Influence of cosolvents on quinoline sorption by subsurface materials and clays

Zachara, John M.; Ainsworth, Calvin C.; Schmidt, R.L.; Resch, Charles T.

doi:10.1016/0169-7722(88)90011-3

Cited by 20 publications

(9 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This relationship has been further extended to miscible solvent-water systems (e.g., methanol-water). For example, as the cosolvent fraction in a binary solvent increases, HOC solubility increases log-linearly (17,18), while sorption decreases similarly (11,(19)(20)(21)(22)(23)(24). This relationship is consistent with the solvophobic theory employed in reversed-phase liquid chromatography (RPLC) (25), which interprets the energetics of HOC retention by a nonpolar reversed-phase sorbent in a polar solvent in terms of the bulk solvent properties (23).…”

Section: Discussionsupporting

confidence: 69%

“…Recent studies have shown that with increasing methanol content decreases in sorption of weakly acidic organic solutes, such as -naphthol (18) and pentachlorophenol (21), are also log-linear. Decreases in the sorption of organic bases, such as quinoline, from mixed solvents can also be described by the log-linear model, as shown recently by Zachara et al (22). HOC Sorption from Biphasic Solvents.…”

Section: Resultsmentioning

confidence: 73%

“…This is indeed true for nonpolar organic solutes in mixtures of polar solvents, particularly water and CMOSs. Cosolvent effects on ionizable organic solutes can also be described by the log-linear model (18,21,22). Recent studies have shown that with increasing methanol content decreases in sorption of weakly acidic organic solutes, such as -naphthol (18) and pentachlorophenol (21), are also log-linear.…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Cosolvency and sorption of hydrophobic organic chemicals

Rao¹,

Lee²,

Pinal³

1990

Environ. Sci. Technol.

View full text Add to dashboard Cite

Sorption of hydrophobic organic chemicals (HOCs) by two soils was measured from mixed solvents containing water plus completely miscible organic solvents (CMOSs) and partially miscible organic solvents (PMOSs). The utility of the log-linear cosolvency model for predicting HOC sorption from solvent mixtures was evaluated. Cosolvent effects of PMOSs on HOC solubility and sorption were compared. Nonpolar PMOSs (e.g., toluene, p-xylene, and TCE) have low aqueous solubilities and when present either as a cosolvent/ cosolute in the aqueous phase or as a separate liquid phase do not significantly influence HOC sorption by soils. In contrast, polar PMOSs (e.g., nitrobenzene and o-cresol) have sufficiently high aqueous solubilities that significant decreases in HOC sorption can be measured. The presence of a CMOS increases the PMOS solubility which, in turn, is reflected in increased solubility and decreased sorption of HOCs. Results presented suggest that water-PMOS and sorbent-PMOS interactions need to be considered in predicting the cosolvency of a polar PMOS.

show abstract

Section: Discussionsupporting

confidence: 69%

Section: Resultsmentioning

confidence: 73%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Cosolvency and sorption of hydrophobic organic chemicals

Rao¹,

Lee²,

Pinal³

1990

Environ. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…Miscible displacement techniques were used to measure sorption and transport of the above compounds during steady, saturated water flow conditions through homogeneously packed, sterile or bacteriuminoculated, soil columns. A fine-texture silt loam soil (Norborne; fine-loamy, mixed, mesic Typic Argiudoll) was chosen for these experiments because of the extensive characterization of quinoline sorption by this soil (53,54). Sorption of naphthalene by the organic fraction of soil is well documented (13,24).…”

mentioning

confidence: 99%

Impact of Bacterial Biomass on Contaminant Sorption and Transport in a Subsurface Soil

Bellin

Rao

1993

Appl Environ Microbiol

View full text Add to dashboard Cite

The objective of this study was to investigate the impact of bacterial biomass on the sorption and transport of three solutes (quinoline, naphthalene, and 45Ca) in a subsurface soil. Miscible displacement techniques were employed to measure sorption and transport of the above compounds during steady, saturated water flow in sterile and/or bacterium-inoculated soil columns. The soil was inoculated with either a quinoline-degrading bacterium, Pseudomonas sp. 3N3A isolate, or its mutant isolate, B53, which does not degrade quinoline. In soil columns inoculated with the B53 and 3N3A isolates, quinoline sorption was reduced by about 60 and 20%o, respectively. In contrast, 45Ca sorption was minimally reduced, which indicated that biomass did not significantly alter the cation-exchange capacity of the soil. Biomass impacts on sorption were solute specific, even when the sorption mechanism for both quinoline and 45Ca was similar. Thus, the differential response is attributed to biomass-induced changes in quinoline speciation; an increase in pH at the sorbent-water interface would result in a larger proportion of the neutral species and a decrease in sorption. Sorption of naphthalene was reduced by about 30%o, which was attributed to accessibility of hydrophobic regions. Minimal biosorption of all solutes indicated negligible biofacilitated transport. Alteration of the soil surfaces upon addition of bacterial biomass reduced sorption of quinoline and naphthalene, thereby enhancing transport.

show abstract

“…Adsorption of ANHs is generally controlled by a combination of electrostatic, London-van der Waals, and entropic forces. The relative contribution of each to the adsorptive process is dependent on the given adsorbate, adsorbent, and solvent [16,[26][27][28][29]. The ANHs are organic bases and form cations when protonated.…”

Section: Adsorption Of 2-methylpyridine On Clay Minerals and Dowexmentioning

confidence: 99%

Effects of sorption on the biodegradation of 2‐methylpyridine in aqueous suspensions of reference clay minerals

O’Loughlin¹,

Traina²,

Sims

2000

Enviro Toxic and Chemistry

View full text Add to dashboard Cite

The effects of sorption on the bioavailability of 2‐methylpyridine (2‐MP) were investigated by determining the biodegradation of 2‐MP by an Arthrobacter sp. in aqueous suspensions of reference clay minerals and a synthetic cation exchange resin. Adsorption of 2‐MP on kaolinite, illite, hectorite, montmorillonite, and Dowex® was determined by the batch equilibrium method. In general, adsorption of 2‐MP was positively correlated with the cation exchange capacity of the sorbent, suggesting that sorption of 2‐MP on clay minerals occurs through a cation exchange reaction via the 2‐methylpyridinium ion. The biodegradation of 2‐MP was most rapid in the kaolinite suspensions, followed by no clay > illite ≫ Dowex > hectorite/montmorillonite. With the exception of kaolinite, adsorption of 2‐MP on clay minerals and Dowex reduced the rate of biodegradation. The degree of attenuation was positively correlated with the fraction of 2‐MP sorbed, suggesting that sorbed 2‐MP was not directly available for degradation. Desorption was not rate limiting in suspensions containing hectorite, montmorillonite, or Dowex; however, desorption may have become limiting in the kaolinite and illite suspensions. The results of this study clearly indicate that adsorption can directly affect the degradation of 2‐MP in complex mineral systems.

show abstract

Influence of cosolvents on quinoline sorption by subsurface materials and clays

Cited by 20 publications

References 27 publications

Cosolvency and sorption of hydrophobic organic chemicals

Cosolvency and sorption of hydrophobic organic chemicals

Impact of Bacterial Biomass on Contaminant Sorption and Transport in a Subsurface Soil

Effects of sorption on the biodegradation of 2‐methylpyridine in aqueous suspensions of reference clay minerals

Contact Info

Product

Resources

About