Volatile organic compounds approach

This experiment provides an alternative approach to measuring the partition coefficient (Henry s law constant) for volatile organic compounds in water. A OV-101 packed column and flame ionization detector are used. 

For the charcoal, XAD, and PUF adsorbents discussed above, solvent extraction techniques have been developed for the removal and concentration of trapped analytes. Although thermal desorption has been used with Tenax-GC in some specialized air sampling situations [primarily with sampling volatile organic compounds (EPA, Method TO-17 )], this approach is not a viable alternative to solvent extraction for the charcoal, XAD, and PUF adsorbents. The polystyrene and PUF adsorbents are thermally unstable and the charcoal chemisorption bonding is more easily broken by... 

Mackay, D., Shiu, W.Y. (1990) Physical-chemical properties and fate of volatile organic compounds an application of the fugacity approach. In Significance and Treatment of Volatile Organic Compounds in Water Supplies. Ram, N.M., Christman, R.F., Cantor, K.P., Eds., pp. 183-203, Lewis Publishers, Chelsea, Michigan. 

Thoms, S.R., Lion, L.W. (1992) Vapor-phase partitioning of volatile organic compounds a regression approach. Environ. Toxicol. Chem. 11, 1377-1388. 

Olson, D.A., S. Varma and R. L. Corsi (1998), Anew approach for estimating volatile organic compound emissions from sewers Methodology and associated errors, Water Env. Res., 70(3), 276-282. 

The effect of the UK legislation on solvent emissions on manufacture of coatings is discussed. Two choices are available for volatile organic compound emission control, i.e. either to maintain the total of all captured emissions plus uncaptured emissions below a specified percentage of the input solvents, or to maintain just the captured emissions below a specified percentage of the input solvents and to meet a specified concentration emission limit on all captured emissions. The use of a mass balance for compliance demonstration is described, together with the approach used by the British Coatings Federation (as published in The VOC Workbook). 

Bobadilla, R., Huybrechts, T., and Van Langenhove, H. Determination of the Henry s constant of volatile and semi-volatile organic compounds of environmental concern by the BAS (batch air stripping) technique a new mathematical approach, /. Chil Chem. Soc., 48(3) 7-ll, 2003. 

Catalytic oxidation is capable of treating contaminant concentrations ranging from 1 part per million (ppm) to 20,000 ppm. Typically, it is applied to streams containing about 3000 ppm per volume or less of volatile organic compounds (VOCs). At levels approaching 3000 ppm per volume VOCs, the recoverable heat from the process may be sufficient to sustain oxidation without additional fuel. 

Jang, M., and R. M. Kaniens, A Thermodynamic Approach for Modeling Partitioning of Semi-Volatile Organic Compounds on Atmospheric Particulate Matter Humidity Effects, Environ. Sci. Technol., 32, 1237-1243 (1998). 

Another relatively new SPE approach originally developed for the analysis of volatile organic compounds in environmental samples is solid-phase microextraction (SPME). This technique has gained acceptance for a wide variety of additional applications for the isolation of organic compounds from aqueous solu-... 

NECDF uses neutralization (hydrolysis) technology instead of incineration. Air emissions were determined to be the only potential source of risk to the surrounding population. The risk assessment approach developed for NECDF concluded that, based on the samples collected, no risk from air emissions exists at this site. Forty-eight chemicals of concern were expected to be present at trace levels. Four sampling events occurred during which none of the chemicals of concern were detected, nor were any volatile organic compounds detected (Rowden et al., 2006). 

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