E. coli phage transport in porous media: Response to colloid types and water saturation,Science of the Total Environment

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E. coli phage transport in porous media: Response to colloid types and water saturation
Science of the Total Environment ( IF 8.2 ) Pub Date : 2023-10-06 , DOI: 10.1016/j.scitotenv.2023.167635
Wenjing Zhang ₁ , Shuxin Li ₁ , Kaichao Zhao ₁ , Juanfen Chai ₁ , Bo Wan ₁ , Yunqi Qin ₂ , Huan Huan ₃ , Simiao Sun ₄ , Yuesuo Yang ₁ , Muhammad Yousuf Jat Baloch ₁

Affiliation

Because of its long survival time, high migration ability and high pathogenicity, the migration of the virus in the subsurface environment deserves in-depth exploration and research. In this study we investigated the migration behavior of phage (VI) with organic colloids (HA) or inorganic colloids (SiO) in the saturated or unsaturated bands and compared the differences in their migration mechanisms.The effects of different colloids on the surface characteristics of VI were analyzed according to particle size and zeta potential. Column experiments were conducted to simulate their migration in the subsurface environment. The results show that HA enhances the stability of VI-HA, promotes VI migration and plays a dominant role in its migration process under both saturated and unsaturated conditions. In contrast, SiO puts VI-SiO in an unstable state and is easily separated in the unsaturated state, thus promoting VI migration. Based on migration experiments, the extent of influence factors on VI migration was quantified and compared. The effect of colloids on VI migration is greater than that of moisture content, where the effect of HA is greater than that of SiO. This study provides an experimental research idea to determine the dominant factors affecting virus migration, and provides a general direction and theoretical basis for the biological risk assessment of pathogenic microorganisms in complex underground environments, in order to enable the decision makers to make a response in time, accurately, and efficiently.

中文翻译：

多孔介质中的大肠杆菌噬菌体运输：对胶体类型和水饱和度的响应

由于其存活时间长、迁移能力强、致病力强，病毒在地下环境中的迁移值得深入探索和研究。本研究研究了噬菌体（VI）与有机胶体（HA）或无机胶体（SiO）在饱和或不饱和带的迁移行为，并比较了它们迁移机制的差异。不同胶体对噬菌体表面特性的影响VI根据粒径和zeta电位进行分析。进行柱实验来模拟它们在地下环境中的迁移。结果表明，HA增强了VI-HA的稳定性，促进VI迁移，并在饱和和非饱和条件下的迁移过程中起主导作用。相反，SiO使VI-SiO处于不稳定状态，并且很容易在不饱和状态下分离，从而促进VI迁移。基于迁移实验，量化并比较了影响VI迁移的因素的程度。胶体对VI迁移的影响大于水分含量，其中HA的影响大于SiO。本研究为确定影响病毒迁移的主导因素提供了实验研究思路，为复杂地下环境下病原微生物的生物风险评估提供了总体方向和理论依据，以便决策者能够及时做出应对、准确、高效。

更新日期：2023-10-06

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