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ششمین کنفرانس هیدرولیک ایران
جزئیات رویداد
همایش ، رویداد ، ژورنال
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  • study of nitrate adsorption process on red mud; an emerging adsorbent obtained from industrial waste

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    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 837
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     red mud (rm) is a solid industrial waste remains from bayer's process to produce of alumina from bauxite ore. annually, about 60 million tons of rm is produced all over the world that may cause serious danger for environment (due to its high alkalinity). rm has found many applications in science and industry e.g. production of color bricks, ceramics, cement, and adsorbents. application of rm for environmental friendly purposes e. g. removal of heavy metal ions, inorganic anions, organics, dyes and pathogens from aqueous solution, have been widely developed recently. in this paper, process of nitrate adsorption on surface of rm adsorbent is discussed. laboratory batch experiments conducted to study removal behavior of adsorbent under different ph solution conditions. the results show that increasing or decreasing in ph of solution, may result in reduced nitrate removal capacity. optimum ph of adsorption was in range of natural water (ph=6.5). ft-ir test also implemented to investigate characteristics of rm adsorbent (before and after adsorption process). it shows that adsorption process obeys both physical and chemical procedure. finally, ligandexchange process on hydroxylated surface is supposed as the main process of nitrate ion adsorption on rm.

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