6PPD-Q驱动的稀有和丰富的种群功能分区形成了土壤生态反应
Xinwei Shi1, Weitao Liu1, Ruiying Shi1
1MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China.
Journal of hazardous materials
|November 9, 2025
概括
一种轮胎污染物N-(1,3-二甲基) -N'--p-phenylenediamine-quinone (6PPD-Q) 在土壤中缓慢降解. 罕见的微生物驱动其分解,改变土壤的碳和循环,影响酶活性.
科学领域:
- 环境化学环境化学
- 土壤微生物学 土壤微生物学
- 生态毒理学 生态毒理学
背景情况:
- N-(1,3-二甲基) -N--p-phenylenediamine-quinone (6PPD-Q) 是一种持久性,有毒的轮胎抗氧化剂转化产物.
- 其在土壤生态系统中的生态风险和退化途径尚未得到充分理解.
- 了解6PPD-Q的命运和影响对于评估轮胎污染影响至关重要.
研究的目的:
- 为了研究6PPD-Q在49天内在土壤微观世界中的降解动态.
- 评估6PPD-Q对土壤微生物群落,酶活动,代谢物和溶解有机物 (DOM) 的生态影响.
- 在6PPD-Q压力下阐明微生物适应和土壤生物地质化学重组的机制.
主要方法:
- 进行了为期49天的土壤微观宇宙实验.
- 分析了6PPD-Q降解,土壤微生物群落结构,酶活动,代谢物概况和溶解有机物 (DOM).
- 使用并发网络分析来探索代谢物-DOM相互作用.
主要成果:
- 6PPD-Q降解是时间依赖的,对转化和酶活性有延迟但显著的影响.
- 微生物群落从随机转向确定性组合;稀有种群主导污染物降解和专门的代谢功能.
- 高6PPD-Q抑制了DOM化和稳定的碳池形成,表明代谢重编程和改变了土壤碳循环.
结论:
- 一种涉及罕见种类和代谢物-DOM相互作用的新机制驱动微生物适应6PPD-Q.
- 6PPD-Q显著重组了土壤的碳和循环,影响了微生物群落的组合和功能.
- 这些发现为土壤环境中轮胎衍生污染物的生态后果提供了关键的见解.
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