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This paper presents sewage sludge to produce an adsorbent for Direct Fast Brown M removal. The optimal conditions for a larger surface area adsorbent were 4 M ZnCl2-immersed sludge pyrolyzed at 550degC for 60 min, the highest BET surface area and micropore area achieves 174 m2/g, and 95 m2/g, respectively. The experiment to adsorb the Direct Fast Brown M waste water was carried out. It is noteworthy...