DOI: 10.1016/j.watres.2018.06.070
Scopus记录号: 2-s2.0-85049462242
论文题名: Different electrically charged proteins result in diverse bacterial transport behaviors in porous media
作者: Wu D. ; He L. ; Ge Z. ; Tong M. ; Kim H.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 143 起始页码: 425
结束页码: 435
语种: 英语
英文关键词: Bacteria transport
; Patch-charged interaction
; Proteins
; Site competition
; Steric interaction
Scopus关键词: Adsorption
; Bacteria
; Body fluids
; Cell membranes
; Contrast media
; Deposition
; Ionic strength
; Mammals
; Porous materials
; Proteins
; Quartz
; Sodium chloride
; Bacteria transport
; Bovine serum albumins
; Cell surface charges
; Experimental conditions
; Natural aquatic systems
; Patch-charged interaction
; Positively charged proteins
; Steric interactions
; Sand
; bovine serum albumin
; calcium chloride
; silicon dioxide
; trypsin
; adsorption
; bacterium
; calcium
; competition (ecology)
; electric field
; experimental study
; porous medium
; protein
; quartz
; sodium chloride
; transport process
; adsorption
; Article
; bacterial growth
; bacterial phenomena and functions
; bacterial transport
; bacterium adherence
; cell surface
; cell suspension
; cell transport
; colloid
; Escherichia coli
; ionic strength
; macromolecule
; nonhuman
; pH
; porosity
; priority journal
; sand
; surface charge
; surface property
; zeta potential
; Bacteria (microorganisms)
; Bovinae
英文摘要: The influence of proteins on bacterial transport and deposition behaviors in quartz sand was examined in both NaCl (10 and 25 mM) and CaCl2 solutions (1.2 and 5 mM). Bovine Serum Albumin (BSA) and bovine trypsin were used to represent negatively and positively charged proteins in natural aquatic systems, respectively. The presence of negatively charged BSA in suspensions increased the transport and decreased bacterial deposition in quartz sand, regardless of the ionic strength and ion types. Whereas, positively charged trypsin inhibited the transport and enhanced bacterial deposition under all experimental conditions. The potential mechanisms controlling the changes of bacterial transport behaviors varied for different charged proteins. The steric repulsion resulting from BSA adsorption onto both bacteria and quartz sand was found to play a dominant role in the transport and deposition of bacteria in porous media with BSA copresent in suspension. BSA adsorption onto bacterial surfaces and competition for deposition sites onto sand surfaces (adsorption of quartz sand surfaces) contributed to the increased cell transport with BSA in suspension. In contrast, the attractive patch-charged interaction induced by the adsorption of trypsin onto both bacteria and quartz sand had great contribution to the decreased bacterial transport in porous media with trypsin copresent in suspension. The increase in bacteria size, and the adsorption of trypsin onto cell surfaces (resulting in less negative cell surface charge) and quartz sand surfaces (providing extra deposition sites) were found to be the main contributors to the decreased transport and increased deposition of bacteria in quartz sand with trypsin in suspension. © 2018 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112556
Appears in Collections: 气候减缓与适应
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作者单位: The Key Laboratory of Water and Sediment Sciences, Ministry of Education, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China; Department of Mineral Resources and Energy Engineering, Chonbuk National University, Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do, 54896, South Korea
Recommended Citation:
Wu D.,He L.,Ge Z.,et al. Different electrically charged proteins result in diverse bacterial transport behaviors in porous media[J]. Water Research,2018-01-01,143