现场生物炭上限对微生物动态和沉积物中氨释放的影响
Yu Zhao1, Yaoyao Zhu2, Jianyin Huang3
1State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.
Journal of environmental management
|December 7, 2024
概括
生物炭封闭通过吸附NH4+-N并改变沉积物特性,有效地减少了湖泊沉积物中氨释放的量. 这种方法还增强了参与去除的微生物群落.
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:
- 白阳地湖 (BYDL) 的沉积物污染威胁到水质.
- 从沉积物中释放的氨 (NH4+-N) 是一个关键问题.
- 生物炭 (BC) 是一种潜在的沉积物修复材料.
研究的目的:
- 调查现场生物炭 (BC) 封闭对控制沉积物中NH4+-N释放的有效性.
- 评估BC对沉积物微生物群落及其功能的影响.
主要方法:
- 在Baiyangdian湖实地进行中宇宙实验.
- 应用4厘米的BC层作为沉积物盖.
- 监测 NH4+-N 度在覆盖水和沉积物中的情况.
- 对沉积物的物理化学特性 (pH,有机物含量,C/N比率) 的分析.
- 评估微生物社区结构和功能性基因表达.
主要成果:
- 在60日之前,BC上限显著降低了上层水中的NH4+-N度,达到0.051毫克L-1.
- 从沉积物中释放的潜在NH4+-N流量从1.84降至-0.76毫克m−2d−1.1.
- BC改善了沉积物的pH值,有机物含量和C/N比率.
- BC改变了微生物群落结构,增加了蛋白质细菌和固菌细菌的数量.
- BC增强了参与NH4+-N转化和去除的关键功能基因的表达.
结论:
- 在现场BC封顶是一种有前途的技术,可以减轻污染的湖泊沉积物释放的NH4+-N.
- BC的有效性归因于增强的NH4+-N吸附和刺激微生物循环.
- BC的应用促进了有利于去除的微生物环境,改善了整体水质.
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