مشروع البحث: Assessment and Management of petrroleum Hydrocarbon Contaminated Sites in Libya
تحميل...
المساهمين
الممولين
رقم التعريف
7002
الباحث
رماح الامين عبد الرحمن احمد
الوصف
In Libya, as in many others of countries, petroleum hydrocarbon contamination is widespread. Contamination results from mishandling, spilling, or leaking products, including gasoline, motor and lubricating oils, diesel fuel and aircraft fuels. Each of these petroleum products are complex mixtures containing hundreds to thousands of different chemical compounds. Various petroleum products may also contain additives. The diverse chemical compounds exhibit a large range of behavior in environmental media governed by their physicochemical properties. As a result of these characteristics, the assessment of risk from exposure to petroleum hydrocarbon mixtures is difficult. In the environment these mixtures can change through weathering (that may include volatilization, biodegradation, partitioning, oxidation, photo-
degradation, etc.), further complicating the determination of risk from exposure. The more soluble or volatile compounds will migrate to other locations, while the non-
mobile components are left behind at the release site. As a result, the receptors can be exposed to a different mixture than that originally released to the environment. Factors including location of release, length of time between the release and exposure, media of exposure, etc. can all contribute to these differences. Following the identification of a release or suspected release on a site, a site assessment is conducted to identify the nature and extent of contamination, potential sources, sensitive receptors, and migration pathways. A well-designed and implemented site assessment provides a sound basis for risk characterization and subsequent remediation. This Thesis “Assessment and Management of Petroleum Hydrocarbon Contaminated Sites in Libya” highlights some of the most common methods and approaches used in the assessment and management of petroleum hydrocarbon release sites, and presents case study that demonstrate how these technologies have been applied effectively at Site. The study area is an “Oil
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Terminal” that has stored, handled and distributed petroleum products. The investigations carried out inside the study area revealed that, the area is affected by three different types of pollutants caused by mishandling, spills and leakage of hydrocarbon products; (1) in the subsoil near the water table; (2) light nonaqueous phase liquid (LNAPL) on the groundwater surface as free product; and (3) dissolved in groundwater. Chemical analyses of samples have provided precise information about the existing pollutants in the soil and groundwater. Results show that concentrations of the hydrocarbon in the soil and groundwater is of three order of magnitude higher than the acceptable limits that are set for industrial areas (750 ppm, for the soil and 350 ppb, for water) according to European Union norm and the regulation of D.M. 741/99).
الكلمات الدالة
Assessment and Management of petrroleum Hydrocarbon Contaminated Sites in Libya