مطالعه فرایند جذب یون‌های کادمیوم توسط نانوکامپوزیت های Fe3O4 / L-متیونین/ گرافن اکسید و گرافن ایروژل از محیط‌های آبی

نوع مقاله : مقاله علمی پژوهشی


گروه شیمی، دانشکده علوم پایه، دانشگاه آزاد اسلامی،واحد علوم و تحقیقات، تهران، ایران


در این پژوهش، سنتز نانوکامپوزیت‌های L/Fe3O4 -متیونین و گرافن اکسید و گرافن ایروژل (Fe3O4/L-Met/GO,Fe3O4/L-Met ، Fe3O4/L-Met/GA) انجام شد. سپس ساختار نانوکامپوزیت های سنتز شده توسط آنالیزهای FT-IR، FE-SEM و BET تایید شد. سپس تأثیر پارامترهای تجربی مختلف مانند pH اولیه و زمان تماس بر فرآیند جذب سطحی کادمیوم مورد بررسی قرار گرفتند. نتایج نشان داد که بالاترین درصد جذب کادمیوم (90%) در Ph=6 توسط نانو جاذب Fe3O4/L-Met/GA رخ داد. بنابراین، ظرفیت جذب کادمیوم ( Cd2+) توسط نانوکامپوزیت‌ Fe3O4/L-Met/GA (212.31 میلی‌گرم بر گرم) بیشتر از ظرفیت جذب کادمیوم ( Cd2+) توسط نانوکامپوزیت‌های Fe3O4/L-Met (201.23 میلی‌گرم بر گرم) به دست آمد. داده‌های سینتیک جذب برازش عالی را با مدل‌های شبه مرتبه دوم (R2> 0.99) و مدل‌های ایزوترم فروندلیچ نشان دادند.



عنوان مقاله [English]

Study the absorption process of cadmium ions by Fe3O4/L-methionine/graphene oxide and graphene Aerogel nanocomposites from aqueous environments

نویسندگان [English]

  • Nooshin Abbasi
  • Parviz Aberoomand Azar
  • Mohammad Saber Tehrani
  • javad Mokhtari Aliabad
Department of Chemistry, Faculty of Basic Sciences, Science and Research Branch, Islamic Azad University,Tehran,, Iran
چکیده [English]

In this research, the synthesis of L/Fe3O4-methionine and graphene oxide and graphene aerogel nanocomposites (Fe3O4/L-Met/GO, Fe3O4/L-Met, Fe3O4/L-Met/GA) was carried out. Then the structure of the synthesized nanocomposites was confirmed by FT-IR, FE-SEM and BET analyses. Then, the effect of different experimental parameters such as initial pH and contact time on the process of cadmium surface adsorption were investigated. The results showed that the highest percentage of cadmium absorption (90%) occurred at Ph=6 by Fe3O4/L-Met/GA nano adsorbent. Therefore, the cadmium (Cd2+) absorption capacity by Fe3O4/L-Met/GA nanocomposite (212.31 mg/g) is higher than the cadmium (Cd2+) absorption capacity by Fe3O4/L-Met nanocomposites (201.23 mg/g). ) Obtained. Adsorption kinetics data showed excellent fit with pseudo-second-order models (R2>0.99) and Freundlich isotherm models.showed high adsorption capacity towards Cd2+ (212.31 mg/g), which was significantly higher than Fe3O4/L-Met (201.23 mg/g). Finally, adsorption kinetics, isotherm studies were investigated. Absorption data showed excellent fit with quasi-second order models (R2> 0.99) and Freundlich isotherm models.

کلیدواژه‌ها [English]

  • L-methionine
  • graphene oxide
  • graphene aerogel
  • adsorption capacity
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