@@ 1. Introduction Adsorption by activated carbon has been widely used as an effective technique for removing heavy metals from water or wastewater. To increase the resource utilization efficiency of activated carbon and to decrease the environmental risk of heavy metals, new technologies need to be developed. Microwave irradiation could be a promising method. Humic acid (HA) is ubiquitous in natural waters. In this study, microwave irradiation was adopted for the regeneration of Granular activated carbon (GAC) saturated with Cd2+, as well as for the immobilization of Cd2+ on GAC, and the effect of the presence of HA was systematically investigated.
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