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Sultan Qaboos University (2016)

Assessing boron sources and spatial distribution in tertiary aquifers from central Oman

Al-Battashi, Hamed Hamood.

Titre : Assessing boron sources and spatial distribution in tertiary aquifers from central Oman

Auteur : Al-Battashi, Hamed Hamood.

Université de soutenance : Sultan Qaboos University

Grade : Master of Science (MS) in Environmental Science 2016

Résumé partiel
Groundwater is the main source of water in arid areas and the increased demand for domestic water is putting this source under serious threats. Boron is one of the elements which determine the water quality in arid areas and high concentration of boron can cause serious health and environmental issues. In most studies the volcanic activity and seawater intrusion are the main sources of elevated boron in groundwater. The recent development in oil production in several desert areas of Oman has increased the demand of water for oil operations and human consumption. Drilling of the wells revealed that aquifers exhibited high concentration of boron which in many cases exceeds the WHO limits for drinking water (2.4 mg 1). The existing study is aiming to establish the relative distribution of boron in different aquifers from central Oman and identifying what are the natural sources of the elevated concentration of boron in water. More than 800 water samples data from Petroleum Development Oman (PDO) were analyzed statistically using principle component analysis (PCA), cluster analysis (CA) and inverse distant weight (IDW). The analysis show that more than 40% of the water samples exhibit higher boron concentration than the world health organization (WHO) limit and boron is correlated with solutes like Ca, Mg, Na, K and Li. The geological formations which show high boron are Fars and UeR while Rus and Dammam exhibit lower boron concentration. Northern and central areas exhibit high boron concentration than the southern area. Solid samples were collected from the four formations and tested in the lab in batch and column experiment. The results were closer to the findings from the statistical analysis except that the Rus formation was releasing more boron than all formations.

Présentation (SHUAA)

Annonce (Almandumah)

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