Fig. 2From: Specifically designed amine functional group doped sludge biochar for inorganic and organic arsenic removalFTIR spectrums of (a) SBC, (b) 33%ZnCl2-SBC, (c) 50%ZnCl2-SBC, (d) 60%ZnCl2-SBC and (e) 67%ZnCl2-SBCBack to article page