酸盐修正案改善了垃圾填埋场生物覆盖土壤中甲氧化的稳定性
Hengyang Chen1, Zhaoceng Wu1, Xue Tong1
1School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310012, China.
Environmental research
|December 6, 2025
概括
修正可以在垃圾填埋场生物覆盖土壤 (MS,BS) 中恢复甲氧化活性,但不能恢复常规土壤 (RS). 谨慎的环境管理是维持微生物稳定的关键,以持续减少甲排放.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 地质化学 地质化学
背景情况:
- 垃圾填埋场覆盖土壤在减轻甲 (CH4) 排放方面发挥着至关重要的作用.
- 这些土壤中的甲氧化活性往往会随着时间的推移而下降,因此需要采取稳定策略.
- 生物覆盖材料为传统覆盖土壤提供了潜在的替代品.
研究的目的:
- 研究改在不同填埋场覆盖土壤类型中稳定甲氧化活性方面的有效性.
- 为了比较生物覆盖材料 (堆肥混合物 - MS,废土 - BS) 与传统垃圾填埋场覆盖土壤 (RS) 的性能.
- 分析对微生物群落结构和稳定性对甲氧化的影响.
主要方法:
- 在不同条件下对MS,BS和RS的甲氧化率进行比较分析.
- 外源酸- (NO3- -N) 的应用,以评估CH4氧化活性的恢复.
- 在修改后的土壤中测量的保留和损失.
- 微生物共发生网络分析,以评估社区结构和稳定性.
主要成果:
- 与传统土壤 (RS) 相比,生物覆盖材料 (BS 和 MS) 的平均CH4氧化率 (292.3-308.3 μg g-1 h-1) 显著更高.
- 补充 (800 mg kg-1 NO3- -N) 有效地恢复了BS和MS的CH4氧化活性,但不是RS.
- 虽然BS和MS的损失最小,但它们的微生物群落表现出较弱的生物群稳定性,尽管正相关性更高.
结论:
- 改是一种可行的策略,可以增强和稳定特定生物覆盖材料中的甲氧化.
- 传统的垃圾填埋场覆盖土壤 (RS) 可能需要不同的管理方法,因为营养状况不佳和微生物丰富.
- 优化环境变量对于保持微生物群体的稳定性和确保生物覆盖土壤在减少垃圾填埋场甲排放方面的长期有效性至关重要.
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