Activated Carbon from Agricultural Wastes for Adsorption of Organic Pollutants
Autor: | Małgorzata Zienkiewicz-Strzałka, Anna Deryło-Marczewska, Barbara Charmas, V.M. Bogatyrov, M. Błachnio, M.V. Galaburda |
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Jazyk: | angličtina |
Rok vydání: | 2020 |
Předmět: |
adsorption equilibrium
Pharmaceutical Science dye adsorption 02 engineering and technology Raw material 010402 general chemistry Waste Disposal Fluid 01 natural sciences MCPA Article Water Purification Analytical Chemistry lcsh:QD241-441 chemistry.chemical_compound Acetic acid Adsorption herbicide adsorption lcsh:Organic chemistry Specific surface area Drug Discovery medicine activated carbon Crystal violet Physical and Theoretical Chemistry Chemistry Organic Chemistry Agriculture 021001 nanoscience & nanotechnology 0104 chemical sciences Chemical engineering Chemistry (miscellaneous) Charcoal Carbon dioxide Molecular Medicine 0210 nano-technology Water Pollutants Chemical Activated carbon medicine.drug adsorption kinetics |
Zdroj: | Molecules Volume 25 Issue 21 Molecules, Vol 25, Iss 5105, p 5105 (2020) |
ISSN: | 1420-3049 |
DOI: | 10.3390/molecules25215105 |
Popis: | Agricultural waste materials (strawberry seeds and pistachio shells) were used for preparation of activated carbons by two various methods. Chemical activation using acetic acid and physical activation with gaseous agents (carbon dioxide and water vapor) were chosen as mild and environmentally friendly methods. The effect of type of raw material, temperature, and activation agent on the porous structure characteristics of the materials was discussed applying various methods of analysis. The best obtained activated carbons were characterized by high values of specific surface area (555&ndash 685 m2/g). The Guinier analysis of small-angle X-ray scattering (SAXS) curves showed that a time of activation affects pore size. The samples activated using carbon dioxide were characterized mostly by the spherical morphology of pores. Adsorbents were utilized for removal of the model organic pollutants from the single- and multicomponent systems. The adsorption capacities for the 4-chloro-2-methyphenoxyacetic acid (MCPA) removal were equal to 1.43&ndash 1.56 mmol/g however, for adsorbent from strawberry seeds it was much lower. Slight effect of crystal violet presence on the MCPA adsorption and inversely was noticed as a result of adsorption in different types of pores. For similar herbicides strong competition in capacity and adsorption rate was observed. For analysis of kinetic data various equations were used. |
Databáze: | OpenAIRE |
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