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Dried, crushed, corncobs were carbonized at 500 o C and steam activated (in one- or two-step schemes), or activated with H 3 PO 4 . The products were characterized by N 2 adsorption at 77 K, using the BET, α s and DR methods. Adsorption capacity was demonstrated by the iodine and phenol numbers, and the isotherms of methylene blue and Pb 2+ ions,...
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