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基于MgAl和MgFe的层状双氧化物对动员和沉积物中的微生物群落的对比作用

Xiaolong Wu¹, Ruzhong Li¹, Jianwei Lin²

¹School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, 230009, PR China.

|November 8, 2023

概括

基于/的分层双氧化物 (MA-LDH) 能够有效地固定优化湖中的沉积物 (P),其性能优于基于/铁的LDH (MF-LDH). MA-LDH显示出优异的P吸收和稳定的无活化,使其成为湖泊修复的理想选择.

科学领域:

环境科学环境科学
水的化学水的化学
环境修复环境修复

背景情况:

沉积物中释放的 (P) 是水生生态系统中缩的主要驱动因素.
层状双氧化物 (LDH) 在现场沉积物P修复方面得到了探索.
对不同类型的LDH进行比较研究对于P固定是至关重要的.

研究的目的:

为了比较评估/基 (MA) 和/铁基 (MF) 的LDH在现场沉积物P处理.
评估它们对P调动,P固定稳定性和微生物群体结构的影响.
为了确定最适合的LDH,以修复 eutrophic湖.

主要方法:

通过MA-LDH和MF-LDH在pH范围内的酸盐吸附的实验室实验.
在无氧和再悬浮条件下进行现场沉积物封闭/修改实验.
移动P (Mob-P) 含量和沉积物微生物群落结构的分析.

主要成果:

MA-LDH的酸盐吸附能力 (64.89 mg/g) 比MF-LDH (14.32 mg/g) 高得多.
在无氧条件下,MA-LDH和MF-LDH都有效地阻止了P向无氧条件下的水上迁移,MA-LDH显示出更高的效率.
MA-LDH在广泛的pH范围内表现出稳定的P无活化,而MF-LDH的疗效因pH而异.
微生物群落分析揭示了结构性转变,影响了P稳定机制,但没有改变整体多样性.

结论:

由于吸附能力更高和稳定的P无活化,MA-LDH在现场沉积物P修复方面优于MF-LDH.
MA-LDH封装,特别是被包裹在织物中时,是一种有前途的,环保的解决方案,用于缩湖中的内部P载荷.
LDH治疗有效地重塑微生物群落,有助于沉积物P稳定.

关键词:

形成对比的效果.有层的双氧化物.微生物社区的微生物社区.固化不动化的.沉积物沉积物是一种沉积物.

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