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سنتز بیونانوکامپوزیت مغناطیسی Fe3O4@SiO2@CS با استفاده از سیلیس استخراج شده از کلش گندم جهت حذف رنگ بازیک قرمز 46 از محلولهای آبی | ||
| نشریه مهندسی عمران امیرکبیر | ||
| مقاله 8، دوره 53، شماره 6، شهریور 1400، صفحه 2353-2370 اصل مقاله (2.64 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22060/ceej.2020.17391.6548 | ||
| نویسندگان | ||
| الهام نجفی1؛ افسانه شهبازی* 2؛ سوران کمری3 | ||
| 1دانشجوی کارشناسی ارشد علوم و مهندسی محیط زیست، پژوهشکده علوم محیطی، دانشگاه شهید بهشتی، تهران، ایران، | ||
| 2عضو هیات علمی دانشگاه شهید بهشتی | ||
| 3دانشجوی دکتری آلودگیهای محیط زیست، پژوهشکده علوم محیطی، دانشگاه شهید بهشتی، تهران، ایران، | ||
| چکیده | ||
| کلش گندم به عنوان یک پسماند کشاورزی کم ارزش حاصل از فرآیند برداشت و عملآوری گندم از مزارع شناخته میشود که سرشار از سیلیس بیشکل میباشد که فرآیند استخراج آن ساده بوده و نیاز به مواد شیمیایی و تجهیزات پیچیدهای ندارد و میتواند به عنوان یک ماده اولیه ارزان قیمت و در دسترس جهت تولید مواد بر پایه سیلیس مورد استفاده قرار گیرد. در مطالعه حاضر، سیلیس بیشکل و فعال از کلش گندم به روش شست و شوی اسیدی با اسیدهای مختلف شامل HCl، HNO3، H2SO4 و H3PO4 با موفقیت استخراج گردید و از آن در سنتز نانوکامپوزیت Fe3O4@SiO2 استفاده شد. سپس، نانوکامپوزیت سنتز شده توسط گروه عاملی کیتوسان (CS) عاملدار شده تا بیونانوکامپوزیت Fe3O4@SiO2@CS به دست آید. ویژگیهای ساختاری مواد تولید شده با استفاده از آنالیزهای XRF، XRD، FT–IR، VSM، BET، SEM و پتانسیل زتا مورد بررسی قرار گرفت. نتایج حاصل نشان داد، سیلیس بیشکل و فعال با خلوص 52/96% با استفاده از شست و شوی اسیدی با HNO3 از کلش گندم استخراج شده است. همچنین، نتایج حاصل از آنالیز VSM خاصیت سوپر پارامغناطیسی بیونانوکامپوزیت Fe3O4@SiO2@CS را با خاصیت مغناطیسی emu g–1 17/55 نشان داد. به علاوه، نتایج حاصل از حذف رنگ نشان داد، میزان حذف رنگ بازیک قرمز 46 با استفاده از بیونانوکامپوزیت سنتز شده 97% بوده و ظرفیت جذب آن mg g–1 1700 میباشد که در مقایسه با سایر جاذبها بسیار بالاتر و مطلوبتر میباشد. جداسازی بیونانوکامپوزیت سنتز شده از محلولهای رنگی با استفاده از یک آهنربای خارجی انجام شد. | ||
| کلیدواژهها | ||
| پسماند کشاورزی؛ کلش گندم؛ بیونانوکامپوزیت Fe3O4@SiO2@CS؛ جذب سطحی؛ بازیک قرمز 46 | ||
| موضوعات | ||
| محیط زیست ، آلودگی | ||
| عنوان مقاله [English] | ||
| Synthesis of Fe3O4@SiO2@CS magnetic bio-nanocomposite by silica extracted from wheat straw for removal of Basic Red 46 dye from aqueous solutions | ||
| نویسندگان [English] | ||
| Elham najafi1؛ afsaneh shahbazi2؛ soran kamari3 | ||
| 1shahid beheshti university | ||
| 2Prof., Environmental Sciences Research Institute, Shahid Beheshti University, G.C., Tehran, Iran | ||
| 3Shahid Behesti university | ||
| چکیده [English] | ||
| In the present study, amorphous silica was successfully extracted from wheat straw by acid leaching technique using various acids including HCl, HNO3, H2SO4 and H3PO4 and was used in the synthesis of Fe3O4@SiO2 nanocomposite. Then, the synthesized nanocomposite were functionalized by chitosan functional group (CS) to obtain Fe3O4@SiO2@CS bionanocomposite. The percentages of the constituents, the crystallization state, the identification of the functional groups and the surface morphology of the produced materials were investigated using XRF, XRD, FT–IR, VSM, BET, SEM and zeta potential analyzes. Finally, the synthesized Fe3O4@SiO2@CS bionanocomposite was used for removal of Basic Red 46 dye from aqueous solutions as an efficient and effective adsorbent. The results showed that pure and active silica with purity of 96.52% was extracted from wheat straw using acid leaching with HNO3 acid. Also, the results of VSM analysis showed the superparamagnetic properties of Fe3O4@SiO2@CS bionanocomposite with magnetic properties of 17.55 emu g–1.In addition, the results of dye removal showed that the Basic Red 46 dye removal efficiency using synthesized Fe3O4@SiO2@CS bionanocomposite was 97% and adsorption capacity of it was 1700 mg g–1, which is much higher and desirable than many other adsorbents. | ||
| کلیدواژهها [English] | ||
| Agricultural waste, wheat straw, Fe3O4@SiO2@CS bionanocomposite, adsorption, Basic Red 46 | ||
| مراجع | ||
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