Loam, Hagerstown silty clay

Norfolk sandy loam Lakeland sandy loam Hagerstown silty clay loam Barnes clay loam Celeryville muck... 

Figure 2. Persistence of TCDD in Hagerstown silty clay loam at 1, 10, 100 ppm and sampled after 20, 40, 80, 160, and 350 days...

Experiments involving the release of radioactive carbon dioxide from MSMA-14C treated soils were conducted in a system consisting of two test tubes connected in series. One tube contained 5g of treated soil (at 10 and lOOppm of monosodium methane arsenic acid carbon dioxide while a second tube contained a trapping mixture, 2-methoxyethanol and monoethanolamine (7-10, v/v). Carbon dioxide-free air was passed over the soil and metabolic 14CO was collected in the trapping solution. The soils studied were Sharkey cldy, Hagerstown silty clay loam, Cecil sandy loam, and Dundee silty clay loam. All soils were initially adjusted to field capacity and maintained at 28-30°C the evolved 14CO was sampled periodically. Some properties of these soils are shown in Tabfe 13.1. 

CASRN 61-82-5 molecular formula C2H4N4 FW 84.08 Soil When radiolabeled amitrole-5- C was incubated in a Hagerstown silty clay loam, 50 and 70% of the applied amount evolved as C02 after 3 and 20 d, respectively. In autoclaved soil, however, no C02 was detected. The chemical degradation in soil was probably via hydroxyl radicals (Kaufman et al, 1968). 

In the laboratory, half-lives ranged from 213-699 and 435-535 d at application rates of 60 and 10 kg/ha, respectively (Beck and Hansen, 1974). In anaerobic soils, the half-life of pentachloronitrobenzene was 21 d. After 3 wk of incubation, <1% of the applied amount (10 mg/g soil) remained in submerged soil but 82% was found in moist soil (Ko and Farley, 1969). In a Hagerstown silty clay loam, pentachloroaniline, pentachlorothioanisole, and pentachlorophenol were reported as metabolites (Murthy and Kaufman, 1978). 

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