Abstract
We use reed alkali lignin to extract heavy metal adsorbent with the method of phenol modification. Then we study how the phenols addition amount, reaction temperature and reaction time affect the modified products’ adsorption of heavy metal. The results are as follows. The best adsorption of Pb2+, Cd2+, Cr3+ can be got when phenols addition amount is 4g, the reaction temperature is100°C and the reaction time is 90 min. Compared with alkali lignin, the adsorption rate gets an obvious improvement. The removal rate of Pb2+ rises from 92.4 to 97.8%. The removal rate of Cd2+ rises from 44.5 to 63.8%. The removal rate of Cr3+ rises from 43.4 to 62.5%. Also the adsorption rate improves with the increase of phenolic hydroxyl, which shows that the phenolic hydroxylfacilitates adsorption.
Published Version
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