传统和可生物降解的微塑料通过不同的化学微生物途径影响了土中的移动性和甲基化
Hai-Qian Li1, Jin-Peng Lv2, Yue-Hui Jia1
1Key Laboratory for Northern Urban Agriculture of Ministry of Agriculture and Rural Affairs, Beijing University of Agriculture, Beijing 102206, PR China.
Journal of hazardous materials
|November 18, 2024
概括
在田土壤中的微塑料 (MP) 影响 (As) 动态. 传统的MP减少了孔水As,但增加了甲基化As,而可生物降解的MP增加了两者,影响了土壤As循环.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 环境化学环境化学
背景情况:
- 微塑料 (MP) 污染在农业土壤中越来越令人担忧.
- 国会议员对 (As) 在土中的行为的影响在很大程度上是未知的.
研究的目的:
- 研究传统微塑料 (CMP) 和可生物降解微塑料 (BMP) 对土壤中动态的影响.
- 阐明驱动MP污染下的As转换和流动性的机制.
主要方法:
- 一个98天的微观宇宙实验,使用As污染的土.
- 治疗组包括5%剂量的CMP和BMP.
- 分析涉及测量As度,甲基化水平和微生物群体组成,使用网络和随机森林分析.
主要成果:
- CMPs降低了25-38%的孔水As,并增加了土壤%MeAs的8-23倍.
- BMPs增加了孔水酸盐的2-9倍和土壤%MeAs的11-395倍.
- CMPs通过微生物的As (III) 氧化抑制了As的流动性;BMPs通过微生物的铁减少促进了As的释放.
结论:
- MPs显著改变了在田土壤中循环的As,根据MP类型产生不同的影响.
- CMPs和BMPs通过不同的微生物途径影响As甲基化.
- 结果提供了对生态系统中As和MP污染的综合见解.
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