Abstract




 
   

IJE TRANSACTIONS B: Applications - Special Issue - Sustainable Technologies for Water and Environment; Guest Editor Prof. Dr. Ahmad Fauzi Ismail and Associate Guest Editor Dr. Lau Woei Jye, Universiti Teknologi Malaysia (UTM), Malaysia
Vol. 31, No. 8 (August 2018) 1334-1340    Article in Press

PDF URL: http://www.ije.ir/Vol31/No8/B/23-2795.pdf  
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  COMPARATIVE STUDIES ON ULTRASOUND PRE-TREATED PEANUT HUSK POWDER AND ULTRASOUND SIMULTANEOUS PROCESS ON HEAVY METAL ADSORPTION
 
low suk khe Low, M. C. Tan, N. L. Chin and K. W. Tan
 
( Received: December 14, 2017 – Accepted: March 21, 2018 )
 
 

Abstract    The removal of copper (II) ion by using ultrasound pre-treatment to increase the pores structure and surface area on peanut husk powder via direct sonication (ultrasound probe) and indirect ultrasound (ultrasound bath) at powder level 3.5 W. In previous studies, researchers had applied ultrasound simultaneous with adsorption process. This method is not suitable to treat huge amount of heavy metal in wastewater effluent. In this study, the percentage removal of copper (II) ion and adsorption capacity of direct and indirect ultrasound pre-treated peanut husk powder were compared with untreated peanut husk powder and simultaneous ultrasound adsorption process. The peanut husk powder was characterized by scanning electron microscope (SEM). The effect of variables such as different initial concentration (10-50 mg/L), contact time (0.5–3 h), pH (2–8), and dosage (0.1–0.3 g) were evaluated. 3 h adsorption equilibrium time was required for adsorption of copper (II) ion onto peanut husk surface. The indirect ultrasound pre-treated peanut husk powder has achieved the highest copper (II) ion percentage removal of 99.79% at pH 6 and 0.3 g dosage. It was 57.07% and 19.63% higher than untreated peanut husk powder and simultaneous ultrasound respectively. Both ultrasound pre-treated peanut husk powder shown significant improvement on copper (II) ion removal compared to untreated peanut husk powder and simultaneous ultrasound.

 

Keywords    Ultrasound, Adsorption, Copper (II) ion, Peanut Husk Powder

 

چکیده    جداسازی یون مس (II) از طریق جذب سطحی بر روی پودر پوسته بادام زمینی را می توان با پیش فراوری به روش پیش تیمار فراصوت افزایش داد. ساختار متخلل و سطح تماس پودر پوسته بادام زمینی از طریق پیش تیمار مستقیم ( میله فراصوت) و پیش تیمار غیر مستقیم ( حمام فراصوت) بهبود داده می شود. در مطالعات قبلی، محققان استفاده همزمان فرآیند جذب سطحی و پیش تیمار فراصوت را به کار برده اند. هرچند، این روش برای فراوری مقادیر زیاد فلزات سنگین در فاضلاب مناسب نمی باشد. در تحقیق پیش رو، جداسازی یون مس (II) از طریق جذب سطحی با استفاده از پودر پوسته بادام زمینی پیش فراوری شده به روش پیش تیمار فراصوت مستقیم و غیر مستقیم با پودر پوست بادام زمینی فراوری نشده به عنوان جاذب و فرایند جذب سطحی و پیش تیمار فراصوت همزمان مقایسه شده است. مشخصات پودر پوست بادام زمینی به کمک میکروسکوپ الکترونی (SEM) تعیین گردیده است. در این تحقیق تاثیر متغییرهایی نظیر غلظت اولیه یون مس (II) (10-50 میلی گرم/لیتر)، زمان تماس (0.5-3 ساعت)، pH (8-2) و دوز جاذب (0.3-0.1 گرم) بر روی فرآیند جذب سطحی ارزیابی گردیده است. نتایج حاکی از آن است که 3 ساعت زمان تماس برای جذب تعادلی یون مس بر روی پودر پوست بادام مورد نیاز بوده است. همچنین بالاترین میزان جذب یون مس (II) به مقدار 99.79 درصد در pH 6 و دوز 0.3 گرم با استفاده از پودر پوست بادام زمینی پیش فراوری شده به روش پیش تیمار فراصوت غیر مستقیم به دست آمده است. این مقدار به ترتیب 57.07 درصد و 19.63 درصد بیشتر از جاذب فراوردی نشده و فرایند همزمان جذب و پیش تیمار بوده است. هر دو جاذب پیش فرآوری شده به روش آوادهی فراصوت بهبود قابل توجهی برای جذب یون مس (II) نسبت به جاذب فراوری نشده و فرآیند جذب سطحی و پیش تیمار فراصوت همزمان نشان داده اند.

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