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Synthesis of Shrimp shell-derived Biochar@starch/CoFe2O4NPs and Its Applications as a Eco-friendly and Effective Adsorbent for Removal of Cd(II) ion from Aqueous Environments: Isotherms, Kinetics, and Thermodynamics Analysis | ||
| Iranian Journal of Analytical Chemistry | ||
| دوره 12، شماره 2 - شماره پیاپی 24، آذر 2025، صفحه 95-110 اصل مقاله (1.25 M) | ||
| نوع مقاله: Full research article | ||
| شناسه دیجیتال (DOI): 10.30473/ijac.2026.78623.1350 | ||
| نویسندگان | ||
| Farzaneh Marahel* ؛ Seyed Mehdi Dardari؛ Zohreh Saadati؛ Marjan Sheibani | ||
| Department of Chemistry, Om. C., Islamic Azad University, Omidiyeh, Iran. | ||
| چکیده | ||
| This study explores the potential of shrimp shell-derived biochar@starch/CoFe2O4NPs for heavy metals and toxic pollutants removal from aqueous environments. The adsorption of Cd(II) ion was studied under the various conditions, including pH, time, adsorbent dose, and temperature. The adsorption process was best described by the Langmuir isotherm and pseudo-second-order kinetic models, indicating monolayer adsorption and chemisorption-dominated interactions. The maximum adsorption capacity was determined to be 56.6 mgg-1 at 298 °K. Thermodynamic results indicated that the process was spontaneous and exothermic. The calculated thermodynamic parameters, such as ΔG°, ΔH° and ΔS° for Cd(II) ion uptake on the adsorbent surface, come out to be -3.45 kJ mol-1, -17.06 kJ mol-1 and -41.26 J mol-1. K-1, respectively. The removal efficiency Cd(II) ion from actual water samples higher reached 90.0 %, although the efficiency decreased with increasing salt concentration. These findings demonstrate that shrimp shell-derived biochar modified with starch/CoFe2O4NPs is a sustainable, low-cost, and environmentally friendly adsorbent with significant potential for Cd(II) ion remediation in contaminated water systems. | ||
| کلیدواژهها | ||
| Cadmium؛ CoFe2O4 nanoparticles؛ Shrimp shells؛ Aqueous environments | ||
| عنوان مقاله [English] | ||
| سنتز بیوچار مشتقشده از پوسته میگو اصلاحشده با نشاسته/ نانوذرات CoFe2O4 و کاربرد آن به عنوان جاذبی مؤثر و سازگار با محیط زیست برای حذف یون کادمیم از محیطهای آبی: تحلیل ایزوترم، سینتیک و ترمودینامیک | ||
| نویسندگان [English] | ||
| فرزانه مراحل؛ سید مهدی درداری؛ زهره سعادتی؛ مرجان شیبانی | ||
| گروه شیمی واحد امیدیه، دانشگاه آزاد اسلامی، امیدیه، ایران. | ||
| چکیده [English] | ||
| این مطالعه به بررسی پتانسیل بیوچار مشتقشده از پوسته میگو اصلاحشده با نشاسته/ نانوذرات CoFe2O4. برای جذب فلزات سنگین و آلایندههای سمی از محیطهای آبی میپردازد. جذب یون کادمیم (II) تحت شرایط مختلف، از جمله pH، زمان تماس، دوز جاذب و دما مورد مطالعه قرار گرفت. فرآیند جذب به بهترین وجه توسط مدلهای ایزوترم لانگمویر و سینتیک شبه درجه دوم توصیف شد که نشاندهنده جذب تک لایه و برهمکنشهای غالب جذب شیمیایی است. حداکثر ظرفیت جذب 6/56 میلیگرم بر گرم در دمای 298 درجه کلوین تعیین شد. آنالیزهای ترمودینامیکی نشان داد که فرآیند جذب خود به خودی و گرمازا است. پارامترهای ترمودینامیکی محاسبهشده، مانند ΔG°،ΔH° و ΔS°برای جذب یون کادمیم (II) بر روی سطح جاذب، kJ mol-1 45/3-، kJ mol-1 06/17- و J mol-1. K-1 26/41- به دست آمدند. راندمان حذف یون کادمیم (II) از نمونههای آب واقعی بالاتر از 90 درصد بود، اگرچه راندمان با افزایش غلظت نمک کاهش یافت. این یافتهها نشان میدهد که بیوچار مشتقشده از پوسته میگو اصلاحشده با نشاسته/ نانوذرات CoFe2O4 یک جاذب پایدار، کمهزینه و سازگار با محیط زیست با پتانسیل قابل توجه برای حذف یون کادمیم در سیستمهای آب آلوده است. | ||
| کلیدواژهها [English] | ||
| کادمیم, نانوذرات CoFe2O4, پوسته میگو, محیطهای آبی | ||
| مراجع | ||
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آمار تعداد مشاهده مقاله: 3 تعداد دریافت فایل اصل مقاله: 4 |
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