Diamond from shocked magnesite

✍ Scribed by T. Sekine

• Publisher: Springer
• Year: 1988
• Tongue: English
• Weight: 286 KB
• Volume: 75
• Category: Article
• ISSN: 0028-1042
• DOI: 10.1007/bf00364029

✦ Synopsis

to the total organic carbon in the soil, and therefore no decrease of the latter could be detected. Our results suggest that accumulation of LAS, NP, NP1EO, and NP2EO, as well as PCB, is occurring in sludgeamended soils. A number of scenarios can be suggested. The environmentally best-case situation is that the observed residuals are threshold concentrations for biological transformation. These residuals will not increase with additional sludge applications. The environmentally worst-case scenario would be increased concentrations with each addition of sludge. Assuming yearly soil application rates of 13.5 t per ha per year (d.w.) of sludge with the same chemical concentrations (Table 1) and similar disappearance behavior, there would be a continuous increase in the residuals of LAS, NP, and PCB at the rate of 0.5, 0.045, and 0.018 mg kg -1 per year, respectively. Further investigations are needed to evaluate if such residual soil concentrations of LAS, NP, NP1EO, and NP2EO are of environmental concern. Entrance and behavior in the food chain through soil ingestion by animals and leaching into the groundwater are examples of such concerns.