The modified AC samples obtained from 700 °C, 900 °C and 1100 °C
together with the raw state were designated as AC1, AC2, AC3 and AC0,
respectively. In order to primarily explore the phenol adsorption
performance of all AC samples, adsorption experiment was carried
out at temperature of 25 °C and initial phenol concentration of
1000 mg·L−1. As shown in Fig. 1, it can be observed that the phenol adsorption
of all the three AC samples after thermal modification is superior
to the raw sample and the order of phenol adsorption is as follows:
AC2 N AC1 N AC3 N AC0. In consideration of phenol adsorption on various
modified AC samples, the optimum modification temperature is 900 °C,
followed by 700 °C and 1100 °C.