fig2
Figure 2. SEM images of (A) ZSC (B) and SC; (C) XRD pattern of ZSC and SC; and (D) FT-IR of ZSC and SC. SEM: Scanning electron microscopy; ZSC: ZnCl2 modified sludge biochar; SC: unmodified sludge biochar; XRD: X-ray diffraction; FT-IR: Fourier transform infrared spectroscopy.
