In the range of experimental concentrations there existed the competitive adsorption between dyes and AT. Compared with free-dye system, Congo red (CR) and methylene blue (MB) decreased the adsorption percentage of AT 14.29% and 30.16%, respectively.

• 结果表明；与对照相比；刚果红(CR)和亚甲基蓝(MB)在实验浓度范围内均与AT发生竞争吸附；分别使AT的吸附率降低了14.；29%25和30