Heavy Metal Adsorption Characterization of Lignocresol

Separation of lignin derivatives in lignocellulosics was carried out in a phase-separative reaction system composed of p-cresol and sulfulic acid at room temperature. Through the process, lignin was modified selectively at Cα-positions of propane chains, the most reactive sites, to give highly phenolic, light-colored which still retained original interunit linkages different from kraft lignin. In this study, we applied this highly phenolic lignin derivatives to metal adsorption. The ability of lignin derivatives was compared with Na-type Amberlite which is famous for cation exchange resin. The cation exchange capacity (CEC) was less than Amberlite, but vanadium and mercury ions were more adsorbed .