Air-water partitioning coefficients of organics in dilute aqueous solutions

Ashworth, Richard A.; Howe, G.B.; Mullins, Michael E.; Rogers, Tony

doi:10.1016/0304-3894(88)85057-x

Cited by 211 publications

(101 citation statements)

References 9 publications

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“…w and thus prevents elimination of these compounds due to uncertainties in the reported [\D. c AH: Ashworth, Howe et al (1988); B 1: Betterton (1991); BC: Bone, Cullis and Wolfenden (1983); BH 1 : Betterton and Hoffmann (1988); BH2: Benkelberg, Hamm and Warneck ( 1995); GCE: estimated from group contribution method; HMI: Hoff, MacKay et al (1993); HM2: Hine and Mookerjee (1975); KB: Khan, Brimblecombe and Clegg (1995); KS: Kames and Schurath (1992); NO: Nielsen, Olsen and Frendenslund (1994); XY: estimated from x-y data; ZM: Zhou and Mopper (1990). would imply that in some instances a substantial fraction of oxalic acid may be present in the gas phase. To our knowledge, oxalic acid has not been observed in the gas phase in measurable quantities : Lefer et al (1994) detected vapor-phase oxalic acid in biomass burning plumes, but the concentrations in the background air were below the detection limit (,-~ 10 ppt).…”

Section: Discussionmentioning

confidence: 99%

Water-soluble organics in atmospheric particles: A critical review of the literature and application of thermodynamics to identify candidate compounds

1996

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Although organic compounds typically constitute a substantial fraction of the fine particulate matter (PM) in the atmosphere, their molecular composition remains poorly characterized. This is largely because atmospheric particles contain a myriad of diverse organic compounds, not all of which extract in a single solvent or elute through a gas chromatograph; therefore, a substantial portion typically remains unanalyzed. Most often the chemical analysis is performed on a fraction that extracts in organic solvents such as benzene, ether or hexane; consequently, information on the molecular composition of the water-soluble fraction is particularly sparse and incomplete.This paper investigates theoretically the characteristics of the water-soluble fraction by splicing together various strands of information from the literature. We identify specific compounds that are likely to contribute to the water-soluble fraction by juxtaposing observations regarding the extraction characteristics and the molecular composition of atmospheric particulate organics with compound-specific solubility and condensibility for a wide variety of organics. The results show that water-soluble organics, which constitute a substantial fraction of the total organic mass, include C2 to C7 multifunctional compounds (e.g., diacids, polyols, amino acids). The importance of diacids is already recognized; our results provide an impetus for new experiments to establish the atmospheric concentrations and sources of polyols, amino acids and other oxygenated multifunctional compounds.

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Section: Discussionmentioning

confidence: 99%

Water-soluble organics in atmospheric particles: A critical review of the literature and application of thermodynamics to identify candidate compounds

1996

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“…The chlorinated aliphatic compounds are especially volatile with dimensionless Henry's law constants of up to 0.64 (10øC) [Asworth, 1988 ] for tetrachloromethane. The BTEX compounds are also volatile, while the remaining compounds have Henry's law constants of less than 0.02 (Table 1).…”

Section: Introductionmentioning

confidence: 99%

An anaerobic field injection experiment in a landfill leachate plume, Grindsted, Denmark: 1. Experimental setup, tracer movement, and fate of aromatic and chlorinated compounds

Rügge¹,

Bjerg²,

Pedersen³

et al. 1999

Water Resources Research

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“…Values of H C for MTBX were calculated at 30°C, as described by Ashworth et al, [26]. The concentrations of MTBX given in all of the figures in this paper are the liquid-phase concentrations.…”

Section: Biodegradation Of Individual Mtbxmentioning

confidence: 99%

Isolation and Characterization of Potent Strains for Metabolizing Paint VOCs from an Active Trickle‐bed Air Biofilter

Mathur

Majumder

2008

Chem Eng & Technol

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In this study, seven strains of cells were isolated from a trickle-bed air biofilter used for continuously treating paint of volatile organic compounds (VOCs) for six months. The morphology and biochemical study was conducted by streaking isolated mixed culture in solid agar slant media and the cell shapes were identified by using an electron microscope. It was found that this mixed culture was gramnegative for seven different isolates. The isolated strains were grown on substrates including methyl ethyl ketone (MEK), toluene, n-butyl acetate, and o-xylene (MTBX), as the carbon and energy sources. Among the seven isolates, an AKM 02 strain had a high MTBX-degrading activity and was identified as Shewanella putrefaciens by taxonomical analysis, biochemical tests and 16S rDNA gene analysis methods. All isolates grew in a pH range from 3.0-11.0 with an optimum range of 6.0-8.0. In addition, each of the isolates grew in the temperature range of 15-45°C with an optimum range between 25-30°C. The batch experiments were conducted at four different initial MTBX concentrations ranging from 100-1000 mg L -1 . S. putrefaciens was capable of completely degrading n-butyl acetate, MEK and toluene at a concentration lower than 500 mg L -1. When the initial concentration of n-butyl acetate, MEK and toluene were 500 mg L -1 , S. putrefaciens could remove the n-butyl acetate, MEK and toluene completely within 70, 98 and 110 h, respectively. However, for o-xylene at concentration of 500 mg L -1 , incomplete degradation was observed with only 70 % of the o-xylene degraded after 135 h. Collectively, the results indicate that the S. putrefaciens strain degrades MTBX at a faster rate, and this strain can be used effectively in trickle-bed air biofilters for treating high strength mixtures of paint solvents.

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Air-water partitioning coefficients of organics in dilute aqueous solutions

Cited by 211 publications

References 9 publications

Water-soluble organics in atmospheric particles: A critical review of the literature and application of thermodynamics to identify candidate compounds

Water-soluble organics in atmospheric particles: A critical review of the literature and application of thermodynamics to identify candidate compounds

An anaerobic field injection experiment in a landfill leachate plume, Grindsted, Denmark: 1. Experimental setup, tracer movement, and fate of aromatic and chlorinated compounds

Isolation and Characterization of Potent Strains for Metabolizing Paint VOCs from an Active Trickle‐bed Air Biofilter

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