Adsorption of Metals by Geomedia: Data Analysis, Modeling, Controlling Factors, and Related Issues

Jenne, E.A.

doi:10.1016/b978-012384245-9/50002-5

Cited by 41 publications

(41 citation statements)

References 132 publications

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“…The measured surface area is about 0.9 m 2 g -1 for untreated bagasse and 1.4 m 2 g -1 for treated bagasse. It is noticeable that the surface area of treated bagasse is about 47 times higher than that of fine-grain sand (60 × 100 mesh U.S. standard, 0.03 m 2 g -1 ) reported in the literature [20]. Treated bagasse has a 1.56 times higher surface area than untreated bagasse.…”

Section: Surface Area Measurementmentioning

confidence: 80%

“…The water sorption capacity, an important characteristic in saturated environments, of each sorbent was measured in triplicate with time. Each sorbent material was applied to the water surface in a 100-mL beaker and allowed to absorb water for specific soaking times (10,20,40, and 80 min). After the specified soaking time, the wet sorbent was drained on the filter paper for 10 min under vacuum filtration.…”

Section: Characterizations Of the Sorbentsmentioning

confidence: 99%

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Partially Acetylated Sugarcane Bagasse for Wicking Oil from Contaminated Wetlands

2011

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Sugarcane bagasse was partially acetylated to enhance its oil‐wicking ability in saturated environments while holding moisture for hydrocarbon biodegradation. The water sorption capacity of raw bagasse was reduced fourfold after treatment, which indicated considerably increased hydrophobicity but not a limited capability to hold moisture for hydrocarbon biodegradation. Characterization results by Fourier transform infrared (FT‐IR), scanning electron microscopy (SEM), X‐ray diffraction (XRD), and surface area analyzer suggested that treated bagasse exhibited enhanced hydrophobicity and surface area. Oil wicking test results indicate that treated bagasse is more effective in wicking oil from highly saturated environments than raw bagasse and suggest that application of this material in remediation of oil spills in highly saturated wetlands is promising.

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Section: Surface Area Measurementmentioning

confidence: 80%

Section: Characterizations Of the Sorbentsmentioning

confidence: 99%

Partially Acetylated Sugarcane Bagasse for Wicking Oil from Contaminated Wetlands

2011

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“…Finally, reverse osmosis is the simplest of all the methods discussed. This simplicity makes it a very attractive option [2].…”

Section: Current Methods Of Heavy Metal Removal From Wastewatermentioning

confidence: 99%

Kinetics of Iron (II) Removal from Aqueous Solution Using Activated Dolomite

Walker¹,

Connor²,

Allen³

2007

TOCENGJ

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Experimental investigations were undertaken in batch kinetic systems, for the removal of iron (II) from aqueous solutions using activated dolomite. The effect of the extent dolomite activation on the dissolution of magnesium and calcium from the dolomite lattice was determined. Under optimum experimental conditions there was a direct linear relationship between magnesium dissolution and iron (II) removal from bulk solution. The experimental data were mathematically described using empirical external mass transfer and pseudo-intra-particle diffusion models. The data show conformity with a three stage process, with the iron (II) removal rate showing good correlation with external mass transfer (t < 1 min) and two rates of pseudo-intra-particle diffusion (1 < t < 90mins, and t > 90mins).

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“…Consequently Westall and Hohl (1980) concluded that one could model a given set of experimental data with several different models and achieve comparable accuracy. More recent investigators have questioned the self consistency of surface complexation models and even suggested that current efforts may be more an exercise in fitting data (Sprycha, 1984;Janssen and Stein, 1986;Smith and Jenne, 1991;Lutzenkirchen, 1999;Jenne, 1998;Zuyi et al, 2000;Dyer et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Extending the diffuse layer model of surface acidity behavior: I. Model development

Loux

2006

Chemical Speciation & Bioavailability

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Considerable disenchantment exists within the environmental research community concerning our current ability to accurately model surface -complexation -mediated low -porewater -concentration ionic contaminant partitioning with natural surfaces. Several authors attribute this unacceptable variation to uncertainties in our understanding of surface acidity behavior. In support of this contention, many authors are not satisfied with our ability to model surface acidity behavior in controlled, pure phase laboratory systems. The present work was designed to more closely examine the theoretical aspects of those variable energies likely to be contributing to the excess free energies associated with surface acidity behavior. Conclusions from the work include: (1) the excess free energy term associated with chargeypotential relationships is given by: DG excess;sigmaypsi ¼ DG electrostatic þ DG hydration þ DG dipole þ DG Debye Huckel , (2) the excess free energy terms included in effective acidity constant behavior includes a charging energy term: DG excess;pK ¼ DG excess;sigmaypsi þ DG charging , (3) under conditions where ÀDG excess;sigmaypsi 4RT, DG excess;sigmaypsi % DG excess;pK % DG electrostatic þ DG hydration (thereby supporting historical methodologies), (4) under conditions where ÀDG excess;sigmaypsi % RT, DG excess is better approximated by: DG excess;sigmaypsi % DG electrostatic þ DG hydration and DG excess;pK % DG excess;sigmaypsi þ DG charging , (5) DG charging becomes increasingly significant with decreased counterion condensation, and (6) asymmetric behavior in the charge dependency of effective acidity constant behavior is predicted -particularly when charging energies become significant.

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Adsorption of Metals by Geomedia: Data Analysis, Modeling, Controlling Factors, and Related Issues

Cited by 41 publications

References 132 publications

Partially Acetylated Sugarcane Bagasse for Wicking Oil from Contaminated Wetlands

Partially Acetylated Sugarcane Bagasse for Wicking Oil from Contaminated Wetlands

Kinetics of Iron (II) Removal from Aqueous Solution Using Activated Dolomite

Extending the diffuse layer model of surface acidity behavior: I. Model development

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