Persistence of Oil - MPCD - BIOSINFO

We propose to clean the areas, the sand and the vegetation "In Site" with Biodegradable Chemicals MPCD and Biological Acceptable Products BIOSINFO that are Environmentally Friendly to accelerate the process of Biodegradation. To do that we need heavy machinery to mix the products with the soil and sand and a lot of hand labor "In Site".

The concept of persistence in relation to oil spills probably originated after the TORREY CANYON incident in 1967. This is the time when discussions first arose regarding various new measures to protect the marine environment and to manage marine oil spills, particularly in relation to liability and compensation. Generally, persistent oils contain a considerable proportion of heavy fractions or high-boiling material.  They do not dissipate quickly and will therefore pose a potential threat to natural resources when released to the environment.  Such threats are evident in terms of impacts to wildlife, smothering of habitats and oiling of amenity beaches.  In contrast, non-persistent oils are generally of a volatile nature and are composed of lighter hydrocarbon fractions.  When released into the environment they will dissipate rapidly through evaporation. As a result, spills of these oils rarely require a response but when they do, clean-up methods tend to be limited. Impacts from non-persistent oils may include, for example, effects on paint coatings in marinas and harbours and - at high concentrations - acute toxicity to marine organisms.

 The international compensation regime for oil spills only applies to spills of “persistent” oil. Whilst this term is not precisely defined in any of the conventions, the International Oil Pollution Compensation Funds (IOPC Funds) have developed guidelines which are widely accepted.  Under these guidelines an oil is considered non-persistent if at the time of shipment at least 50% of the hydrocarbon fractions, by volume, distil at a temperature of 340°C (645°F) and at least 95% of the hydrocarbon fractions, by volume, distil at a temperature of 370°C (700°F) when tested in accordance with the American Society for Testing and Materials (ASTM) Method D86/78 or any subsequent revision thereof.

However, this definition is based on distillation characteristics of oils under standard laboratory conditions. It may not, therefore, fully reflect the behaviour of oil in the environment, where factors such as burial in sediments can lead to the long-term persistence of oils that would normally be defined as non persistent.

Oils which are normally classified as persistent include crude oils, fuel oils, heavy diesel and lubricating oils.  Non-persistent oils include gasoline, light diesel oil and kerosene. 


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