Major Ion and Rare Earth Element Concentrations in Rainwaters from Ajdabiya, Benghazi and Al Marj, NE Libya: Natural and Anthropogenic Sources
الكلمات المفتاحية:
Rainwater، Rare earth elements، Major ions، natural source، anthropogenic source، Ajdabiya، Benghazi، Al Marj، NE Libyaالملخص
تهدف الدراسة إلى معرفة تركيز الايونات الرئيسية والعناصر الارضية النادرة في مياه الامطار من ثلاثة مدن ليبية هي بنغازي واجدابيا والمرج وبالتالي معرفة مصادر هذه العناصر.
من خلال الدراسة نجد أن الايونات الرئيسية اتية من ثلاثة مصادر مختلفة هي القارة والمحيط والصناعة. تحتوى مياه الامطار في بنغازي واجدابيا والمرج تحتوى على نسبة كبيرة من ايونات الكبريتات والنترات تحتوى مياه الامطار المدروسة على نسب مختلفة من العناصر الارضية النادرة, حيث تحتوى عينات مياه الامطار في بنغازي واجدابيا على نسبة كبيرة من العناصر الارضية النادرة الخفيفة أكثر من عينات المرج. هذه النسبة الكبيرة من العناصر الارضية النادرة الخفيفة في بنغازي واجدابيا يدل على أن مصدرها ليس طبيعي بل صناعي نسبة الايتيريوم إلى الهولميوم في كل العينات المدروسة أكبر من متوسط القشرة الارضية ولكن أقل من متوسط مياه البحر. نسبة الايتيريوم إلى الهولميوم بزيادة نسبة العناصر الارضية النادرة الخفيفة.
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