Treatment of four biorefractory contaminants in soils using catalyzed hydrogen peroxide

Journal Article · · Journal of Environmental Quality; (United States)

DOI:https://doi.org/10.2134/jeq1991.00472425002000040021x· OSTI ID:5912208

Tyre, B W ^[1]; Watts, R J ^[2]; Miller, G C ^[3]

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1. Washoe County Dept. of Health, Reno, NV (United States)
2. Washington State Univ., Pullman (United States)
3. Univ. of Nevada, Reno (United States)

The treatment of soil with pentachlorophenol, trifluralin, hexadecane, and dieldrin using catalyzed hydrogen peroxide (H{sub 2}O and iron(II)) was investigated in a soil of low development with organic C ranging from 2,000 mg kg{sup {minus}1} to 16,000 mg kg{sup {minus}1}. Soil treatment was conducted at pH 3 with 240 and 400 mg L{sup {minus}1} iron additions and 120,000 mg L{sup {minus}1} H{sub 2}O{sub 2}. Pentachlorophenol and trifluralin degradation rates decreased as a function of soil organic C content. However, soil organic C had no effect on the degradation rates of dieldrin and hexadecane. In addition, the four contaminant degraded at equal rates with soil containing organic C > 10,000 mg kg{sup {minus}1}. The ratio of first-order rate constant for contaminant degradation to hydrogen peroxide consumption was used as an empirical measure of treatment efficiency. These ratios were sensitive to both the soil and organic C content and to the concentration of iron added during treatment. The efficiency ratios were highest for treatment with no iron addition; these data suggest that iron minerals and H{sub 2}O{sub 2} provide a system in which Fenton-like oxidations pentachlorophenol was evaluated in goethite-, hematite-, and magnetite-silica sand at pH 3. Pentachlorophenol was degraded in the mineral-silica sand systems.

• OSTI ID: 5912208
• Journal Information: Journal of Environmental Quality; (United States), Journal Name: Journal of Environmental Quality; (United States) Vol. 20:4; ISSN JEVQA; ISSN 0047-2425
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020900 -- Petroleum-- Environmental Aspects
54 ENVIRONMENTAL SCIENCES
540220* -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (1990-)
CARBON COMPOUNDS
CATALYTIC EFFECTS
CHEMICAL REACTIONS
CLEANING
DECONTAMINATION
EFFICIENCY
ELEMENTS
HERBICIDES
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROGEN PEROXIDE
IRON
METALS
ORGANIC COMPOUNDS
OXIDATION
OXYGEN COMPOUNDS
PERFORMANCE
PEROXIDES
PESTICIDES
SOILS
TRANSITION ELEMENTS
USES