Radiolytic degradation of 2,3,7,8-TCDD in artificially contaminated soils

Journal Article · Thu Dec 01 00:00:00 EST 1994 · Environmental Science and Technology; (United States)

DOI:https://doi.org/10.1021/es00062a008· OSTI ID:6611420

Hillarides, R J; Gray, K A ^[1]; Guzzetta, J; Cortellucci, N; Sommer, C ^[2]

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1. Univ. of Notre Dame, IN (United States)
2. Occidental Chemical Corp., Grand Island, NY (United States)

This paper reports results of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) destruction on artificially contaminated soil using cobalt-60 ([sup 60]Co) [gamma] radiation. Important parameters (soil moisture content, surfactant type/concentration, equilibration, and radiation dose) and their optimum ranges are identified. Scavenger (N[sub 2]O, O[sub 2], 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 (EPA 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. 53 refs., 6 figs., 3 tabs.

• OSTI ID: 6611420
• Journal Information: Environmental Science and Technology; (United States), Vol. 28:13; ISSN 0013-936X
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
DIOXIN
RADIOLYSIS
SOILS
CONTAMINATION
DECONTAMINATION
BY-PRODUCTS
COMPILED DATA
DOSE RATES
GAMMA RADIATION
MOISTURE
NITROUS OXIDE
OXYGEN
PROPANOLS
SURFACTANTS
ALCOHOLS
CHALCOGENIDES
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CLEANING
DATA
DECOMPOSITION
ELECTROMAGNETIC RADIATION
ELEMENTS
HETEROCYCLIC COMPOUNDS
HYDROXY COMPOUNDS
INFORMATION
IONIZING RADIATIONS
NITROGEN COMPOUNDS
NITROGEN OXIDES
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
RADIATION EFFECTS
RADIATIONS
540220* - Environment
Terrestrial- Chemicals Monitoring & Transport- (1990-)
400600 - Radiation Chemistry
400201 - Chemical & Physicochemical Properties