Figure 5
From: Ultrahigh and kinetic-favorable adsorption for recycling urea using corncob-derived porous biochar
(a) XPS spectra, (b) C1s spectra, and (c) O1s spectra of CPA, (d) XPS spectra, (e) C1s spectra, and (f) O1s spectra of CPB03, (g) XPS spectra, (h) C1s spectra, and (i) O1s spectra of CPB04, (j) XPS spectra, (k) C1s spectra, and (l) O1s spectra of CPB05.
