Influence of nutrient conditions on the transport of bacteria in saturated porous media

Han, Peng; Shen, Xiufang; Yang, Haiyan; Kim, Hyung-Seok; Tong, Meiping

doi:10.1016/j.colsurfb.2012.08.053

Cited by 39 publications

(20 citation statements)

References 43 publications

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“…The influent of the filtration experiments was freshly prepared before each batch of experiment by adding an aliquot of the E. coli stock solution into sterilized deionized (DI) water to provide an E. coli concentration of ∼1.5 × 10 5 CFU/mL, which was within the typical concentration range in contaminated water and was consistent with previous studies. 9,25−28 DI water was selected because (1) the natural surface water usually has low ionic strength values (e.g., 10 −2 to 10 mM); 4,5 (2) our previous findings suggested that a suspension of E. coli cells in reduced ionic strength conditions over a relatively short period of time would not alter their viability and cell properties such as size; 29,30 and (3) since low ionic strength generally leads to minimal cell attachment, 31,32 the use of DI water would minimize the potential removal of E. coli cells through adsorption and thus would allow for a better investigation of their removal via the physical process of straining. Concentrations of E. coli in stock solution, as well as in the influent and effluent during filtration experiments, were determined via the plate counting method using mTEC agar plates, according to USEPA Method 1103.1.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

Development of Effective and Fast-Flow Ceramic Porous Media for Point-of-Use Water Treatment: Effect of Pore Size Distribution

Yang

Min

et al. 2020

ACS Sustainable Chem. Eng.

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Ceramic filters are widely used for sustainable point-of-use water treatment in developing countries. It has remained a great challenge, however, for ceramic filters to simultaneously achieve high flow rate and effective bacterial removal. In this work, we reported the use of recycled paper fiber (greenfiber) as combustible material for the development of effective and fast-flow ceramic filters and compared their performance to filters that were fabricated using starch and rice husk, two common combustible materials used in previous studies. The clean ceramic filters made using 15% greenfiber achieved >4 log removal of bacteria (>99.99% removal) and an equivalent flow rate of 5.9 L/h (37.5 L/m2-h); the filters made using 20% greenfiber exhibited a fast flow rate of 13.9 L/h (87.1 L/m2-h) while maintaining a log microbial removal efficiency of >2 (>99% removal of bacterial cells). The two flow rates were ∼100% and >300% higher than the flow rates of mainline ceramic filters currently in use. The filters were characterized using mercury intrusion porosimetry, scanning electron microscopy, X-ray fluorescence analysis, and Fourier transform infrared spectroscopy. Our results suggested that the pore size distribution pattern played critical roles in the microbial removal efficiency. A mathematical framework was developed to provide a semiquantitative analysis of the relationship between filter bacterial removal efficiency and pore size distribution.

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Section: ■ Materials and Methodsmentioning

confidence: 99%

Development of Effective and Fast-Flow Ceramic Porous Media for Point-of-Use Water Treatment: Effect of Pore Size Distribution

Yang

Min

et al. 2020

ACS Sustainable Chem. Eng.

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“…This can be explained by two approaches: The first is the consequence of the "salting-out effect" whereby the solubility of proteins decreased with salt concentration [30,35,36]. The second is the result of the hydration effect occurring when the concentration was significantly high (i.e., 1 M NaCl) [38,39]. The maximum value of removal turbidity efficiency (91.07%) was obtained for the coagulant agent extracted with a 0.5 M NaCl solution.…”

