Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Accueil du site → Doctorat → Allemagne → 2017 → Environmental impact assessment on oil shale extraction in Central Jordan

Technische Universität Bergakademie Freiberg (2017)

Environmental impact assessment on oil shale extraction in Central Jordan

Gharaibeh, Ahmed

Titre : Environmental impact assessment on oil shale extraction in Central Jordan

Auteur : Gharaibeh, Ahmed

Université de soutenance : Technische Universität Bergakademie Freiberg

Grade : Doctor rerum naturalium 2017

Résumé partiel
This study focuses on the environmental impact assessment of trace elements concentrations in spent shale, which is the main residual besides gas and steam from the utilization of oil shale. The study area El-Lajjun covers 28 km2, located in the centre of Jordan approximately 110 km south of Amman. It belongs mainly to the Wadi Mujib catchment and is considered to be one of the most important catchments in Jordan. The Wadi El-Lajjun catchment area (370 km2) consists of two main aquifer systems : The intermediate aquifer (Amman Wadi As Sir Aquifer or B2/A7) and the deep sandstone aquifer (Kurnub/Ram Group Aquifer). The B2/A7 aquifer (Upper Cretaceous) is considered as the main source of fresh water in Jordan. El-Lajjun oil shale was deposited in a sedimentary basin and comprises massive beds of brown-black, kerogen-rich, bituminous chalky marl. The oil shale was deposited in shallow marine environment. It is by definition a sedimentary rock containing organic material in the rock matrix. The shale oil extraction is an industrial process to decompose oil shale and to convert the kerogen into shale oil by hydrogenation, pyrolysis or by a thermal dissolution. Several classifications of extraction technologies are known ; the classification with respect to the location where the extraction takes place distinguishes between off-site, on-site, and in situ. The oil shale utilization may have serious repercussions on the surrounding environment if these issues are not investigated and evaluated carefully. Ten representative oil shale rock samples with a total weight about 20 kg were collected from different localities of oil shale exposures in the study area. A standardized laboratory Fischer Assay test was performed with the samples to determine oil shale characteristics and to obtain spent shale, which was used in this study for further investigations. Sequential extraction was used to evaluate the changes in the mobility and distribution of the trace elements : Ti, V Cr, Co, Zn, As Zr, Cd, Pb and U. Column leaching experiments were performed to simulate the leaching behavior of the above elements from oil shale and spent shale to evaluate the possible influence on the groundwater in the study area. The concentrations in the leachate were below the maximum contaminant levels of the Environmental Protection Agency (EPA) for drinking water and the Jordanian standards for drinking water.

Mots clés  : Jordan, oil shale, environmental impact assessment, trace elements, groundwater - Jordanien, Ölschiefer, Umweltverträglichkeitsprüfung, Spurenelemente, Grundwasser -

Présentation (QUCOSA)

Version intégrale (10,57 Mb)

Page publiée le 9 novembre 2017, mise à jour le 16 janvier 2020