Fig. 2
From: Effect of natural aging on biochar physicochemical property and mobility of Cd (II)
FTIR spectra of BC and AB before and after adsorption of Cd2+ (BC: original biochar; AB: aged biochar before adsorption of Cd2+; BC + Cd: original biochar after adsorption of Cd2+; AB + Cd: aged biochar after adsorption of Cd2+).
