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نویسندگان مقالات پربازدید :
مجله مهندسی شیمی
جزئیات رویداد
همایش ، رویداد ، ژورنال
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  • methods of using carbon nanotubes as filter media to remove aqueous heavy metals

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    • تاریخ ارائه: 1392/01/01
    • تاریخ انتشار در تی پی بین: 1392/01/01
    • تعداد بازدید: 520
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     although carbon nanotubes (cnts) are well known to have a strong affinity to various heavy metals in aqueous solution, little research has been dedicated to exploit their use in fixed-bed water treatment systems (e.g., trickling filters). in this work, batch sorption and fixed-bed experiments were conducted to examine the ability of functionalized multi-walled cnts as filter media to remove two heavy metal ions (pb2+ and cu2+) from infiltrating water. batch sorption experiments confirmed the strong sorption affinity of the cnts for pb2+ and cu2+ in both single and dual metal solution systems. in addition, sonication-promoted dispersion of the cnt particles enhanced their heavy metal sorption capacity by 23.9–32.2%. for column experiments, laboratory-scale fixed-bed columns were packed with cnts and natural quartz sand by three different packing: layered, mixed, and deposited. while all the three packing methods enhanced the fixed-bed filtering efficiency of pb2+ and cu2+ from single and dual metal systems, the cnt-deposited packing method was superior. although the amount of the cnts added into the fixed-bed columns was only 0.006% (w/w) of the sand, they significantly improved the fixed-bed’s filtering efficiency of pb2+ and cu2+ by 55–75% and 31–57%, respectively. findings from this study demonstrate that functionalized multi-walled cnts, together with natural sand, can be used to effectively and safely remove heavy metals from water.

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