The CCA carbonized at 1000 °C (CCA-1000) showed a good adsorption effect on methylene blue as a cationic dye, methyl orange as an anionic dye, oil red O as a solvent dye, and nine other dyes.

Key Laboratory of Fine Petro-chemical Technology, Jiangsu Polytechnic University, Changzhou 213164, People’s Republic of China, College of Chemistry, Chongqing Normal University, Chongqing 400047, ...