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| Effects of particle size and pore water velocity on transport of Escherichia coli in saturated porous media |
| Received:September 07, 2015 |
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| KeyWord:Escherichia coli;pore water velocity;particle size;saturated porous media;transport |
| Author Name | Affiliation | E-mail | | YAO Shun-yi | College of Environment, Sichuan Agricultural University, Chengdu 611130, China
MoE Key Lab for Eco-restoration of Regional Contaminated Environment, Shenyang University, Shenyang 110044, China | | | YUAN Xue-mei | College of Environment, Sichuan Agricultural University, Chengdu 611130, China
MoE Key Lab for Eco-restoration of Regional Contaminated Environment, Shenyang University, Shenyang 110044, China | | | YANG Xin-yao | MoE Key Lab for Eco-restoration of Regional Contaminated Environment, Shenyang University, Shenyang 110044, China | yangxinyao@hotmail.com | | DENG Shi-huai | College of Environment, Sichuan Agricultural University, Chengdu 611130, China | shdeng8888@163.com |
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| Abstract: |
| The transport of pathogenic microbes in porous media is critical to groundwater quality. This study investigated the combined effects of particle size and pore water velocity on the deposition and release behavior of Escherichia coli(E. coli) in saturated quartz sands at different ionic strengths. Results showed that both particle size and pore water velocity affected the transport of E. coli in porous media. Decreasing particle size increased straining effect, deposition and thus retention rates of E. coli. Moreover, the enhanced straining effect resulted in lower releases of E. coli from the smaller particles. Reducing pore water velocity tended to increase deposition and retention rates of E. coli. At greater ionic strength, decreases in both particle size and pore water velocity further enhanced deposition and retention rates of E. coli. These results would improve our understanding of releases and transport of biocolloids under transient ionic strength. |
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