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اوزون معلومات علمية، معلومات ثقافية

ما هو الأوزون؟

01 ديسمبر 2013

أوزون (Ozone)

جزيء يحتوي على ثلاث ذرات أكسجين ، صيغته O3 ، وينتج في طبقات الجو العليا بتأثير الأشعة فوق البنفسجية أو البرق على الأكسجين O2 .

وهو غاز ذو لون ازرق يتكون من ثلاث ذرات من الأكسجين صيغته الكيميائية O3، ونسبته في الغلاف الجوى ضئيلة قد لا تتجاوز في بعض المناطق واحد في المليون، وهو غاز سام.

تكمن أهمية الأوزون في طبقات الجو العليا (طبقة الستراتوسفير) في حماية الجسم من الأشعة البنفسجية المسببة للسرطان وبخاصة سرطان الجلد، ويستخدم الأوزون في تعقيم المياه نظراً لقدرته على قتل الجراثيم

على العكس من طبقات الجو العليا فان تواجد الاوزون في طبقات الجو السفلى يسبب اضرار كبيرة. فاستنشاق جزء يسير من الاوزون مع الهواء يسبب صداع واثار صحية غير محمودة. كما أنه يؤثر على الريئتين ويضعف مقاومتها للبكتريا وقد يسبب تحطما للخلايا. كما أنه يدمر المطاط والبوليمرات ويجعل عمرها أقصر وخصوصا اطارات السيارات. والسبب الرئيسي لتكون الاوزون في الطبقات السفلى هو عادم السيارات وادخنة المصانع.

اوزون معلومات علمية، معلومات ثقافية

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