地下水酸碱环境对肠道病毒胶体迁移规律的影响

Effect of Acid-Base Environment on Migration Regularity of Enterovirus Colloid in Groundwater

选用污染水体中检测到的vB_EcoM-ep3大肠杆菌噬菌体作为模式病毒,通过室内动态迁移模拟实验,利用DLVO理论与胶体过滤理论分析纳米级病原微生物——病毒在地下水中的迁移过程,并考察不同地下水酸碱环境下肠道病毒胶体的迁移规律.结果表明:当地下水环境由酸性(pH=5.0)变为碱性(pH=9.0)时,病毒胶体的粒径减小,质量回收率增大,分别为12.5%,29.1%,61.8%;沉积速率系数减小,分别为4.1×10^(-4),2.8×10^(-4),1.0×10^(-4);Zeta电势降低、DLVO势垒和病毒的稳定性升高;病毒胶体沉积在岩性介质表面的能力减弱.

Escherichia coli phage vB_EcoM-ep3 detected in contaminated water was selected as a model virus,and the indoor dynamic migration simulation experiment was carried out.We analyzed the migration process of nanoscale pathogenic microorganism—virum in groundwater by using DLVO theory and colloid filtration theory,and investigated the migration regularity of enterovirus colloid under different groundwater acid-base environments.The results show that:When the groundwater environment changs from acidic condition(pH=5.0)to alkaline condition(pH=9.0),the particle sizes of virus colloid decrease and the mass recovery rates increase,which are 12.5%,29.1% and61.8%,respectively;the coefficients of deposition rate decrease,which are 4.1×10^(-4),2.8×10^(-4) and1×10^(-4),respectively;Zeta potential decreases,while DLVO barrier and the stability of the virus increase;the ability of the virus colloid to deposit on the surface of the lithology medium weakens.