Publisher: Altai State University
Journal: Khimiia rastitel'nogo syr'ia (Chemistry of plant raw material)
Subjects: опилки; кислоты; катиониты; выход; сильнокислотные группы; слабокислотные группы; сорбция; кадмий; цинк; свинец, Sawdust, acids, cation exchangers, yield, strong acid groups, weakly acid groups, sorption, cadmium, zinc, lead
Influence of the nature of acid reagents (H2SO4, HСlO4, 4-CH3C6H4SO3H, ClCH2COOH, H3PO4) on yield and sorption properties of cation exchangers derived from pine sawdust has been studied. The highest yield cation exchanger is observed when using phosphoric acid. Cation exchangers contain strong and weakly acid functional groups, the total capacity on the cation Na+ of individual samples up to 2 mmol/g. Sorbents obtained by using sulfuric, perchloric and phosphoric acids have a high affinity for cations Cd2+ and Pb2+; capacity for these cations varies in the range of 1,0–1,5 mmol/g.
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