بررسی سینتیک و ایزوترم جذب متیلن بلو از محلول آبی با استفاده از نانوکامپوزیت مغناطیسیPVA/AG/CuFe2O4

نوع مقاله : مقاله پژوهشی

نویسندگان

دانشگاه گیلان، دانشکده شیمی، رشت، ایران، صندوق پستی : 4193833697

چکیده

هدف از این پژوهش، سنتز یک جاذب جدید به منظور حذف رنگزای متیلن بلو از محلول در زمان کمتر بوده است. در ابتدا نانوذرات فریت مس با روش سولوترمال و نانو کامپوزیت مغناطیسی CuFe2O4/ PVA/AG با روش انجماد-ذوب و خشک کردن در دمای اتاق تهیه شدند. ساختار و ریخت‌شناسی نانو کامپوزیت مغناطیسی با استفاده از روش‌هایی مانند FTIR، XRD، SEM و EDX بررسی شد. جاذب CuFe2O4/ PVA/AG در شرایط بهینه 7=pH، زمان تماس60 دقیقه، مقدار جاذب mg 40 ، غلظت رنگزا  ppm5 و دمای °C 25 بررسی شد. بیشینه جذب و ظرفیت جذب به ترتیب برابر با 81.1 درصد و mg/g 14.93
به دست آمد. علاوه بر بررسی اثر بازیابی جاذب به منظور مقایسه، جاذب PVA/AG نیز در شرایط بهینه مذکور بررسی و بیشینه بازده حذف برای آن 63 درصد به دست آمد. در بررسی ایزوترم حالت تعادل حذف رنگزا تطابق خوبی با ایزوترم فروندلیچ دارد. سینتیک جذب سطحی بررسی شد و مشاهده گردید که فرآیند جذب بر روی نانو کامپوزیت مغناطیسی از معادلات سینتیکی شبه مرتبه دوم پیروی می‌کند. 

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Kinetic and Isotherm Investigations of Methylene Blue Adsorption from Aqueous Solution Using PVA/AG/CuFe2O4 Magnetic Nanocomposite

نویسندگان [English]

  • Roya Nayebi
  • Abdollah Fallah Shojaei
  • Maryam Pourjamal
Department of Chemistry, Faculty of Science, University of Guilan, P.O. Box: 4193833697, Rasht, Iran.
چکیده [English]

This research aims to synthesize a novel adsorbent and reduce the contact time in removing methylene blue dye. Copper ferrite nanoparticles were prepared by solvothermal method and CuFe2O4/PVA/AG magnetic nanocomposite by freeze-thaw method and drying at room temperature. The structure and morphology of magnetic nanocomposite were investigated using FTIR, XRD, SEM, and EDX methods. CuFe2O4/PVA/AG adsorbent under optimal conditions of pH = 7, contact time 60 min, amount of adsorbent 40 mg, dye concentration 5ppm and temperature 25 ᵒC was investigated. The maximum absorption and absorption capacity were obtained as 81.1 % and 14.93 mg/g, respectively. In addition to investigating the recovery effect of the adsorbent for comparison, the PVA/AG adsorbent was investigated under the aforementioned optimal conditions, and the maximum removal efficiency was 63.5 %. Examining the isotherm of the equilibrium state of dye removal matches well with the Freundlich isotherm. The kinetics of surface adsorption were investigated, and observed that the adsorption process on the magnetic nanocomposite follows pseudo-second-order kinetic equations.  

کلیدواژه‌ها [English]

  • Adsorption
  • Methylene blue
  • Isotherm
  • Kinetic
  • Nanocomposite
  • PVA/AG/ CuFe2O4

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