حذف آلاینده ی بروموکروزول سبز با استفاده از نانوکامپوزیت مغناطیسی آهن/کربن

نویسندگان

گروه شیمی، واحد شیراز، دانشگاه آزاد اسلامی، شیراز

چکیده

بروموکروزول سبز یک رنگ از خانواده تری فنیل متان هاست که به عنوان آلاینده در فاضلاب کارخانه های نساجی یافت می شود. در این کار حذف بروموکروزول سبز به عنوان یک آلاینده آب توسط نانوکامپوزیت مغناطیسی آهن/کربن بررسی شده است. برای انجام این کار درصد حذف با استفاده از طیف سنجی ماورای بنفش-مرئی محاسبه گردیده است. در ابتدا تاثیر پارامترهای تاثیرگذار مانند pH محلول، مقدار جاذب و زمان تماس بر روی فرایند جذب بررسی شد. بیشترین میزان حذف در pH 5 در طی زمان 2 دقیقه بدست آمد. همچنین، نانوجاذب ارائه شده جهت حذف بروموکروزول سبز در نمونه های حقیقی مورد استفاده قرار گرفت. سینتیک بالای جذب رنگ بر روی جاذب به عنوان یکی از مزایای این نانوجاذب مطرح است. همچنین طبق یافته های بدست آمده ایزوترم دوبین-رادشکویچ بهترین تطبیق را با داده های تجربی نشان می دهد. بر طبق این ایزوترم جذب بروموکروزول سبز بر روی جاذب بصورت فیزیکی انجام شده است. همچنین با استفاده از این ایزوترم مقدار Qm ماکزیمم ظرفیت جذب تئوریmg g-1 159 بدست می آید که نسبت به جاذب های دسترس دیگر مقدار قابل توجه ای است. نتایج حاصله بیانگر این است که نانوکامپوزیت مغناطیسی آهن/کربن بطور موفقیت آمیزی می تواند جهت حذف بروموکروزول سبز استفاده شود.

کلیدواژه‌ها


عنوان مقاله [English]

Removal of Bromocresol Green by Using of Iron Oxide/Carbon Nanocomposite

نویسندگان [English]

  • J. Salemiani
  • F. Honarasa
چکیده [English]

Bromocresol green is a dye of the triphenylmethane family which present as pollutant in textile industry. In this work, removal of bromocresol green as a water pollutant was performed by using of carbon/iron oxide magnetic nanocomposite. Removal efficiency of sorption process was obtained by using of UV-Vis spectroscopy. At first, the effect of important parameters on adsorption process such as pH, dose of sorbent and contact time was explored. The maximum removal was obtained at pH 5 during 2 minutes. Then, proposed nano sorbent was used for removal of bromocresol green in real samples. Also, equilibrium isotherm studies were examined by application of different conventional models such as Langmuir, Freundlich, Temkin and DR models to explain the experimental data. Fast kinetics of sorption process is one of the main advantages of proposed nano sorbent. Also, as a result, the best fitted model was DR which indicated physical absorption process. Also, Qm theoretical maximum adsorption capacity was obtained as 159 mg g-1 which is better than the corresponding values of other previously reported sorbent. As a result, iron oxide/carbon nanocomposite was used successfully for removal of bromocresol green.

کلیدواژه‌ها [English]

  • Iron oxide nanoparticles
  • Carbon dot
  • Bromocresol green
  • Pollutants
  • Nanocomposite
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