Extraction of Cu2+ from wastewater in a novel spiral microchannel

Abstract

To effectively remove Cu2+ from wastewater, the extraction process of Cu2+ in a novel spiral microchannel was studied in this work. The effect of operating parameters and equipment structure parameters on Cu2+ extraction was systematically investigated, and the effect of various parameters on the extraction process were compared by parameter fitting. The synergistic enhancement of spiral flow field and ultrasonic field was studied and compared with other microchannel extraction of Cu2+. Under the optimum conditions of small curvature, small inner diameter, long tube length and low pitch, the extraction rate of Cu2+ reaches the equilibrium extraction rate of 73.99 %, the overall volumetric mass transfer coefficient can reach 4.36 s−1, and the space-time yield can reach 23761 L/(L·h). Compared with other devices, the overall volumetric mass transfer coefficient and space-time yield have been improved by an order of magnitude, proving the high efficiency of Cu2+ extraction in the spiral microchannel. This study has guiding significance for the efficient extraction of Cu2+ in microchannel and the design of microchannel structure.