超声前处理强化活性炭吸附活性艳红X-3B染料废水

探究了超声前处理活性艳红X-3B染料废水强化活性炭吸附降解性能及不同超声参数的影响规律,包括超声功率和超声时间。研究结果表明,超声前处理活性艳红X-3B染料废水可通过空化效应使有机大分子裂解为小分子易于被活性炭吸附,同时可强化其到活性炭微孔中传输,提高了活性炭吸附降解性能,最佳超声功率为320 W。浓度越高,所需超声时间越长,当超声达到一定时间后,继续超声不会影响染料分子的吸附。超声前处理虽然不会改变吸附平衡时间,但可有效增加活性炭处理活性艳红X-3B染料废水的饱和吸附量。

Enhancement of activated carbon adsorbing reactive brilliant red X-3B dye wastewater by ultrasound pretreatment

In this work, enhancing activated carbon adsorbing reactive brilliant red X-3B dye wastewater by ultrasound pretreatment was explored. Effects of different ultrasound parameters were also studied, including the ultrasound power and time. Experimental results indicate that the ultrasound pretreatment can decompose large molecules of reactive brilliant red X-3B into small molecules by the cavity effect, facilitating the activated carbon adsorption. Meanwhile, the transport to micropores in activated carbon can be enhanced as a result of small molecular size, further improving the adsorption performance. It was found that the optimal ultrasound power was 320 W. High concentration reactive brilliant red X-3B required long ultrasound time, but the ultrasound pretreatment had no influence on the activated carbon adsorption once the ultrasound time reached a certain value. It was also found that although the ultrasound pretreatment did not affect the adsorption equilibrium, it could increase the saturated adsorption capacity of reactive brilliant red X-3B by activated carbon.