مقایسه حذف آرسنیک آب توسط نانوذرات مگنتیت و اکسید تیتانیوم، آلیاژ فروسیلیس و فروسیلیس‌ منیزیم

نوع مقاله: مقاله پژوهشی

نویسندگان

1 گروه علوم و مهندسی خاک، دانشکده کشاورزی، دانشگاه زنجان، زنجان، ایران.

2 گروه علوم و مهندسی خاک، دانشکده کشاورزی، دانشگاه زنجان، زنجان، ایران

3 گروه شیمی تجزیه ، دانشکده علوم، دانشگاه زنجان، زنجان، ایران.

چکیده

شبه فلز آرسنیک، یک آلاینده سمی و دارای اثرات سرطان­زایی شدیدی است. یکی از راه‌های جدید و موثر برای کاهش غلظت آرسنیک درآب‌های آلوده، استفاده از اصلاح­کننده‌های معدنی است. هدف از این مقاله بررسی میزان کاهش آرسنیک در آب با استفاده از نانوذرات مگنتیت، نانوذرات تیتانیوم، فروسیلیس و فروسیلیس‌منیزیم است. در این تحقیق اثر زمان، غلظت اولیه آرسنیک، مقدار جاذب و pH با انجام آزمایش­های ناپیوسته بر تغییر غلظت آرسنیک محلول مطالعه شد. پس از تعیین زمان تعادل، مقدار بهینه جاذب‌ها به دست آمد و ایزوترم‌های جذب سطحی رسم شد. زمان تعادل برای نانوذرات مگنتیت و تیتانیوم دو ساعت، برای فروسیلیس‌منیزیم 16 ساعت و برای فروسیلیس 24 ساعت به‌دست آمد. ایزوترم‌ فرندلیچ با داده­های آزمایش همبستگی بیشتری نشان داد (R2≥089). با افزایش pH درصد حذف آرسنیک کاهش یافت و حداکثر حذف (90 درصد) توسط نانو ذرات آهن و تیتانیوم در 3=pH مشاهده شد. نانوذرات مگنتیت و نانوذرات اکسید تیتانیوم جاذب‌های کاراتر و فروسیلیس ‌منیزیم جاذب‌های ارزان قیمت‌تری برای حذف آرسنیک از آب آلوده بودند.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Comparison of Arsenic Removal from Water by Magnetite and Titanium Oxide Nanoparticles, Ferrosilicon and Ferrosilicon Magnesium

نویسندگان [English]

  • mohammad babaakbari 1
  • shahrbanoo hasani 2
  • Mohammad Amir Delavar 1
  • mahmodreza neyestani 3
1 Department of Soil Science, College of Agriculture, University of Zanjan, Zanjan, Iran
2 Department of Soil Science, College of Agriculture, University of Zanjan, , Zanjan Iran.
3 Department of Analytical Chemistry, College of Science, University of Zanjan, , Zanjan Iran.
چکیده [English]

Arsenic metalloid is a toxic contaminant and has a high carcinogenic effect. One of the new and effective methods to reduce the concentration of arsenic in contaminated water is to use mineral amendments. The purpose of this research is to investigate the reduction rate of arsenic in water using magnetite nanoparticles, titanium nanoparticles, ferrosilicon and magnesium ferrosilicon. In this study, the effect of time, initial concentration of arsenic, the amount of adsorbent and pH on variation of arsenic concentrations of solutions were studied by performing batch experiments. The equilibrium time, the optimum amount of adsorbents and the most suitable adsorbent were determined and the adsorption isotherms were plotted. The equilibrium time was two hours for magnetite nanoparticles and titanium nanoparticles, 16 hours for magnesium ferrosilicon, and 24 hours for ferrosilicon. Freundlich isotherm showed greater correlation with test data (R2≥089). With increasing pH, the percentage of arsenic removal decreased and maximum removal (90%) was observed by iron nanoparticles and titanium at pH = 3. Magnetite nanoparticles and titanium oxide nanoparticles were more efficient adsorbent. Ferrosilicon and magnesium ferrosilicon were cheaper adsorbents for removal of arsenic from water.

کلیدواژه‌ها [English]

  • "Arsenic"
  • "Adsorption isotherm"
  • "Ferrosilicon"
  • "Magnetite nanoparticles"
  • "titanium nanoparticles"
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