کاربرد روش سطح پاسخ جهت بهینه سازی حذف رنگ مالاشیت سبز با نانو جاذب Cl-nZVI

نوع مقاله: مقاله پژوهشی

نویسندگان

1 عضو هیئت علمی گروه محیط زیست، دانشکده منابع طبیعی، دانشگاه کردستان، سنندج

2 دانشجوی کارشناسی ارشد رشته محیط زیست، دانشکده منابع طبیعی، دانشگاه کردستان، سنندج

3 دانشجوی کارشناسی رشته محیط زیست، دانشکده منابع طبیعی، دانشگاه کردستان، سنندج

چکیده

تخلیه پساب‌های رنگی به اکوسیستم‌های طبیعی خطرات جدی را برای محیط زیست و حیات آبی ایجاد نموده است. مالاشیت سبز یک رنگ بازی است که کاربردهای صنعتی بسیار گسترده به‌خصوص در صنعت آبزی پروری در سطح دنیا دارد. در این پژوهش کاربرد طراحی ترکیبی مرکزی تحت روش سطح پاسخ در جذب رنگ مالاشیت سبز از محلول‌های آبی با استفاده از نانوجاذب ترکیبی کلینوپتیلولایت- نانو ذرات آهن (Cl-nZVI) بررسی شد. ساختار جاذب تولید شده با استفاده از آنالیزهای میکروسکوپ الکترونی روبشی، آنالیز عنصری به روش تفرق اشعه ایکس و آنالیز تعیین ویژگی‌های مغناطیسی توصیف شد. اثر پارامترهای مختلف شامل pH، غلظت اولیه رنگ و دز جاذب بر میزان کارایی جذب برای یافتن بهترین شرایط جذب مورد مطالعه قرار گرفت. در مجموع20 سری آزمایش توسط نرم افزار (Design Expert.7.0) طراحی شد و کارایی جذب به‌عنوان پاسخ به نرم‌افزار داده شد. مقادیر بهینه برای سه متغیرpH، دز جاذب و غلظت رنگ مالاشیت سبز به‌ترتیب برابر با 6/5، 43/1 گرم در لیتر و 21/49 میلی‌گرم در لیتر بوده است. تحت شرایط بهینه پارامترهای مؤثر در فرایند جذب، کارایی جذب بالایی (90/57 درصد) برای حذف رنگ MG به‌دست آمد. به‌علاوه میزان مطلوبیت در فرایند بهینه‌سازی 963/0 به‌دست آمد. بر اساس نتایج به‌دست آمده، جاذب Cl-nZVI می‌تواند یک گیرنده مناسب و ارزان قیمت برای جذب رنگ مالاشیت سبز از پساب صنایع نساجی و فعالیت آبزی پروری باشد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Application of Response Surface Methodology to Optimize Malachite Green Removal by Cl-nZVI Nanocomposites

نویسندگان [English]

  • Farshid Ghorbani 1
  • Hadieh Molavi 2
  • Somayeh Fathi 3
  • Fatemeh Piri 3
1 University Of Kurdistan
2 MSc Student of Environmental Engineering, Faculty of Natural Resources, Kurdistan University, Sanandaj
3 BS Student of Environmental Engineering, Faculty of Natural Resources, Kurdistan University, Sanandaj
چکیده [English]

Disposal of effluents containing dyes into natural ecosystems pose serious threats to both the environment and its aquatic life. Malachite green (MG) is a basic dye that has extensive industrial applications, especially in aquaculture, throughout the world. This study reports on the application of the central composite design (CCD) under the response surface methodology (RSM) for the optimization of MG adsorption from aqueous solutions using the clinoptilolite nano-zerovalence iron (Cl-nZVI) nanocomposites. The sorbent structures produced are characterized by means of scanning electron micrograph (SEM), energy-dispersive X-ray spectroscopy (EDS), and vibrating sample magnetometer (VSM). The effects of different parameters including pH, initial MG concentration, and sorbent dosage on the removal efficiency (R) of MG were studied to find the optimum operating conditions. For this purpose, a total of 20 sets of experiments were designed by the Design Expert.7.0 software and the values of removal efficiency were used as input response to the software. The optimum pH, initial MG concentration, and sorbent dosage were found to be 5.6, 49.21 mg.L-1, and 1.43 g.L-1, respectively. A high MG removal efficiency (57.90%) was obtained with optimal process parameters. Moreover, a desirability value of 0.963 was obtained for the optimization process.

کلیدواژه‌ها [English]

  • Malachite Green
  • Magnetic adsorbent
  • optimization
  • Response Surface Methodology

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