Equilibrium Batch Experiments with Six Polycyclic Aromatic Hydrocarbons and Two Aquifer Materials

Abdul, Abdul S.; Gibson, Thomas L.

doi:10.1089/hwm.1986.3.125

Cited by 45 publications

(22 citation statements)

References 11 publications

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“…Karickhoff [3] and Karickhoff et al [15] reported KO, values for NAPH of 1,300 and 870 on surface soils and sediments, respectively. Abdul and Gibson [7] reported that the KO, for NAPH on Borden aqui- The variation of KO, values on aquifer materials found here is greater than observed for surface soils and may be caused by differences in mineralogy or by the degree of organic diagenesis among the samples. Abdul and Gibson [7] reported that the KO, for NAPH on Borden aqui- The variation of KO, values on aquifer materials found here is greater than observed for surface soils and may be caused by differences in mineralogy or by the degree of organic diagenesis among the samples.…”

Section: Discussioncontrasting

confidence: 47%

Sorption of nonpolar organic chemicals on low‐carbon‐content aquifer materials

Stauffer¹,

Wickman²,

MacIntyre

1989

Enviro Toxic and Chemistry

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Sorption isotherms were measured by batch equilibration methods for three nonpolar organic sorbates on seven subsurface, low‐carbon sedimentary aquifer materials. Radiolabeled (14C) 1‐methylnaphthalene, o‐dichlorobenzene and naphthalene were separately equilibrated with the sorbents to determine sorption coefficients (K). Chemical and physical properties of the aquifer materials were determined. Possible relationships between sorption coefficients and organic carbon (OC) content and other sorbent properties were investigated using multivariate statistics. Sorbent properties used in the statistical analysis were sorption coefficients, percentage OC, percentage sand, percentage clay, percentage silt, specific surface area, cation exchange capacity, percentage 1:1 clay, percentage 2:1 clay and percentage iron content. No predictive relationships between sorption coefficients and aquifer material properties were found. The sorption coefficient does not correlate with any of the properties of the aquifer materials, including OC content for aquifer materials with OC content of less than 0.10%. It is recommended that sorption coefficients be determined experimentally on each different aquifer material for use in ground water transport calculations.

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Section: Discussioncontrasting

confidence: 47%

Sorption of nonpolar organic chemicals on low‐carbon‐content aquifer materials

Stauffer¹,

Wickman²,

MacIntyre

1989

Enviro Toxic and Chemistry

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“…Stuart et al [13] and Abdul and Gibson [14] observed the competitive sorption of polycyclic aromatic hydrocarbons in soil. Stuart et al [13] and Abdul and Gibson [14] observed the competitive sorption of polycyclic aromatic hydrocarbons in soil.…”

Section: Discussionmentioning

confidence: 99%

Enhancing the Bioavailability of Organic Compounds Sequestered in Soil and Aquifer Solids

White

Alexander

Pignatello

1999

Environ Toxicol Chem

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Abstract-A study was conducted to find ways to increase the biodegradability of compounds that have aged in soil or aquifer material and become less bioavailable. Slurrying enhanced the rate and extent of biodegradation by individual bacterial strains of aged and unaged phenanthrene and di(2-ethylhexyl) phthalate in soils and aquifer solids. After bacterial degradation of aged phenanthrene in unslurried soil had largely ceased, the residual compound was metabolized if the soil was slurried and reinoculated with a phenanthrene-degrading bacterium. The rate and extent of biodegradation of aged phenanthrene by Pseudomonas sp. were enhanced when anthracene or pyrene was added to the soil at the same time as the bacterium, although the organism could not metabolize anthracene or pyrene. Moreover, anthracene or pyrene increased the amount of aged phenanthrene removed from soil by a mild extractant. The data show that the bioavailability of organic compounds that become sequestered by aging can be altered by appropriate soil treatments.

