شیمى کاربردى روز

شیمى کاربردى روز

حذف آرسنیک از فاضلاب مصنوعی با استفاده از UiO-66 و مقایسه آن با سایر جاذب ها

نوع مقاله : مقاله علمی پژوهشی

نویسندگان
1 دانشکده مهندسی شیمی، گاز و نفت، دانشگاه سمنان، سمنان، ایران
2 شرکت نانو ترکیب سمن دارا، سمنان، ایران
چکیده
در این مطالعه، چارچوب آلی فلزی UiO-66 برای کاربرد جذب آرسنیک برای حذف آرسنیک سنتز شد. نمونه جاذب قبل و بعد از جذب با XRD و BET آنالیز شد. در تجزیه و تحلیل XRD از جاذب سنتز شده UiO-66، پیک های مشخصه قوی نشان داد که ناخالصی در ساختار بلوری نمونه دیده نمی شود و تجزیه و تحلیل BET مساحت ویژه آن را برابر با 712.45 متر مربع بر گرم اندازه گیری کرد. حذف از نمونه فاضلاب مصنوعی با استفاده از UiO-66، زئولیت طبیعی تیمار شده با اسید و باز و جاذب اکسید فلزی SiO2 انجام شد. نتایج نشان داد که UiO-66 و زئولیت اسید واش شده به ترتیب بالاترین راندمان حذف را در مقایسه با سایر جاذب های نانو دارند. محققان چگونگی تاثیر عوامل مختلف بر حذف آرسنیک را با استفاده از جاذب به نام UiO-66 بررسی کردند. آنها از نرم افزاری برای طراحی آزمایش هایی استفاده کردند که اثرات pH، دما و مقدار UiO-66 مورد استفاده را آزمایش می کرد. بهترین شرایط برای حذف آرسنیک pH 9، دمای 25 درجه سانتیگراد و 0.5 گرم UiO-66 در لیتر بود. تحت این شرایط، حداکثر حذف آرسنیک 62.16٪، با ظرفیت جذب 10.98 میلی گرم آرسنیک در هر گرم UiO-66 بود. محققان همچنین سرعت جذب آرسنیک را بررسی کردند و دریافتند که این فرآیند با دو مدل مختلف مطابقت دارد. در نهایت، آنها UiO-66 را با یک زئولیت جاذب و اسید شسته دیگر مقایسه کردند و دریافتند که UiO-66 در همه موارد آرسنیک بیشتری حذف می کند.
کلیدواژه‌ها
موضوعات

عنوان مقاله English

Arsenic Removal from Synthetic Wastewater Using UiO-66 and comparing it with Other Adsorbents

نویسندگان English

Ghazal Miri 1
Saeideh Hematian 1
Maryam Daraee 2
Kiana Peyvandi 1
1 Faculty of Chemical, Gas and Petroleum Engineering, Semnan University, Semnan, Iran
2 Nano Compound, Seman Dara Company, Semnan, Iran
چکیده English

The occurrence of arsenic in the surface and groundwater resources threatens human health in time of exposure to people for drinking water, or other applications. In this study, metal organic framework of UiO-66 was synthesized to use for arsenic removal adsorption application. The adsorbent sample was analyzed with XRD & BET before and after removal adsorption. In the XRD analysis of the synthesized UiO-66 adsorbent, strong characteristic peaks indicated that impurities are not seen in the sample crystal structure, and the BET analysis measured its specific area equal to 712.45 m2/g. The removal of from the synthetic wastewater sample was carried out using UiO-66, natural zeolite treated with acid and base and metal oxide SiO2 adsorbents. By comparing the sorbents in equal operating conditions, the results showed that UiO-66 and acid-washed zeolite respectively have the highest removal efficiency compared to other nano sorbents. Researchers investigated how different factors affected the removal of arsenic using an absorbent called UiO-66. They used software to design experiments that tested the effects of pH, temperature, and the amount of UiO-66 used. The best conditions for arsenic removal were found to be a pH of 9, a temperature of 25°C, and 0.5 grams of UiO-66 per liter. Under these conditions, the maximum arsenic removal was 62.16%, with an adsorption capacity of 10.98 milligrams of arsenic per gram of UiO-66. The researchers also studied how quickly the arsenic was absorbed and found that the process fit two different models. Finally, they compared UiO-66 to another absorbent, acid-washed zeolite, and found that UiO-66 removed more arsenic in all cases.

کلیدواژه‌ها English

Adsorption
arsenic removal
Metal organic framework
Modified zeolite
UiO-66
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