Nonequilibrium Sorption of Organic Contaminants During Flow Through Columns of Aquifer Materials

Lee, L. S.; Rao, P. S. C.; Brusseau, M. L.; Ogwada, R. A.

doi:10.1897/1552-8618(1988)7[1047:nsoocd]2.0.co;2

Cited by 29 publications

(52 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These values are similar to values reported in the literature for trichloroethene (ranging from 0.01 to 0.24 mL g −1 ) for aquifer materials with similarly low organic-carbon contents (Lee et al, 1988; Brusseau et al, 1991; Larson et al, 1992; Benker et al, 1998; Carmichael et al, 1999: Rivett and Allen-King, 2003). Previous experimental results have shown that sorption of trichloroethene by the aquifer material is nonlinear.…”

Section: Resultssupporting

confidence: 90%

Mass removal and low-concentration tailing of trichloroethene in freshly-amended, synthetically-aged, and field-contaminated aquifer material

Johnson¹,

Norris²,

Brusseau³

2009

Chemosphere

View full text Add to dashboard Cite

This study investigates the effect of contaminant aging on the sorption/desorption and transport of trichloroethene in a low organic-carbon content aquifer material, comparing mass removal and longterm, low-concentration elution tailing for field-contaminated, synthetically-aged (contact times of approximately four years), and freshly-amended aquifer material. Elution of trichloroethene exhibited extensive low-concentration tailing, despite minimal retention of trichloroethene by the aquifer material. The observed nonideal transport behavior of trichloroethene is attributed primarily to rate-limited sorption/desorption, with a smaller contribution from nonlinear sorption. It is hypothesized that interaction with physically condensed carbonaceous material, comprising 61% of the aquifer material's organic-carbon content, mediates the retention behavior of trichloroethene. The elution behavior of trichloroethene for the field-contaminated and aged treatments was essentially identical to that observed for the fresh treatments. In addition, the results of three independent mass-balance analyses, total mass eluted, solvent-extraction analysis of residual sorbed mass, and aqueous-phase concentration rebounds following stop-flow experiments, showed equivalent recoveries for the aged and fresh treatments. These results indicate that long-term contaminant aging did not significantly influence the retention and transport of trichloroethene in this low organic-carbon aquifer material.

show abstract

Section: Resultssupporting

confidence: 90%

Mass removal and low-concentration tailing of trichloroethene in freshly-amended, synthetically-aged, and field-contaminated aquifer material

Johnson¹,

Norris²,

Brusseau³

2009

Chemosphere

View full text Add to dashboard Cite

show abstract

“…Competitive sorption effects were reported for lower concentrations of PCE. The impact of a co-solute (p-xylene) on sorption of trichloroethene by Borden sediment was investigated by Lee et al (1988). They reported no measurable competitive sorption.…”

Section: Resultsmentioning

confidence: 99%

“…Two samples were collected from different locations, with one (used for experiments 1 and 2 in Figure 1) collected adjacent to the injection zone. The properties of the Borden sediment, and its sorption of organic compounds, have been characterized in several studies (e.g., Curtis et al, 1986; Lee et al, 1988; Ball and Roberts, 1991; Ran et al, 2003; Rivett and Allen-King, 2003). Eustis sandy surface soil was collected from the University of Florida campus.…”

Section: Methodsmentioning

confidence: 99%

“…Several studies have been conducted to examine the impact of co-solutes on sorption of lower-polarity organic compounds by natural soils and sediments (e.g., Lee et al, 1988; McGinley et al; 1993; Xing et al, 1996; Xing and Pignatello, 1997; White and Pignatello, 1999; White et al, 1999; Li and Werth, 2001; Rivett and Allen-King, 2003; Ju and Young, 2004; Zhang et al, 2010; Xiao and Huang, 2011). The majority of such experiments have used porous media with total organic-carbon contents of 1% or greater.…”

Section: Introductionmentioning

confidence: 99%

“…The majority of such experiments have used porous media with total organic-carbon contents of 1% or greater. Conversely, few have been conduced using media with organic-carbon contents between 0.1 and 1% (McGinley et al, 1993; Li and Werth, 2001; Zhang et al, 2010), and fewer still with values less than 0.1% (Lee e al., 1988; Rivett and Allen-King, 2003). …”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Nonideal transport of contaminants in heterogeneous porous media: 10. Impact of co-solutes on sorption by porous media with low organic-carbon contents

et al. 2012

View full text Add to dashboard Cite

The impact of co-solutes on sorption of tetrachloroethene (PCE) by two porous media with low organic-carbon contents was examined by conducting batch experiments. The two media (Borden and Eustis) have similar physical properties, but significantly different organic-carbon (OC) contents. Sorption of PCE was nonlinear for both media, and well-described by the Freundlich equation. For the Borden aquifer material (OC = 0.03%), the isotherms measured with a suite of co-solutes present (1,2-dichlorobenzene, bromoform, carbon tetrachloride, and hexachloroethane) were identical to the isotherms measured for PCE alone. These results indicate that there was no measurable impact of the co-solutes on PCE sorption for this system. In contrast to the Borden results, there was a measureable reduction in sorption of PCE by the Eustis soil (OC = 0.38%) in the presence of the co-solutes. The organic-carbon fractions of both media contain hard-carbon components, which have been associated with the manifestation of nonideal sorption phenomena. The disparity in results observed for the two media may relate to relative differences in the magnitude and geochemical nature of these hard-carbon components.

show abstract

Humic acid‐modified silica as a model aquifer material

Burris¹,

Antworth²,

Stauffer³

et al. 1991

Enviro Toxic and Chemistry

View full text Add to dashboard Cite

The sorption behavior of nonionic organic chemicals on humic acid-modified silica was examined to assess its possible use as a simplified model of natural low organic carbon aquifer materials. Column and batch sorption experiments were conducted on humic acid-coated silica (0.073% organic carbon), using tetrachloroethylene (PCE) and 1-methylnaphthalene (MN). Batch kinetic experiments showed that equilibrium was attained rapidly for PCE (-1 d), whereas several tens of days were required for MN. Batch experiment results indicated Freundlich (nonlinear) isotherm behavior when a wide concentration range was examined. Sorption coefficients derived from the column experiments were consistent with the batch-derived Freundlich isotherms, illustrating the importance of isotherm type on breakthrough curves and solute transport in ground water. Similarities exist between the sorption behavior observed in this study and that of a number of natural aquifer materials. Humic acid-modified silica serves as a simplified model for aquifer materials, which tend to be more complex and difficult to characterize and can be used to examine organic solute transport processes in ground water.

show abstract

Nonequilibrium Sorption of Organic Contaminants During Flow Through Columns of Aquifer Materials

Cited by 29 publications

References 17 publications

Mass removal and low-concentration tailing of trichloroethene in freshly-amended, synthetically-aged, and field-contaminated aquifer material

Mass removal and low-concentration tailing of trichloroethene in freshly-amended, synthetically-aged, and field-contaminated aquifer material

Nonideal transport of contaminants in heterogeneous porous media: 10. Impact of co-solutes on sorption by porous media with low organic-carbon contents

Humic acid‐modified silica as a model aquifer material

Contact Info

Product

Resources

About