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兰改性托尼特对沉积物中去除过程和潜在的微生物机制的温度依赖性影响
Penglong Wang1, Jiehua Wang1, Pingping Zhang1
1College of Geographical Sciences, Faculty of Geographical Science and Engineering, Henan University, Zhengzhou 450046, China; Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions, Ministry of Education, Henan University, Kaifeng 475004, China.
在湖泊中应用兰改性土矿 (LMB) 显示了对去除的温度依赖性影响. 在低温下,LMB增强了脱和anammox,但在高温下抑制了它们,这表明战略性的季节性应用对于有效的环氧化湖泊整治.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 临界技术 临界技术
背景情况:
- 兰改性土矿 (LMB) 用于控制 eutrophic 湖中的.
- 它对沉积物中去除的影响,特别是脱和anammox的影响,尚不清楚.
- 了解这些影响对于有效的湖泊恢复策略至关重要.
研究的目的:
- 研究LMB对沉积物脱和anammox的影响.
- 探索影响这些过程的潜在微生物机制和环境因素.
- 确定溶解氧 (DO) 和温度 (T) 对LMB疗效的作用.
主要方法:
- 利用同位素追踪和元基因组学研究去除途径.
- 经过实验操纵的溶解氧和温度条件.
- 员工冗余分析 (RDA) 和结构方程建模 (SEM) 用于数据分析.
主要成果:
- 在15°C时,LMB显著增强了脱和anammox的脱,但在30°C时抑制了两者.
- LMB调节了nosZ基因用于脱,并抑制了anammox基因 (hzsA,hzsB,hdh).
- 物理化学因素如pH,水分,EC,TC,TN,NO3−-N和NH4+-N影响了功能基因的丰度.
结论:
- LMB对去除的影响高度依赖温度,主要由nosZ基因调节.
- 物理化学因素和温度之间的协同相互作用决定了LMB的有效性.
- 建议在低温季节对LMB进行战略性应用,以最大限度地提高 eutrophic湖中的去除效益.
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