کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5116817 1485222 2017 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Biosorption removal of benzene and toluene by three dried macroalgae at different ionic strength and temperatures: Algae biochemical composition and kinetics
ترجمه فارسی عنوان
حذف بیولوژیکی بنزن و تولوئن توسط سه کلوچه خشک شده با قدرت و دمای مختلف یونی: ترکیب بیوشیمی جلبک و سینتیک
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
چکیده انگلیسی


- The biosorbents surface charge does not change with ionic strength.
- The hydrocarbons affinities were not affected at least up to I = 0.6 M.
- The macroalgae main constituents are carbohydrates, lignin and proteins.
- The hydrocarbon biosorption and biodesorption capacity increased with temperature.
- Benzene and toluene are adsorbed by London forces and hydrophobic interactions.

Release of low−molecular aromatic hydrocarbons (HC) into natural waters brings severe consequences to our environment. Unfortunately very limited information is available regarding the treatment of these pollutants. This work evaluated the use of brown, green and red macroalgae biomass as biosorbents of benzene and toluene, two of the most soluble HC. Raw seaweed biomasses were completely characterized, then evaluated under different temperatures and ionic strengths to assess their potential as biosorbents and to elucidate the biosorption mechanisms involved. Brown macroalgae registered the highest removal capacities for benzene and toluene (112 and 28 mg·g−1, respectively), and these were not affected at ionic strength < 0.6 M. Langmuir and Sips isotherm equations well described biosorption data, and the pseudo-second order model provided the best fit to the kinetics rate. Hydrocarbons are adsorbed onto the diverse chemical components of the cell wall by London forces and hydrophobic interactions.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Environmental Management - Volume 193, 15 May 2017, Pages 126-135
نویسندگان
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