2,4-D

CAS RN:94-75-7

Disposal Methods

Generators of waste (equal to or greater than 100 kg/mo) containing this contaminant, EPA hazardous waste numbers D016 and U240, must conform with USEPA regulations in storage, transportation, treatment and disposal of waste.

Incineration and landfill: 2,4-D /2,4-dichlorophenoxyacetic acid/ is known to be readily detoxified by soil microorganisms and at low dosages is normally decomposed in one to four weeks. The detection of 2,4-dichlorophenol, 4-chlorocatechol, chloromuconic and succinic acids from either soil or pure culture studies suggests a sequence of reactions involving ring hydroxylation and cleavage and further metabolism of the open chain structure to carbon dioxide. The non-persistence and detoxification of 2,4-D in soil indicate that burial in non-crop areas away from water supplies would be an acceptable method for the disposal of small quantities of 2,4-D. Incineration at high temperatures with sufficient residence time leads to complete detoxification of 2,4-D and is the most environmentally acceptable method for 2,4-D disposal. For the decontamination of 2,4-D containers-drums: triple rinse and drain procedure ("triple rinse" means the flushing of containers three times of the normal diluent equal to approximately 10% of the container's capacity and adding the rinse liquid to the spray mixture or disposing of it by the method prescribed for disposing of the pesticide). Small containers should be punched full of holes, crushed and taken to a landfill.

Chemical treatment: Detoxification requires treatment with chloride of lime or sodium carbonate. Rinse containers with a 5% soln of caustic soda. Farms are allowed to destroy if necessary up to 10 kg of the pesticide. Removal of 17% of 2,4-D /(2,4-dichlorophenoxy)acetic acid/ from water is achieved by coagulation and complete water treatment by ozonation; the use of activated charcoal is an effective treatment technique.

Herbicide orange /was incinerated/ by the use of two identical refractory lined furnaces on board the Mt Vulcanus while at sea. The average wall temperature was 1273 deg C and average flame was 1500 deg C. A residence time of 1.0 second was used. Combustion efficiency was > 99.98%. Destruction efficiency was: 2,4-D > 99.9%; 2,4,5-T > 99.9%; Total hydrocarbon 99.982 to 99.992%; Herbicide orange > 99.999%; 2,3,7,8-tetrachlorodibenzo-p-dioxin > 99.93 to > 99.99%; Chlorinated hydrocarbons > 99.999%. /From table/

Waste treatment methods. Product: Offer surplus and non-recyclable solutions to a licensed disposal company. Contact a licensed professional waste disposal service to dispose of this material. Dissolve or mix the material with a combustible solvent and burn in a chemical incinerator equipped with an afterburner and scrubber. Contaminated packaging: Dispose of as unused product.

SRP: Wastewater from contaminant suppression, cleaning of protective clothing/equipment, or contaminated sites should be contained and evaluated for subject chemical or decomposition product concentrations. Concentrations shall be lower than applicable environmental discharge or disposal criteria. Alternatively, pretreatment and/or discharge to a permitted wastewater treatment facility is acceptable only after review by the governing authority and assurance that "pass through" violations will not occur. Due consideration shall be given to remediation worker exposure (inhalation, dermal and ingestion) as well as fate during treatment, transfer and disposal. If it is not practicable to manage the chemical in this fashion, it must be evaluated in accordance with EPA 40 CFR Part 261, specifically Subpart B, in order to determine the appropriate local, state and federal requirements for disposal.

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