当前位置： SCI文献检索 > INTERNATIONAL JOURNAL OF HYGIENE AND ENVIRONMENTAL HEALTH期刊下所有文献 > Transport and removal of viruses in saturated sand columns under oxic and anoxic conditions--Potential implications for groundwater protection.

Transport and removal of viruses in saturated sand columns under oxic and anoxic conditions--Potential implications for groundwater protection.

Abstract：

:To protect groundwater as a drinking water resource from microbiological contamination, protection zones are installed. While travelling through these zones, concentrations of potential pathogens should decline to levels that pose no risks to human health. Removal of viruses during subsurface passage is influenced by physicochemical conditions, such as oxygen concentration, which also affects virus survival. The aim of our study was to evaluate the effect of redox conditions on the removal of viruses during sand filtration. Experiments in glass columns filled with medium-grained sand were conducted to investigate virus removal in the presence and absence of dissolved oxygen. Bacteriophages MS2 and PhiX174, as surrogates for human enteric viruses were spiked in pulsed or in continuous mode and pumped through the columns at a filter velocity of about 1m/d. Virus breakthrough curves were analyzed by calculating total viral elimination and fitted using one-dimensional transport models (CXTFIT and HYDRUS-1D). While short-term experiments with pulsed virus application showed only small differences with regard to virus removal under oxic and anoxic conditions, a long-term experiment with continuous dosing revealed a clearly lower elimination of viruses under anoxic conditions. These findings suggest that less inactivation and less adsorption of viruses in anoxic environments affect their removal. Therefore, in risk assessment studies aimed to secure drinking water resources from viral contamination and optimization of protection zones, the oxic and anoxic conditions in the subsurface should also be considered.

journal_name

Int J Hyg Environ Health

journal_title

International journal of hygiene and environmental health

authors

Frohnert A,Apelt S,Klitzke S,Chorus I,Szewzyk R,Selinka HC

doi

10.1016/j.ijheh.2014.06.004

subject

Has Abstract

pub_date

2014-11-01 00:00:00

pages

861-70

issue

8

eissn

1438-4639

issn

1618-131X

pii

S1438-4639(14)00048-0

journal_volume

217

pub_type

杂志文章

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