ارتقای ایمنی و پیشگیری از مصدومیت ها

چکیده

سابقه و هدف: وجود آرسنيک در آب زيرزميني سلامت مصرف‌کنندگان آب آشاميدني را در معرض خطر قرار مي‌دهد. با توجه به کمبود منابع آب آشاميدني در ايران، لزوم رساندن آرسنيک به ميزان مجاز آن ضروري مي‌باشد. هدف اين مطالعه، بررسي کارايي زئوليت کلينوپتيلوليت اصلاح‌شده با اکسيد منگنز در حذف آرسنيک از منابع آب بود.

روش بررسي: براي اصلاح جاذب کلينوپتيلولايت از پرمنگنات پتاسيم استفاده گرديد. متغيرهاي موردبررسي در اين مطالعه زمان تعادل، pH، اندازه ذرات جاذب، غلظت اوليه آرسنيک بود. براي جاذب اصلاح‌شده ظرفيت تبادل کاتيوني، ظرفيت تبادل کاتيوني خارجي و اندازه گيري سطح ويژه با روش متيلن بلو انجام گرديد.

يافته‌ها: آناليز ساختاري XRD نشان مي‌دهد که جاذب کلينوپتيلولايت مورداستفاده از 70 درصد کلينوپتيلولايت، 3 درصد رامسديلايت، 8 درصد اکسيد سيليکون و 19 درصد سيليکات آلومينيم پتاسيم تشکيل‌شده است. نتايج نشان مي‌دهد که زئوليت خام و اصلاح‌شده به ترتيب داراي ظرفيت تبادل کاتيوني 57/5 و 64/7 ميلي اکي والان به ازاي هر گرم است. سنت يک جذب آرسنيک بر روي جاذب از مدل سنتيکي شبه درجه‌دو پيروي مي‌کند و نشان مي‌دهد که جذب آرسنيک بر روي جاذب به‌صورت فرايند جذب شيميايي است.

نتيجه‌گيري: نتايج مطالعه حاضر نشان مي‌دهد که جاذب اصلاح‌شده کلينوپتيلولايت با پرمنگنات پتاسيم مي‌تواند يک روش مؤثر و ارزان‌قيمت براي حذف آلاينده‌هاي مختلف زيست‌محيطي باشد.

 واژگان کلیدی: آرسنيک، کلينوپتيلولايت، جذب سطحي، آب زيرزميني

How to cite this article: Massoudinejad M, Ghaderpoori M .Evaluate the performance of modified zeolite with Mgo for removal of arsenic from water resources. J Saf Promot Inj Prev. 2016; 4(3): 151-60.

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