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The Effect of Critical pH on Virus Fate and Transport in Saturated Porous Medium

机译：临界pH值对饱和多孔介质中病毒命运和转运的影响

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Several viral transport experiments were conducted in a model aquifer 1 m long, using bacteriophages MS2 and φX174 at various pH (4.6 to 8.3) conditions, to increase our understanding of virus behavior in ground water. The results indicate the existence of a critical pH at which the virus behavior changes abruptly. This is supported by data from field and batch experiments. The critical pH is determined to be 0.5 unit below the highest isoelectric point of the virus and porous medium. When water pH is below the critical pH, the virus has an opposite charge to at least one component of the porous medium, and is almost completely and irreversibly removed from the water. This suggests that electrostatic attraction at a subcritical water pH condition is an important factor controlling virus attenuation in ground water. The concept of critical pH can assist in the design of geologic barriers for preventing viral contamination in ground water.
机译：在长度为1 m的模型含水层中，使用噬菌体MS2和φX174在各种pH（4.6至8.3）条件下进行了几次病毒运输实验，以增进我们对地下水中病毒行为的了解。结果表明存在临界pH，在该pH下病毒行为会突然改变。现场和批处理实验的数据对此提供了支持。临界pH被确定为比病毒和多孔介质的最高等电点低0.5个单位。当水的pH值低于临界pH值时，该病毒与多孔介质的至少一种组分具有相反的电荷，并且几乎完全不可逆地从水中去除。这表明在亚临界水pH条件下的静电吸引是控制地下水中病毒衰减的重要因素。临界pH值的概念可以帮助设计地质屏障，以防止地下水中的病毒污染。

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