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Fe3O4/rice husk/ polypyrrole nanocomposite as a sorbent for efficient lead removal | ||
| Iranian Journal of Analytical Chemistry | ||
| دوره 11، شماره 2 - شماره پیاپی 22، آذر 2024، صفحه 203-210 اصل مقاله (687.83 K) | ||
| نوع مقاله: Full research article | ||
| شناسه دیجیتال (DOI): 10.30473/ijac.2026.77082.1335 | ||
| نویسندگان | ||
| Fatemeh Sabermahani* 1؛ Mohammad Daneshpazhooh2 | ||
| 1Department of Chemistry, Payame Noor University, Kerman, Iran | ||
| 2Department of Chemistry, PayameNoor University, Kerman, Iran | ||
| چکیده | ||
| Heavy metal pollution, particularly lead (Pb2+), poses a significant threat to the environment and human health. In this study, Fe3O4/rice husk/ polypyrrole (Fe3O4/Rh/PPy) nanocomposite was synthesized and used for removal of lead from aqueous solutions. In the first, Fe3O4 magnetic nanoparticle was prepared through a simple and one step method and then polypyrrole (PPy) was synthesised chemically on the surface of nanoparticle. FeCl3 was used as chemical oxidants for oxidation of pyrrole to PPy. The new nanocomposite was characterized by FT-IR, SEM and Dynamic Light Scattering method. The effect of pH, contact time, adsorbent dose, initial concentration, ionic strength and the effect of temperature on the adsorption was checked out in a batch process. Optimal adsorption conditions were determined at pH~ 7, 0.04 g dosage, 45 min contact time, and 30 ppm initial lead concentration, yielding a maximum lead removal efficiency of 99.7 %. Using the equilibrium constants obtained at different temperatures, the thermodynamic parameters were calculated and showed that the uptake of lead is spontaneous and exothermic. The maximum adsorption capacity by using Langmuir equation was calculated 85.47 mg/g. The kinetic data followed by Pseudo second. | ||
| کلیدواژهها | ||
| Fe3O4/rice husk/ polypyrrole nanocomposite؛ Removal؛ Lead | ||
| عنوان مقاله [English] | ||
| نانوکامپوزیت پلی پیرول/ سبوس برنج/ Fe3O4 بعنوان یک جاذب برای حذف موثر سرب | ||
| نویسندگان [English] | ||
| محمد دانش پژوه2؛ | ||
| 1بخش شیمی، دانشگاه پیام نور، کرمان، ایران | ||
| چکیده [English] | ||
| نانوکامپوزیت پلی پیرول/ سبوس برنج/ Fe3O4 بعنوان یک جاذب برای حذف موثر سرب آلودگی عناصر سنگین خصوصا سرب رفتار ویژه ای برروی سلامتی انسان و محیط زیست دارد. در این مطالعه نانوکامپوزیت پلی پیرول/ سبوس برنج/ Fe3O4 ( Fe3O4/Rh/ppy ( سنتز و برای حذف سرب از محیطهای آبی استفاده شد. در ابتدا نانوذره مغناطیسی Fe3O4 با یک روش ساده و یک مرحله ای آماده و سپس پلی پیرول برای کارایی بیشتر جاذب به طریق شیمیایی برروی سطح نانوذره قرار گرفت. FeCl3 بعنوان اکسید کننده برای اکسیداسیون پیرول استفاده شد. نانوکامپوزیت جدید توسط FT-IR SEM , وDLS مورد بررسی قرار گرفت. اثر pH ، زمان تماس، مقدار جاذب، غلظت سرب، قدرت یونی و اثردما برروی جذب بروش ناپیوسته بررسی شد . بهترین شرایط در pH~ 7 ، مقدار جاذب 04/0 گرم ، زمان تماس 45 دقیقه، غلظت اولیه ppm 30 تعیین گردید که منجر به بیشترین جذب سرب با درصد حذف 7/99 گردید. با استفاده از ثابتهای تعادلی بدست آمده در دماهای مختلف، پارامترهای ترمودینامیکی محاسبه شدندکه بیانگر خودبخودی و گرمازا بودن فرآیند جذب سرب می باشد. حداکثر ظرفیت جذب با استفاده ازمعادله لانگمویر47/85 میلی گرم بر گرم محاسبه شد. داده های سینتیکی با شبه مرتبه دوم مطابقت داشتند. | ||
| کلیدواژهها [English] | ||
| لغات کلیدی: نانوکامپوزیت پلی پیرول/ سبوس برنج/ Fe3O4, حذف, سرب | ||
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