مهندسی شیمی ایران

مهندسی شیمی ایران

مطالعۀ تأثیر متغیرهای فرایند جذب برروی ظرفیت جذب و درصد حذف تولوئن از محلول‌های آبی با نانوذرات هیدروکسی آپاتیت مغناطیسی

نوع مقاله : مقاله پژوهشی

نویسندگان
1 کارشناس ارشد مهندسی مواد، پژوهشگاه مواد و انرژی
2 دانشیار مهندسی مواد، پژوهشگاه مواد و انرژی
3 استادیار مهندسی مواد، دانشگاه صنعتی شاهرود
4 استاد مهندسی مواد، پژوهشگاه مواد و انرژی
5 استاد شیمی، پژوهشگاه مواد و انرژی
چکیده
تولوئن در پساب­های صنعتی یکی از آلاینده­های بسیار خطرناک و مخرب محیط زیست بهشمار می‌آید. روش‌های متعددی برای حذف تولوئن از محلولهای آبی وجود دارد؛ یکی از روش‌های حذف تولوئن از محلول‌های آبی استفادهاز جذب سطحی است. در سالهای اخیر هیدروکسی آپاتیت مغناطیسی بهعنوان یک جاذب برای جدایش­های آلاینده­های محلولهای آبی، باتوجهبه خاصیت جدایش مغناطیسی و امکان استفادۀ مجدد مطرح شدهاست. در این پژوهش ابتدا هیدروکسی آپاتیت مغناطیسی بااستفادهاز روش همرسوبی، سنتز و سپس جذب تولوئن بااستفادهاز نانوذرات هیدروکسی آپاتیت مغناطیسی بررسی شد. ساختار نانوجاذب سنتز شد و بررسی فازی آن بهترتیب بااستفادهاز میکروسکوپ الکترونی روبشی و پراش پرتو ایکس بررسی شد. برای بررسی تغییر غلظت تولوئن از طیف‌سنج نوری ماورای بنفش و برای بررسی ریزساختار و ترکیب شیمیایی قبل و پس از جذب تولوئن از میکروسکوپ الکترونی روبشی و طیفسنجی پراش پرتو ایکس استفاده شد. بیشترین درصد حذف تولوئن 6/75 درصد و بیشترین ظرفیت جذب 980mg/g  بااستفادهاز نانوذرات هیدروکسی آپاتیت مغناطیسی دراین پژوهش بهدست آمد. نتایج نشان داد که نانوذرات هیدروکسی آپاتیت مغناطیسی سنتزشده، قابلیت جذب تولوئن را از محلولهای آبی داراست و می‌تواند بهعنوان جاذب این ترکیب آلی معرفی شود.
کلیدواژه‌ها

موضوعات


عنوان مقاله English

Studying the Effect of Adsorption Process Variables on Adsorption Capacity and Removal Percentage of Toluene from Aqueous Solutions by Magnetic Hydroxyapatite Nanoparticles

نویسندگان English

S. Kohkan zadeh 1
I. Mobasherpour 2
M. J. Molaee 3
E. Salahi 4
M. Pazouki 5
1 M. Sc. Student of Materials Engineering, Materials and Energy Research Center
2 Associate Professorof Materials Engineering, Materials and Energy Research Center
3 Assistant Professor of Materials Engineering, Shahrood University of Technology
4 Professor of Materials Engineering, Materials and Energy Research Center
5 Professor of Chemistry, Materials and Energy Research Center
چکیده English

The presence of toluene in industrial effluents is one of the most dangerous environmental pollutants, which is considered one of the factors that destroy the environment. There are several methods for removing toluene from aqueous solutions. One of the methods to remove toluene from aqueous solutions is adsorption. In recent years, magnetic hydroxyapatite has been proposed as an adsorbent for the separation of pollutants in aqueous solutions, due to its magnetic separation properties and the possibility of reuse. In this research, magnetic hydroxyapatite was synthesized using co-precipitation method and then toluene adsorption was investigated using magnetic hydroxyapatite nanoparticles. The structure and phase analysis of the synthesized nano-adsorbent were investigated using scanning electron microscope (SEM) and X-ray diffraction (XRD), respectively. An UV spectrophotometer was used to investigate the change in toluene concentration, and a scanning electron microscope and X-ray diffraction spectroscopy were used to investigate the microstructure and chemical composition before and after toluene adsorption. In this research, with using magnetic hydroxyapatite nanoparticles, the highest percentage of toluene removal and the highest adsorption capacity was 6.75% and 980 mg/g, respectively.
The results showed that the synthesized magnetic hydroxyapatite nanoparticles have the ability to adsorb toluene from aqueous solutions and can be introduced as an adsorbent of this organic compound.

کلیدواژه‌ها English

Nano Particle
Magnetic Hydroxyapatite
Toluene
Adsorption
Removal
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