ENERGY SAVING APPROACH TO CHEMICAL PROCESSING OF LIGNOCELLULOSIC FEEDSTOCK INTO SORPTIVE MATERIALS
High porous activated carbons were prepared by microwave-induced phosphoric acid activation of lignocellulosic raw material. It was established that the parameters of porous structure of carbons obtained are increased with increasing of treatment duration and reach maximum under 3–5 min staying. Maximum BET surface area achieved during the microwave treatment with energy load 120 Wt.min/(g.mL) is 1085 m2/g. Total pore volume reaches almost 0,7 cm3/g. Pore size distributions indicates that carbons consists of micropores (0.9–1.1 nm) and mesopores with size 4 nm. Obtained carbons have high adsorption capacity towards copper ions from aqueous solutions at pH £ 4. The results proved that this process is rapid, power-efficient and economic. Bibl. 10, Fig. 3, Tab. 1.
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