Section: Effect Of Coagulant Dosage On Turbidity Removal Efficiency Fmentioning

confidence: 99%

Use of Acorn Leaves as a Natural Coagulant in a Drinking Water Treatment Plant

Benalia

Derbal

Pánico

et al. 2018

Water

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In this study, the use of acorn leaves as a natural coagulant to reduce raw water turbidity and globally improve drinking water quality was investigated. The raw water was collected from a drinking water treatment plant located in Mila (Algeria) with an initial turbidity of 13.0 ± 0.1 NTU. To obtain acorn leaf powder as a coagulant, the acorn leaves were previously cleaned, washed with tap water, dried, ground and then finely sieved. To improve the coagulant activity and, consequently, the turbidity removal efficiency, the fine powder was also preliminarily treated with different solvents, as follows, in order to extract the coagulant agent: (i) distilled water; (ii) solutions of NaCl (0.25; 0.5 and 1 M); (iii) solutions of NaOH (0.025; 0.05 and 0.1 M); and (iv) solutions of HCl (0.025; 0.05 and 0.1 M). Standard Jar Test assays were conducted to evaluate the performance of the coagulant in the different considered operational conditions. Results of the study indicated that at low turbidity (e.g., 13.0 ± 0.1 NTU), the raw acorn leaf powder and those treated with distilled water (DW) were able to decrease the turbidity to 3.69 ± 0.06 and 1.97 ± 0.03 NTU, respectively. The use of sodium chloride solution (AC-NaCl) at 0.5 M resulted in a high turbidity removal efficiency (91.07%) compared to solutions with different concentrations (0.25 and 1 M). Concerning solutions of sodium hydroxide (AC-NaOH) and hydrogen chloride (AC-HCl), the lowest final turbidities of 1.83 ± 0.13 and 0.92 ± 0.02 NTU were obtained when the concentrations of the solutions were set at 0.05 and 0.1 M, respectively. Finally, in this study, other water quality parameters, such as total alkalinity hardness, pH, electrical conductivity and organic matters content, were measured to assess the coagulant performance on drinking water treatment.

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“…Deposition of bacterial cells in geomedia appears to be affected by (1) microbial properties including surface charge [6], hydrophobicity [7, 8], bacterial size and shape [9], growth phase [10], motility [11], nutrition condition [12], chemotaxis [13], metabolic activity [14], and composition of the cell surface (e.g., lipopolysaccharide, extracellular polymeric substances, outer membrane proteins, flagella and fimbriae) [15–19], (2) soil properties including soil particles size and surface properties [17, 20], mineral content [21], moisture content [7] and organic matter or nutrients content [22, 23], (3) environmental factors including ionic strength and ion valence [24, 25], pH [26] and temperature [27]. In addition, hydraulic conditions such as flow velocity [28, 29], input microbial concentration [30] and heterogeneity of microbial populations [6] also play a role.…”

Section: Introductionmentioning

confidence: 99%

Effect of low-concentration rhamnolipid on transport of Pseudomonas aeruginosa ATCC 9027 in an ideal porous medium with hydrophilic or hydrophobic surfaces

Zhong

Liu

Jiang

et al. 2016

Colloids and Surfaces B: Biointerfaces

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The success of effective bioaugmentation processes for remediation of soil and groundwater contamination requires effective transport of the injected microorganisms in the subsurface environment. In this study, the effect of low concentrations of monorhamnolipid biosurfactant solutions on transport of Pseudomonas aeruginosa in an ideal porous medium (glass beads) with hydrophilic or hydrophobic surfaces was investigated by conducting miscible-displacement experiments. Transport behavior was examined for both glucose-grown and hexadecane-grown cells, with low or high surface hydrophobicity, respectively. A clean-bed colloid deposition model was used for determination of deposition rate coefficients. Results show that cells with high surface hydrophobicity exhibit greater retention than cells with low surface hydrophobicity. Rhamnolipid affects cell transport primarily by changing cell surface hydrophobicity, with an additional minor effect by increasing solution ionic strength. There is a good linear relation between k rhamnolipid-regulated cell surface hydrophobicity presented as bacterial-adhesion-to-hydrocarbon (BATH) rate of cells (R2 = 0.71). The results of this study show the importance of hydrophobic interaction for transport of bacterial cells in silica-based porous media, and the potential of using low-concentration rhamnolipid solutions for facilitating bacterial transport in bioaugmentation efforts.

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Influence of nutrient conditions on the transport of bacteria in saturated porous media

Cited by 39 publications

References 43 publications

Development of Effective and Fast-Flow Ceramic Porous Media for Point-of-Use Water Treatment: Effect of Pore Size Distribution

Development of Effective and Fast-Flow Ceramic Porous Media for Point-of-Use Water Treatment: Effect of Pore Size Distribution

Use of Acorn Leaves as a Natural Coagulant in a Drinking Water Treatment Plant

Effect of low-concentration rhamnolipid on transport of Pseudomonas aeruginosa ATCC 9027 in an ideal porous medium with hydrophilic or hydrophobic surfaces

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