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“…To avoid microbial degradation, the soil and the water hoff et al, 1979;Abdul and Gibson, 1986; Weber et al, used for naphthalene solutions were autoclaved for 2 h prior 1992; Pignatello and Xing, 1996), while studies of vapor to each experiment. The autoclaving procedure did not affect the sorption results (not shown).…”

mentioning

confidence: 99%

“…Soil physical properties for L5 and chemical Hydrophobic sorption onto soil organic matter is deproperties for naphthalene are shown in Tables 1 and 2, respecscribed for many chemicals and soil types (e.g., Karicktively. To avoid microbial degradation, the soil and the water hoff et al, 1979;Abdul and Gibson, 1986;Weber et al, used for naphthalene solutions were autoclaved for 2 h prior 1992; Pignatello and Xing, 1996), while studies of vapor to each experiment. The autoclaving procedure did not affect the sorption results (not shown).…”

mentioning

confidence: 99%

Diffusion of Sorbing Organic Chemicals in the Liquid and Gaseous Phases of Repacked Soil

Olesen

Gamst

Møldrup

et al. 2001

Soil Science Soc of Amer J

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sorption onto dry soil mineral surfaces are limited to very few different chemicals and in most cases only TCE Transport models for sorbing organic chemicals in soil require (e.g., Petersen et al., 1994(e.g., Petersen et al., , 1995(e.g., Petersen et al., , 1996a; Ong and Lion, accurate predictions of the diffusion and sorption processes in both the liquid and gaseous phases. In this study, the ability of recently- 1991a,b;Shimuzu et al., 1992Shimuzu et al., , 1994. Consequently, sevpresented diffusivity models in combination with equilibrium sorption eral predictive expressions to estimate hydrophobic admodels to predict the effective (i.e., including sorption effects) diffusorption coefficients from soil and chemical characterission coefficient, D eff , as a function of soil-water content, , is tested tics are available (e.g., Briggs, 1973;Karickhoff, 1981; for different sorbing organic chemicals in different soils. The water- Abdul et al., 1987), while it remains to be verified that induced linear reduction (WLR) gas diffusivity model, combined with recent predictive expressions for vapor sorption of TCE a two-component (hydrophobic and vapor) equilibrium sorption (e.g., Petersen et al., 1995; Poulsen et al., 1998 Poulsen et al., , 2000 model, well described short-term (Ͻ24 h) D eff () of two volatile or- Yamaguchi et al., 1999;Chen et al., 2000) can be applied ganic compounds, toluene and trichloroethylene (TCE), in Yolo loam for other chemicals. (fine-silty, thermic Typic Xerorthent). Further extended with the con-A correct description of diffusion and sorption prostant slope impedance factor (CSIF) solute diffusivity model, the resulting two-phase diffusion and two-component equilibrium sorpcesses in both the soil liquid and gaseous phases is retion (DATES) model accurately predicted short-term (48 h) D eff () quired to accurately predict the effective diffusion of a of a semivolatile pesticide, lindane (C 6 H 6 Cl 6 ), in Gila silt loam (coarsesorbing organic chemical (Ryan and Cohen, 1990). In loamy, thermic Typic Torrifluvents). To test the DATES model for this study, a combined diffusion and sorption theory is longer-term data, D eff () of naphthalene (C 10 H 8 ) in Lerbjerg sandy derived, yielding a two-phase diffusion and two-compoclay (L5) was measured at different soil-water contents and incubation nent equilibrium sorption (DATES) model. The diffutimes in air-tight diffusion cells. Because of sorption kinetics, both sion in the gaseous and liquid phase is predicted using the apparent hydrophobic sorption coefficient, K D , derived from the recently presented gas and solute diffusivity models by column diffusion experiments and K D derived from batch desorption Moldrup et al. (2000a) and Olesen et al. (2001). Sorption experiments increased with naphthalene-soil contact time for t Ͼ 700 h. from the liquid (hydrophobic) and gaseous (vapor) Consequently, an increasing K D value with time was required in the DATES model to obtain successful D eff () predictions. Since chemicalphase need to be e...

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Equilibrium Batch Experiments with Six Polycyclic Aromatic Hydrocarbons and Two Aquifer Materials

Cited by 45 publications

References 11 publications

Sorption of nonpolar organic chemicals on low‐carbon‐content aquifer materials

Sorption of nonpolar organic chemicals on low‐carbon‐content aquifer materials

Enhancing the Bioavailability of Organic Compounds Sequestered in Soil and Aquifer Solids

Diffusion of Sorbing Organic Chemicals in the Liquid and Gaseous Phases of Repacked Soil

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