مشخصات پژوهش

عنوان	Sargassum macro-algae-derived activated bio-char as a sustainable and cost-effective adsorbent for cationic dyes: A joint experimental and DFT study
نوع پژوهش	مقاله چاپ شده
کلیدواژه‌ها	Activated bio-char, Physical activation, Density functional theory, Adsorption, Cationic dyes
چکیده	Activated bio-char prepared from the pyrolysis and CO2-based physical activation of Sargassum macro-algae was developed as a sustainable and cost-effective adsorbent for malachite green (MG) and methylene blue (MB) adsorption. Prepared activated bio-char was characterized with CHNS, FESEM, Raman, FT-IR and N2 adsorption/desorption methods. Langmuir isotherm and pseudo second order kinetics model best fitted equilibrium and kinetics data. The maximum adsorption capacity for MG and MB were 500 and 204.8 mg/g. The effect of solution pH and temperature on adsorption efficiency was studied and discussed. Acid treatment easily regenerated the adsorbent. After 5 cycles, the MB and MG adsorption efficiency reached 89 % and 78 %, respectively. A Density Functional Theory (DFT) calculation showed that pH-N-(CH3)2 of MB was strongly attracted to the -COOH functional groups in activated bio-char. For MG, the order of preferred interactions between the ph-N-(CH3)2 groups and the functional groups of adsorbent was -CONH2>-COOH>-COH.
پژوهشگران	میشلا سیگنورتو (نفر ششم به بعد)، عفت کیانپور (نفر ششم به بعد)، سیده فریماه موسوی (نفر پنجم)، سیده سمیه تقوی (نفر چهارم)، رفیعه السادات نوروزیان (نفر سوم)، امیرمحمد لشکر بلوک (نفر دوم)، سیده ساجده جعفریان امیری (نفر اول)