Oth sur des charbons ardents - OTH Sur Des Charbons


Activated carbons were prepared by phosphoric acid activation from Arabica coffee grounds at different impregnation ratios (defined as the ratios of weight (g) of H3PO4 to the weight (g) of precursor) : 30, 60, 120 and 180 % by heating to 450 °C in air. The adsorption properties of the Prepared Activated Carbons (PACs) have been compared to a commercial activated carbon (CAC) (obtained by steam activation) and related to their preparation methods, porous structure and surface chemistry. The PACs and CAC were characterized for their surface chemistry by thermogravimetric analysis, Infra-Red spectroscopy, pH measurement of the point of zero charge (pHpzc), surface functional groups semi-quantitative titrations ("Boehm" method) and X-ray microanalysis; and for their porous structure and morphology by nitrogen adsorption at 77 K. Scanning Electron Microscopy (SEM) and methylene blue adsorption. The PACs and CAC were compared for their adsorption of "Nylosan Red N-2RBL" (Clariant) which is an anionic (azo) dye used in Nylon (polyamide 6 and polyamide ) dyeing. Reviews User-contributed reviews Add a review and share your thoughts with other readers. Be the first. Add a review and share your thoughts with other readers. Be the first.
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