حذف فلزات سنگین نیکل و مس از محلول‌های آبی با استفاده از هیدروکسی‏ آپاتیت اصلاح شده توسط نانو ذرات آهن صفر ظرفیتی

امیری, محمد جواد

doi:10.22034/jewe.2022.335738.1754

نوع مقاله : مقاله پژوهشی

نویسنده

محمد جواد امیری

دانشیار، گروه علوم و مهندسی آب، دانشکده کشاورزی، دانشگاه فسا، فسا، ایران

https://doi.org/10.22034/jewe.2022.335738.1754

چکیده

در این مطالعه نانوذرات آهن صفر ظرفیتی به روش احیای کلرید فریک توسط بوروهیدرید سدیم سنتز و بر روی هیدروکسی آپاتیت تثبیت گردید. به منظور ارزیابی جاذب در حذف فلزات سنگین مس و نیکل، اثر پارامترهای مختلف جذب مانند زمان تماس، دما، غلظت اولیه یون‬های فلزی، میزان جاذب و pH مورد بررسی قرار گرفت. بالاترین میزان راندمان جذب هر دو فلز در حالت pH برابر با 7، زمان ماند برابر با min 45، دمای C˚ 80، میزان جاذب g 1/0 و غلظت اولیه mg L-1 5 بدست آمد. نتایج نشان داد که داده‬های سینتیک و ایزوترم جذب به‌ترتیب به‌خوبی از معادلات شبه مرتبه دوم و لانگمویر- فروندلیچ پیروی می‬کنند. حداکثر ظرفیت جذب جاذب برای حذف فلزات مس و نیکل به‬ترتیب ‏mg g-1 138‏ و ‏mg g-1 108‏ به دست آمد. نتایج نشان داد که جاذب به‬دلیل سطح مخصوص و واکنش‬پذیری زیاد در مدت زمان min 45 بدون کنترل pH قادر به حذف بیش از 95% درصد فلزات فوق است. بررسی تغییرات پارامترهای ترمودینامیکی نظیر تغییرات آنتالپی، آنتروپی و انرژی آزاد گیبس نشان داد که جذب به لحاظ ترمودینامیکی مطلوب بوده و از طریق فرآیندهای خودبخودی رخ می‬دهد.

کلیدواژه‌ها

موضوعات

آلودگی آب

عنوان مقاله [English]

Removal of Cu(II) and Ni(II) Metal Ions from Aqueous Solutions Using Modified Hydroxyapatite by Zero-Valent Iron Nanoparticles

نویسنده [English]

Mohammad Javad Amiri

Assoc. Professor, Department of Water Engineering, Faculty of Agriculture, Fasa University, Fasa, Iran

چکیده [English]

In this study, hydroxyapatite-supported zero-valent iron nanoparticle was synthesized by the sodium borohydride reduction method. To evaluate the performance of adsorbent for the removal of Cu(II) and Ni(II) ions, the inﬂuence of different sorption parameters, such as contact time, temperature, initial concentration of metal ions, the dosage of adsorbent, and pH value of the solutions were investigated. The highest removal efficiency of both metals occurred under the optimal conditions of 7, 45 min, 0.1, 50 ºC, and 5 mg/l for pH, contact time, adsorbent mass, temperature, and initial concentration, respectively. The kinetic and equilibrium data were well ﬁtted by the pseudo-second-order model and Langmuir- Freundlich model, respectively. The maximum adsorption capacities of adsorbent towards Cu(II) and Ni(II) were 138 and 108 mg/g, respectively. The results indicated that the adsorbent could remove the majority of metals (95%) within 40 min without pH control. Thermodynamic parameters, i.e., ΔG°, ΔH°, and ΔS°, indicated that the sorption process was spontaneous and thermodynamically favorable.

کلیدواژه‌ها [English]

Adsorption
Entropy
Isotherm
Kinetics
ZVI Nanoparticles

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محیط زیست و مهندسی آب

حذف فلزات سنگین نیکل و مس از محلول‌های آبی با استفاده از هیدروکسی‏ آپاتیت اصلاح شده توسط نانو ذرات آهن صفر ظرفیتی

مراجع

مراجع

دوره 9، شماره 2
تیر 1402
صفحه 195-210

حذف فلزات سنگین نیکل و مس از محلول‌های آبی با استفاده از هیدروکسی‏ آپاتیت اصلاح شده توسط نانو ذرات آهن صفر ظرفیتی

مراجع

مراجع

دوره 9، شماره 2تیر 1402صفحه 195-210

دوره 9، شماره 2
تیر 1402
صفحه 195-210