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通过可生物降解复合碳源在地污染土壤中的过度酸盐的强化生物修复

Zhongchen Yang¹, Yanhong Lou¹, Hong Pan¹

¹National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, 61 Daizong Road, Tai'an 271018, China.

|July 14, 2023

概括

添加可生物降解的复合碳来源有助于酸盐在被酸盐污染的土壤中的生物修复. 较低剂量 (5g/kg) 有效地去除酸盐,同时最大限度地减少温室气体排放和环境影响.

科学领域:

环境科学环境科学
土壤科学土壤科学
微生物学微生物学

背景情况:

过度的土壤酸盐 (NO3-) 有助于二次盐化.
阿特拉津污染阻碍了有效的酸盐生物修复.
可生物降解复合碳来源提供了一个潜在的解决方案.

研究的目的:

研究可生物降解复合碳源不同剂量对酸盐污染土壤中酸盐生物修复的影响.
评估碳源应用对酸盐去除效率,温室气体排放和微生物群落结构的影响.

主要方法:

在不同度 (5g/kg和25g/kg) 的可生物降解复合碳源应用于被酸盐污染的土壤.
测量酸盐 (NO3-) 的去除速度.
量化温室气体排放 (N2O,CO2) 和计算全球变暖潜力 (GWP).
分析土壤微生物群落的结构和功能,重点关注代谢和阿特拉降解.

主要成果:

25g/kg的剂量实现了最佳的酸盐去除 (92.10%),略高于5g/kg (86.15%).
更高的剂量 (25g/kg) 导致N2O和CO2排放量显著增加,以及更高的GWP.
复合碳来源的应用减少了微生物的丰富性和多样性,但增强了代谢和素降解 (p < 0.05).

结论:

复合碳源的5g/kg剂量有效平衡了酸盐生物修复性能,减少了对环境的不利影响.
优化碳源剂量对于污染土壤的可持续生物修复至关重要.
该研究强调了定制生物修复策略的潜力,用于管理土壤污染物和营养污染.

关键词:

亚特拉辛 (Atrazine) 是一种可生物降解的聚合物聚合物生物修复生物修复复合碳来源的复合碳来源微生物社区结构的微生物社区结构.酸盐酸盐的使用方法

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