Surface Modification Effects on CNTs Adsorption of Methylene Blue and Phenol

Figure 6

Zeta potential of modified and as-synthesized CNTs: × CNT-A (as synthesized); ∆ CNT-A-HM; ▲ CNT-A-AM; ○ CNT-E (as synthesized); □ CNT-E-HM; ▪ CNT-E-AM. Each point is the average value of triplicate samples. Error bars represent the range.