Abstract




 
   

IJE TRANSACTIONS C: Aspects Vol. 27, No. 9 (September 2014) 1415-1422    Article Under Proof

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  SYNTHESIS OF ETHYLENEDIAMINE-MODIFIED ORDERED MESOPOROUS CARBON AS A NEW NANOPOROUS ADSORBENT FOR REMOVAL OF CU(II) AND PB(II) IONS FROM AQUEOUS MEDIA
 
M. Anbia and A. H. Davijani
 
( Received: January 09, 2014 – Accepted: May 22, 2014 )
 
 

Abstract    The mesoporous carbon (CMK-3) functionalized with ethylenediamine (EDA) has been synthesized (CMK-3-EDA) and applied as a new mesoporous adsorbent for removal of Cu(II) and Pb(II) cations from aqueous solutions. Nitrogen adsorption–desorption measurements (BET) show that surface area, pore size and pore volume of CMK-3 were significantly changed after amine modification. The BET surface area and pore diameter of functionalized product were 344.74 m2 .g−1 and 28.61Å, respectively. The adsorption conditions including contact time, pH value and adsorbent dosage of the sample solution were investigated in batch system and then determined by means of flam atomic absorption spectroscopy. Under experimental conditions, the adsorption capacity was 188.2 mg. g−1 and 196.64 mg. g−1 for Cu(II) and Pb(II) ions, respectively. The obtained high adsorption capacity of CMK-3 functionalized with EDA is due to the amine functional groups formed on the surface of CMK-3 which can react with Pb(II) and Cu(II) ions. Results show that the new synthesized porous material is a highly effective material for sorption of Pb(II) and Cu(II) ions in comparison to other adsorbents.

 

Keywords    Mesoporous carbon; CMK-3-EDA; Adsorption capacity; Batch system.

 

چکیده    مزوپروس کربن ( (CMK-3عاملدار شده با اتیلن دی آمین سنتز گردید و به عنوان یک جاذب جدید برای حذف سرب و مس از محلول های ابی بکار برده شد. دستگاه جذب و واجذب نیتروژن (BET) نشان می دهد که مساحت سطح و سایز حفرات CMK-3 بعد از عاملدار شدن تغییر قابل توجهی کرده است. مساحت سطح و سایز حفرات محصول عاملدار شده به ترتیب m2 .g−1 344.74 و Å 28.61 بود. شرایط موثر بر جذب شامل زمان تعادل، مقدار PHو مقدار جاذب، محلول نمونه در سیستم بچ بررسی گردید و سپس بوسیله اسپکتروسکوپی جذب اتمی شناسایی شد. تحت شرایط تجربی، ظرفیت جذب برای سرب و مس به ترتیبmg. g−1 196.64 و mg. g−1188.2 بود. ظرفیت جذب بالا در CMK-3 عاملدار شده با اتیلن دی امین ناشی از گروه های عاملی امینی تشکیل شده بر سطح CMK-3 می باشد که می تواند با یون های مس و سرب برهمکنش داشته باشند. نتایج نشان می دهد که ماده متخلخل جدید سنتز شده ماده ای با کارایی بالا برای جذب سرب و مس در مقایسه با دیگر جاذب ها می باشد.

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