Fig. 5
From: Enhanced adsorption of phenol using EDTA-4Na- and KOH-modified almond shell biochar
Influence of different ratios of pyrolysis materials (biochar, KOH, EDTA) on adsorption. For preparation, the pyrolysis temperature was 750 °C, the time was 60 min, the nitrogen gas flow rate was 100 mL min−1, and the heating rate was 5 °C min−1