STRUCTURE AND SORPTION PROPERTIES OF ACTIVATED CARBON BASED ON PINE BARK CARBONIZATS
UDC 661.832.2:544.723
Abstract
The dates about effect of temperature of carbonizats obtaining from pine bark on evolution of a porous structure and sorption properties of the activated carbons, synthesized by the method of thermoalkaline activation in the presence of КОН were presented. It was determined, that for preparation of activated carbons with the greatest specific surface (1421 and 1655 m2/g) and micropores volume (0.58 и 0.71 sm3/g) pine bark carbonizats reasonable to obtain at temperature 300 and 400 °С correspondingly. The correlation of a iodine sorption with volume of micropores width 0.73–3.0 nm (R2=0.964) and a methylene blue sorption with volume of micropores width 0.84–2.0 nm (R2=0.995), which present in the activated carbons structure, was established. It was shown, that low capacity of the activated carbons to vitamin B12 sorption determine by low mesopores volume with width ≥5 nm (no more than 0.0014 sm3/g). It was shown, that the activated carbon based on carbonizat obtained at 400 °С demonstrates a maximal sorption capacity to a iodine and a methylene blue (1.57 g/g и 697.1 mg/g correspondingly), that in 1.4 and 2.7 times exceeds the dates of an industrial activated carbon for medical purposes.
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