| 처리 방법 | Generators of waste (equal to or greater than 100 kg/mo) containing this contaminant, EPA hazardous waste numbers F027 & U232, must conform with USEPA regulations in storage, transportation, treatment and disposal of waste.Chemical treatment: 2,4,5-T /2,4,5-trichlorophenoxyacetic acid/ is cleaved by strong acid to 2,4,5-trichlorophenol, formaldehyde and carbon dioxide. Glycollic acid appears to be an intermediate. This hydrolysis requires heating with concentrated acid or pyridine hydrochloride. 2,4,5-T is completely degraded by alkali metals (sodium or lithium) in liquid ammonia, but the degradation products have not been identified. Chlorination is capable of destroying 2,4,5-T. Aqueous hypochlorite at pH 3 and temp above 30 °C will yield herbicidally inactive products, but the products have not been characterized. At high temp (about 400 °C) chlorinolysis can degrade 2,4,5-T to a mixture of carbon tetrachloride, phosgene, and hydrogen chloride. None of these reactions are practical detoxification approaches for 2,4,5-T. Chemical treatment is not considered a viable approach for degrading the trace quantities of TCDD /2,3,7,8-tetrachlorodibenzo-p-dioxin/. Cleavage of the ether and dechlorination requires highly reactive chemical reagents, such as strong acid or sodium amide. Both 2,4,5-T and 2,3,7,8-tetrachlorodibenzo-p-dioxin are degraded by photochemical reactions. 2,4,5-T is detoxified by microbial activity in a period of 45 to 270 days. The biodegradation is most rapid in warm, aerated, moist soils, and aerobic activity is preferred. 2,3,7,8-tetrachlorodibenzo-p-dioxin is relatively persistent in soil. Approx 60% was recovered after 1-100 ppm 2,3,7,8-tetrachlorodibenzo-p-dioxin was incubated for one year in loamy sand or silty clay loam. It would appear that 2,3,7,8-tetrachlorodibenza-p-dioxin could build up in soil if 2,4,5-T containing trace amounts of 2,3,7,8-tetrachlorodibenzo-p-dioxin were disposed by land burial. In summary, no practical chemical detoxification procedures are now available for waste 2,4,5-T. The photochemical degradation to remove traces of 2,3,7,8-tetrachlorodibenzo-p- dioxin is an interesting approach for spill clean-up but not for disposal.2,4,5-T (Weedon TM) 20% active ingredient was incinerated in a municipal multiple hearth sewage sludge incinerator with a temperature range of 457-940 °C with 6-10% excess air, the destruction efficiency was 99.980-99.996%. /From table, residence time not specified/Group I Containers: Combustible containers from organic or metallo-organic pesticides (except organic mercury, lead, cadmium, or arsenic compounds) should be disposed of in pesticide incinerators or in specified landfill sites. /Organic or metallo-organic pesticides/For more Disposal Methods (Complete) data for 2,4,5-T (8 total), please visit the HSDB record page. |
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