Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016WR019832 |
Effect of low-concentration rhamnolipid biosurfactant on Pseudomonas aeruginosa transport in natural porous media | |
Liu, Guansheng1,2; Zhong, Hua1,2,3,4; Jiang, Yongbing5; Brusseau, Mark L.4; Huang, Jiesheng1,2; Shi, Liangsheng1,2; Liu, Zhifeng3; Liu, Yang3; Zeng, Guangming3 | |
2017 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2017 |
卷号 | 53期号:1 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | Enhanced transport of microbes in subsurface is a focus in bioaugmentation applications for remediation of groundwater. In this study, the effect of low-concentration monorhamnolipid biosurfactant on transport of Pseudomonas aeruginosa ATCC 9027 in natural porous media (silica sand and a sandy soil) with or without hexadecane as the nonaqueous phase liquids (NAPLs) was studied with miscible-displacement experiments using artificial groundwater as the background solution. Transport of two types of cells was investigated, glucose-grown and hexadecane-grown cells with lower and higher cell surface hydrophobicity (CSH), respectively. A clean-bed colloid deposition model was used to calculate deposition rate coefficients (k) for quantitative assessment on the effect of the rhamnolipid on the transport. In the absence of NAPLs, significant cell retention was observed in the sand (81% and 82% for glucose-grown and hexadecane-grown cells, respectively). Addition of low-concentration rhamnolipid enhanced cell transport, with 40 mg/L of rhamnolipid reducing retention to 50% and 60% for glucose-grown and hexadecane-grown cells, respectively. The k values for both glucose-grown and hexadecane-grown cells correlated linearly with rhamnolipid-dependent CSH quantitatively measured using a bacterial-adhesion-to-hydrocarbon method. Retention of cells by the soil was nearly complete (>99%). Forty milligrams per liter of rhamnolipid reduced the retention to 95%. The presence of NAPLs in the sand enhanced the retention of hexadecane-grown cells with higher CSH. Transport of cells in the presence of NAPLs was enhanced by rhamnolipid at all concentrations tested, and the relative enhancement was greater than in the absence of NAPLs. This study shows the importance of hydrophobic interaction on bacterial transport in natural porous media and the potential of using low-concentration rhamnolipid for facilitating cell transport in subsurface for bioaugmentation efforts. |
英文关键词 | rhamnolipid NAPLs cell surface hydrophobicity retention bacterial transport |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000394911200022 |
WOS关键词 | CRYPTOSPORIDIUM-PARVUM OOCYSTS ; CELL-SURFACE HYDROPHOBICITY ; BACTERIAL TRANSPORT ; ESCHERICHIA-COLI ; QUARTZ SAND ; HUMIC-ACID ; NONIONIC SURFACTANTS ; IONIC-STRENGTH ; SOIL ; BIODEGRADATION |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/20425 |
专题 | 资源环境科学 |
作者单位 | 1.Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan, Peoples R China; 2.Wuhan Univ, Sch Water Resources & Hydropower Engn, Wuhan, Peoples R China; 3.Hunan Univ, Coll Environm Sci & Engn, Changsha, Hunan, Peoples R China; 4.Univ Arizona, Dept Soil Water & Environm Sci, Tucson, AZ USA; 5.Sericultural Res Inst Hunan Prov, Changsha, Hunan, Peoples R China |
推荐引用方式 GB/T 7714 | Liu, Guansheng,Zhong, Hua,Jiang, Yongbing,et al. Effect of low-concentration rhamnolipid biosurfactant on Pseudomonas aeruginosa transport in natural porous media[J]. WATER RESOURCES RESEARCH,2017,53(1). |
APA | Liu, Guansheng.,Zhong, Hua.,Jiang, Yongbing.,Brusseau, Mark L..,Huang, Jiesheng.,...&Zeng, Guangming.(2017).Effect of low-concentration rhamnolipid biosurfactant on Pseudomonas aeruginosa transport in natural porous media.WATER RESOURCES RESEARCH,53(1). |
MLA | Liu, Guansheng,et al."Effect of low-concentration rhamnolipid biosurfactant on Pseudomonas aeruginosa transport in natural porous media".WATER RESOURCES RESEARCH 53.1(2017). |
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