TY - JOUR
T1 - Aqueous phase oxidation
T2 - The effect of soil on oxidation kinetics
AU - Scott Willms, R.
AU - Wetzel, D. M.
AU - Reible, D. D.
AU - Harrison, D. P.
PY - 1988
Y1 - 1988
N2 - The aqueous phase oxidation of m-xylene and tetrachloroethylene has been studied in a batch reactor over a temperature and pressure range of 523 to 563 K and 10.3 to 17.2 MPa, respectively, in the presence of a well-characterized soil. Oxidation rates have been compared to previously measured rates in the absence of soil. The soil has been found to have a serious inhibiting effect on m-xylene oxidation, but to have virtually no effect on the rate of tetrachloroethylene disappearance. The m-xylene inhibition is interpreted by postulating that the soil serves as a free radical scavenger, thus preventing the concentration of free radicals in solution from reaching the level required for the chain mechanism to become self-propagating. An alternate and substantially slower mechanism then becomes responsible for m-xylene oxidation in the presence of soil. In contrast, soil-free tetrachloroethylene oxidation is not thought to proceed by a free radical mechanism. Hence, the addition of the soil has no effect on its oxidation rate.
AB - The aqueous phase oxidation of m-xylene and tetrachloroethylene has been studied in a batch reactor over a temperature and pressure range of 523 to 563 K and 10.3 to 17.2 MPa, respectively, in the presence of a well-characterized soil. Oxidation rates have been compared to previously measured rates in the absence of soil. The soil has been found to have a serious inhibiting effect on m-xylene oxidation, but to have virtually no effect on the rate of tetrachloroethylene disappearance. The m-xylene inhibition is interpreted by postulating that the soil serves as a free radical scavenger, thus preventing the concentration of free radicals in solution from reaching the level required for the chain mechanism to become self-propagating. An alternate and substantially slower mechanism then becomes responsible for m-xylene oxidation in the presence of soil. In contrast, soil-free tetrachloroethylene oxidation is not thought to proceed by a free radical mechanism. Hence, the addition of the soil has no effect on its oxidation rate.
UR - http://www.scopus.com/inward/record.url?scp=0023856526&partnerID=8YFLogxK
U2 - 10.1089/hwm.1988.5.65
DO - 10.1089/hwm.1988.5.65
M3 - Article
AN - SCOPUS:0023856526
SN - 0882-5696
VL - 5
SP - 65
EP - 71
JO - Hazardous Waste and Hazardous Materials
JF - Hazardous Waste and Hazardous Materials
IS - 1
ER -