首页|Recycling of zinc oxide dust using ChCl-urea deep eutectic solvent with nitrilotriacetic acid as complexing agents
Recycling of zinc oxide dust using ChCl-urea deep eutectic solvent with nitrilotriacetic acid as complexing agents
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NSTL
Elsevier
The leaching of zinc from zinc oxide dust was investigated in choline chloride-urea deep eutectic solvent (ChClurea DES) with the addition of nitrilotriacetic acid (NTA). The effect of important parameters on leaching process, such as leaching temperature, leaching time, liquid/solid ratio and NTA concentration was investigated and the optimization was done using surface response methodology (RSM) based on central composite design (CCD). The optimum condition for leaching of zinc from zinc oxide dust was identified to be a leaching temperature of 79.0 degrees C, a leaching time of 35.4 h, a liquid/solid ratio of 12.1 and an NTA concentration of 0.07 mol/ L. A maximum of 87.9% of zinc was recovered under the optimum experimental conditions. The leaching process is controlled by diffusion and the corresponding activation energy is 26.2 kJ/mol. The resultant leaching solution was directly used for the electrodeposition of zinc, and pure zinc deposit is obtained.
NSTL
Elsevier
