جذب زیستی یون‌های کادمیم از محلولهای آبی با استفاده از بیومس ساکارومایسس سرویسیه

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی دکترای محیط زیست، دانشکده منابع طبیعی و علوم دریایی، دانشگاه تربیت مدرس، نور

2 استادیار بیوتکنولوژی محیط زیست، دانشکده منابع طبیعی و علوم دریایی، دانشگاه تربیت مدرس، نور

چکیده

در این مطالعه، جذب زیستی یون‌های کادمیم از پسابهای صنعتی توسط مخمر ساکارومایسس سرویسیه مورد بررسی قرار گرفت. برای افزایش میزان جذب در این مطالعه یک آماده‌سازی اولیه توسط محلول اتانول 70 درصد بر روی سلول‌های مخمر انجام شد که موجب افزایش میزان جذب توسط این سلول‌ها گردید. مقادیر 5، 37/5 میلی‌گرم بر لیتر و 0/1 گرم بر لیتر برای pH، غلظت اولیه کادمیم و غلظت بیومس، به عنوان شرایط بهینه در میزان جذب تعیین شدند. از معادله فرندلیچ برای محاسبه میزان جذب توسط بیومس استفاده گردید. بیشترین میزان جذب یون‌های کادمیم (qmax) 25 میلی‌گرم بر گرم به‌دست آمد.

کلیدواژه‌ها


عنوان مقاله [English]

Biosorption of Cadmium(II) Ions by Saccharomyces cerevisiae Biomass from Aqueous Solutions

نویسندگان [English]

  • Farshid Ghorbani 1
  • Habibollah Younesi 2
1 Ph.D Student of Environmental, Faculty of Natural Resources and Marine Sciences, Tarbiat Modares Uni., Noor
2 Assis. Prof. of Environmental Biotechnology, Faculty of Natural Resources and Marine Sciences, Tarbiat Modares Uni., Noor
چکیده [English]

The biosorption of cadmium(II) ions onto Saccharomyces cerevisiae biomass from aqueous solutions was investigated. The cells were treated with 70% ethanol solution in order to increase the biosorption capacity of S. cerevisiae. The effect of solution pH, initial metal concentration and biomass dosage on biosorption by ethanol treated yeast was studied. Optima conditions of initial solution pH, Cd(II) ion concentration and biomass dosage were at 5, 37.5 mgL-1 and 0.1 gL-1, respectively. The Freundlich equation was applied to the experimental data. The maximum metal uptake value (qmax) was found as 25 mgg-1.

کلیدواژه‌ها [English]

  • Biosorption
  • Saccharomyces Cerevisiae
  • Cadmium
  • Industrial Wastewater
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