领域:
- 环境科学 环境科学
- 环境化学环境化学
- 微生物学 微生物学
背景情况:
- 甲酸 (PAE) 是消费品中广泛使用的增塑剂.
- 在垃圾填埋场中老化的塑料废物导致PAE释放到环境中.
- 垃圾填埋场微环境变化对PAE发生的影响尚不清楚.
研究的目的:
- 调查垃圾填埋场液的特性,微生物群落结构,溶解有机物 (DOM) 和PAE发生之间的关系.
- 阐明驱动PAE对垃圾填埋稳定期间微环境变化反应的机制.
主要方法:
- 从各种稳定阶段的垃圾填埋场液的分析.
- 液的物理和化学特性 (例如,Cl-, NH4+,金属).
- 评估细菌群体结构和DOM化学成分.
- 对六种优先控制的PAE进行量化.
主要成果:
- 液含有高的Cl-和NH4+;金属度通常随着填埋年龄的增长而下降.
- 蛋白质细菌,细菌菌群和细菌菌群主导细菌群落 (68.63%的丰度).
- 富含红素/碳酸盐的环分子是主要的DOM成分 (56%-64%).
- 最丰富的PAE (1046μg L-1) 是di-n-butyl甲酸盐;但甲酸盐没有被检测到.
- 液pH值,Chloroflexi丰度和SUVA254值显著影响了PAE的发生.
结论:
- 垃圾填埋场的微环境因素,如pH值,特定的微生物类型和DOM特征,直接影响PAE的发生和命运.
- 这些因素的影响因PAE类型和分子量而异.
- 丁乙烯甲酸盐 (DBP) 和丁乙烯甲酸盐 (DEHP) 对水生生态系统构成重大风险.
- 这些发现为了解污染物演变和垃圾填埋场控制提供了科学基础.
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