Water and waste water filtration. Concepts and applications

Yao, Kuan-Mu; Habibian, Mohammad T.; O’Melia, Charles R.

doi:10.1021/es60058a005

Cited by 1,521 publications

(1,251 citation statements)

References 11 publications

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“…In this study, clean-bed filtration theory was employed to interpret the steady-state effluent concentration data according to Yao et al (1971), Liu et al (1995) and Lecoanet et al (2004). Particle mobility in porous media was expressed in terms of the distance in a homogeneous porous medium that the nano-particles would have to traverse to reduce their concentration to an arbitrary fraction of that initially present (designated as L 0 ).…”

Section: Porous Media Column Studymentioning

confidence: 99%

Aqueous stability and mobility of C60 complexed by sodium dodecyl benzene sulfonate surfactant

Peng

Yuan

Wang

et al. 2016

Journal of Environmental Sciences

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Surfactant complexation may have significant effects on the environmental behavior of nano-particles. In order to understand the ecological exposure of nano-materials, it is important to determine the stability and mobility of surfactant-complexed nano-materials in aqueous systems. In this study, the aggregation and transport of C 60 complexed by the surfactant sodium dodecyl benzene sulfonate (SDBS) were investigated. It was found that SDBS-complexed C 60 had a ζ-potential of −49.5 mV under near-neutral pH conditions and remained stable during an aging period of 15 days. It had a critical coagulation concentration of 550 mmol/L for NaCl, which was higher than common natural colloids and many kinds of raw nano-materials, and was comparable to those of many kinds of surface-modified nano-materials. SDBS enhanced the stability of C 60 colloid; however, at the same time, it also enhanced the colloidal particle aggregation rate. Much higher mobility was found for SDBS-complexed C 60 than C 60 colloid. Increase in ionic strength, Ca 2+ concentration or Al 3+ concentration decreased the mobility. In general, SDBS-complexed C 60 had high stability and mobility.

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Section: Porous Media Column Studymentioning

confidence: 99%

Aqueous stability and mobility of C60 complexed by sodium dodecyl benzene sulfonate surfactant

Peng

Yuan

Wang

et al. 2016

Journal of Environmental Sciences

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“…In order to investigate hydrodynamic effects on clogging, Mays and Hunt (13) analyzed published data sets from constant-flow filtration experiments that measured particle accumulation and head loss over a range of fluid velocities. Data were analyzed using a one-parameter clogging model based on the work of O'Melia and Ali (14), who predicted clogging based on the surface area within the porous media, which increases with particle deposition: (1) where ΔH is the head loss, ΔH o is the clean bed head loss, σ is the specific deposit, defined as the dimensionless ratio of deposit volume to total filter volume, and γ is an empirical clogging parameter that quantifies clogging per specific deposit. Because of the difficulty in measuring specific area (15), this model requires an empirical approach.…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamic and Chemical Factors in Clogging by Montmorillonite in Porous Media

Mays

2007

Environ. Sci. Technol.

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Clogging by colloid deposits is important in water treatment filters, groundwater aquifers, and petroleum reservoirs. The complexity of colloid deposition and deposit morphology preclude models based on first principles, so this study extends an empirical approach to quantify clogging using a simple, one-parameter model. Experiments were conducted with destabilized suspensions of sodiumand calcium-montmorillonite to quantify the hydrodynamic and chemical factors important in clogging. Greater clogging is observed at slower fluid velocity, consistent with previous investigations. However, calcium-montmorillonite causes one order of magnitude less clogging per mass of deposited particles compared to sodium-montmorillonite or a previously published summary of clogging in model granular media. Steady state conditions, in which the permeability and the quantity of deposited material are both constant, were not observed, even though the experimental conditions were optimized for that purpose. These results indicate that hydrodynamic aspects of clogging by these natural materials are consistent with those of simplified model systems, and they demonstrate significant chemical effects on clogging for fully destabilized montmorillonite clay.

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“…Equilibrium sorption was used to characterize the weak attachment of viruses, which are probably deposited in shallow energy minima of the virus -solid surface interaction energy profile. The kinetic attachment rate coefficient was related to the colloid filtration parameters of collision efficiency and single collector efficiency (Yao et al, 1971;Rajagopalan and Tien, 1976). The kinetic release rate coefficient was usually much smaller than the attachment rate coefficient.…”

Section: Introductionmentioning

confidence: 99%

Virus transport in physically and geochemically heterogeneous subsurface porous media

Bhattacharjee

Ryan

Elimelech

2002

Journal of Contaminant Hydrology

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Water and waste water filtration. Concepts and applications

Cited by 1,521 publications

References 11 publications

Aqueous stability and mobility of C60 complexed by sodium dodecyl benzene sulfonate surfactant

Aqueous stability and mobility of C60 complexed by sodium dodecyl benzene sulfonate surfactant

Hydrodynamic and Chemical Factors in Clogging by Montmorillonite in Porous Media

Virus transport in physically and geochemically heterogeneous subsurface porous media

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