بررسی کارایی حذف فلوراید از محلول‌های آبی با استفاده از کربن اصلاح شده میوه بلوط: مطالعات ایزوترم و سینتیک جذب

رمضانی, علی; لرستانی, بهاره; سبحان اردکانی, سهیل; چراغی, مهرداد; نورمرادی, حشمت‌الله

doi:10.22034/jewe.2021.313333.1667

نوع مقاله : مقاله پژوهشی

نویسندگان

¹ دانشجوی دکتری، گروه محیط زیست، دانشکده علوم پایه، واحد همدان، دانشگاه آزاد اسلامی، همدان،ایران

² دانشیار، گروه محیط زیست، دانشکده علوم پایه، واحد همدان، دانشگاه آزاد اسلامی، همدان، ایران

³ استاد، گروه محیط زیست، دانشکده علوم پایه، واحد همدان، دانشگاه آزاد اسلامی، همدان، ایران

⁴ دانشیار، گروه محیط‌زیست، دانشکده علوم پایه، واحد همدان، دانشگاه آزاد اسلامی، همدان، ایران

⁵ دانشیار، گروه مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی ایلام، ایلام، ایران

https://doi.org/10.22034/jewe.2021.313333.1667

چکیده

فلوراید از جمله ترکیبات توسعه یافته‌ای است که از راه‌های مختلفی می‌تواند وارد منابع آبی شود. سازمان جهانی بهداشت حداکثر غلظت مجاز آن را در آب آشامیدنی mg/l5/1 توصیه نموده است، بطوریکه غلظت بیش از حد مجاز آن می‌تواند برای سلامتی موجودات زنده و بومسازگان مضر باشد. هدف این پژوهش تعیین کارایی کربن فعال اصلاح شده به روش حرارتی- شیمیایی از میوه بلوط در حذف فلوراید بود. این پژوهش در یک سیستم ناپیوسته در مقیاس آزمایشگاهی انجام شد. بدین منظور اثر پارامترهای مؤثر نظیر زمان، pH، غلظت، دوز جاذب و سایر عوامل دیگر بررسی شد. نتایج حاصل از آزمایش‌ها نشان داد که بیشترین مقدار حذف در مدت زمان min 90، 3pH=، دوزجاذب g/l1/0 و با غلظت آلاینده mg/l 50 صورت می‌گیرد. نتایج مدل‌های سنتیکی نشان داد که مدل فروندلیچ با ضریب تعیین (863/0=R²) نسبته به مدل لانگمویر با ضریب تعیین (736/0=R²) برای توصیف رفتار سنتیکی جاذب مدل بهتری است. تاکنون اکثر روشهای جذب برای حذف غلظت آلاینده mg/l 30 انجام شده است در مطالعه حاضر با غلظت آلاینده‌ ورودی mg/l 50 می‌توان اظهار نمود که کربن فعال اصلاح شده میوه بلوط بهعنوان یک جاذب ارزانقیمت، کارآمد و در دسترس برای حذف فلوراید از محلول‌های آبی محسوب می‌شود.

کلیدواژه‌ها

موضوعات

آلودگی آب

عنوان مقاله [English]

Evaluation of Removal Efficiency of Fluoride from Aqueous Solutions Using Modified Carbon of Oak Fruit: Isotherm and Kinetic Studies

نویسندگان [English]

Ali Ramezani ¹
Bahareh lorestani ²
Soheil Sobhan Ardakani ³
Mehrdad Cheraghi ⁴
Heshmatollah Nourmoradi ⁵

¹ Ph.D.. Scholar, Department of the Environment. College of Basic Sciences, Hamedan Branch, Islamic Azad University, Hamadan. Hamadan. Iran

² Assoc. Professor, Department of the Environment, College of Basic Sciences, Hamedan Branch, Islamic Azad University, Hamadan, Iran

³ Professor, Department of the Environment, College of Basic Sciences, Hamedan Branch, Islamic Azad University, Hamedan, Iran

⁴ Assoc. Professor, Department of the Environment, College of Basic Sciences, Hamedan Branch, Islamic Azad University, Hamedan, Iran

⁵ Assoc. Professor, Department of Environmental Health Engineering, School of Health, Ilam University of Medical Sciences, Ilam, Iran

چکیده [English]

Fluoride is one of the developed compounds that can enter water resources in different ways. The World Health Organization has recommended its maximum permissible concentration in drinking water of 1.5 mg/l so that its concentration exceeding the permissible limit can be harmful to the health of living organisms and ecosystems. The aim of this study was to determine the efficiency of activated carbon modified by the thermo-chemical method from oak fruit in fluoride removal. This research was conducted in a discontinuous system on a laboratory scale, and for this purpose, the effect of effective parameters such as time, pH, concentration, adsorbent dose, and other factors was investigated. The results of the experiments showed that the maximum amount of removal takes place during 90 min, pH=3, adsorbent dose of 0.1 g/l, and pollutant concentration of 50 mg/l. The results of the synthetic models showed that the Freundlich model with the coefficient of determination (R²=0.863) is a better model than the Langmuir model with the coefficient of determination (R2=0.736) to describe the synthetic behavior of the absorber. Until now, most absorption methods have been performed to remove the pollutant concentration of 30 mg/l. In the current study, with the input pollutant concentration of 50 mg/l, it can be stated that the activated carbon modified from the oak fruit is a cheap, efficient, and effective adsorbent. It is considered available to remove fluoride from aqueous solutions.

کلیدواژه‌ها [English]

Activated Carbon
Adsorbent
Aqueous Solutions
Fluorine
Oak

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محیط زیست و مهندسی آب

بررسی کارایی حذف فلوراید از محلول‌های آبی با استفاده از کربن اصلاح شده میوه بلوط: مطالعات ایزوترم و سینتیک جذب

مراجع

مراجع

Choong, C. E., Kim, M., Yoon, S., Lee, G. and Park, C. M. (2018). Mesoporous La/Mg/Si-incorporated palm shell activated carbon for the highly efficient removal of aluminum and fluoride from water. J. Taiwan Inst. Chem. Eng., 93, 306-314. DOI.

Nizam, S., Singh, H., Indra, V. and Sen, S. (2022). High levels of fluoride in groundwater from Northern parts of Indo-Gangetic plains reveals detrimental fluorosis health risks. Environ. Adv., 8, 100200. DOI. 10.1016/j.envadv.2022.100200.

دوره 8، شماره 3
مهر 1401
صفحه 551-563

بررسی کارایی حذف فلوراید از محلول‌های آبی با استفاده از کربن اصلاح شده میوه بلوط: مطالعات ایزوترم و سینتیک جذب

مراجع

مراجع

Choong, C. E., Kim, M., Yoon, S., Lee, G. and Park, C. M. (2018). Mesoporous La/Mg/Si-incorporated palm shell activated carbon for the highly efficient removal of aluminum and fluoride from water. J. Taiwan Inst. Chem. Eng., 93, 306-314. DOI.

Nizam, S., Singh, H., Indra, V. and Sen, S. (2022). High levels of fluoride in groundwater from Northern parts of Indo-Gangetic plains reveals detrimental fluorosis health risks. Environ. Adv., 8, 100200. DOI. 10.1016/j.envadv.2022.100200.

دوره 8، شماره 3مهر 1401صفحه 551-563

دوره 8، شماره 3
مهر 1401
صفحه 551-563