TY - JOUR
T1 - Radiolytic Degradation of 2,3,7,8-TCDD in Artificially Contaminated Soils
AU - Hilarides, R. J.
AU - Gray, K. A.
AU - Guzzetta, J.
AU - Cortellucci, N.
AU - Sommer, C.
PY - 1994/12/1
Y1 - 1994/12/1
N2 - This paper reports results of 2,3,7,8-tetrachlorodibenzo p-dioxin (TCDD) destruction on artificially contaminated soil using cobalt-60 (60Co) γ radiation. Important parameters (soil moisture content, surfactant type/concentration, equilibration, and radiation dose) and their optimum ranges are identified. Scavenger (N2O, O2, 2-propanol) studies were conducted to explore the consequences of controlling oxidative and reductive conditions in the soil, and reaction byproducts have been analyzed under selected reaction conditions. A standard soil (EP A SSM-91) was artificially contaminated with 2,3,7,8-TCDD to 100 ppb, and in the presence of 25 % water and 2 % surfactant (RA-40) and at a high irradiation dose (800 kGy), greater than 92% TCDD destruction was achieved, resulting in a final TCDD concentration of less than 7 ppb. Results of scavenger and byproduct studies and theoretical target theory calculations indicate that TCDD destruction is caused primarily by direct radiation effects and proceeds through reductive dechlorination.
AB - This paper reports results of 2,3,7,8-tetrachlorodibenzo p-dioxin (TCDD) destruction on artificially contaminated soil using cobalt-60 (60Co) γ radiation. Important parameters (soil moisture content, surfactant type/concentration, equilibration, and radiation dose) and their optimum ranges are identified. Scavenger (N2O, O2, 2-propanol) studies were conducted to explore the consequences of controlling oxidative and reductive conditions in the soil, and reaction byproducts have been analyzed under selected reaction conditions. A standard soil (EP A SSM-91) was artificially contaminated with 2,3,7,8-TCDD to 100 ppb, and in the presence of 25 % water and 2 % surfactant (RA-40) and at a high irradiation dose (800 kGy), greater than 92% TCDD destruction was achieved, resulting in a final TCDD concentration of less than 7 ppb. Results of scavenger and byproduct studies and theoretical target theory calculations indicate that TCDD destruction is caused primarily by direct radiation effects and proceeds through reductive dechlorination.
UR - http://www.scopus.com/inward/record.url?scp=0028669908&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0028669908&partnerID=8YFLogxK
U2 - 10.1021/es00062a008
DO - 10.1021/es00062a008
M3 - Article
C2 - 22176042
AN - SCOPUS:0028669908
SN - 0013-936X
VL - 28
SP - 2249
EP - 2258
JO - Environmental Science & Technology
JF - Environmental Science & Technology
IS - 13
ER -