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补充剂是否会在被石油碳化合物污染的土壤中增强生物降解活性?

Aimée D Schryer¹, Steven D Siciliano¹

¹Department of Soil Science, College of Agriculture and Bioresources, University of Saskatchewan, Saskatoon, Saskatchewan, Canada.

Journal of environmental quality

|July 12, 2024

概括

添加 (P) 修正可以重新启动停滞的土壤石油碳化合物 (PHC) 生物修复. 然而,在寒冷的石灰质土壤中,P生物可用性可能并不总是限制因素.

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:

(P) 肥料通过平衡碳与的比率来增强土壤石油-碳化合物 (PHC) 生物修复.
在某些土壤条件下,生物修复可能会停滞,因不明原因阻碍微生物活动.

研究的目的:

调查有限的P生物可用性是否导致冷,石灰质土壤中停滞的PHC生物修复.
为了确定是否添加特定的P修正可以重新启动微生物活动并提高降解率.

主要方法:

从加拿大萨斯喀彻温省的四个PHC受影响的地点收集和描述了土壤.
使用通用线性混合模型来识别与低降解率相关的因素.
进行了实验室实验,用各种P修改剂对停滞土壤进行注,以测试降解效率.

主要成果:

中性pH值,高磁性和高盐度值与较低的PHC降解率有关.
与停滞的土壤相比,在活跃的土壤中二烯降解速度更快.
三聚酸盐修正案在一个停滞的土壤中加速了烯降解,但结果在不同的土壤中不同,其中一个土壤显示了没有修正案的最大降解.

结论:

土壤P生物可用性可能不是唯一限制微生物活动的因素,在停滞的PHC生物修复中.
需要采用包括矿物学和微生物学在内的综合方法,以改善PHC在寒冷的石灰质土壤中的生物降解.

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相关概念视频

Bioremediation

Bioremediation

Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.

The Phosphorus Cycle

The Phosphorus Cycle

Unlike carbon, water, and nitrogen, phosphorus is not present in the atmosphere as a gas. Instead, most phosphorus in the ecosystem exists as compounds, such as phosphate ions (PO43-), found in soil, water, sediment and rocks. Phosphorus is often a limiting nutrient (i.e., in short supply). Consequently, phosphorus is added to most agricultural fertilizers, which can cause environmental problems related to runoff in aquatic ecosystems.