| Issue |
E3S Web Conf.
Volume 350, 2022
International Conference on Environment, Renewable Energy and Green Chemical Engineering (EREGCE 2022)
|
|
|---|---|---|
| Article Number | 03001 | |
| Number of page(s) | 6 | |
| Section | Green Chemical Engineering | |
| DOI | https://doi.org/10.1051/e3sconf/202235003001 | |
| Published online | 09 May 2022 | |
Preparation and Application of Nano-structured Lead Dioxide from Waste Lead Slag
1
School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
2
Hubei HuaDeLai (HDL) Co. Ltd, Wuhan, 430079, China
* Corresponding author: profxuwu@hust.edu.cn.
To develop an efficient and green method to recycling lead slag, a novel strategy to fabricate nano-lead dioxide from lead slag was applied by the hydro-electrometallurgy. In leaching system, the optimum condition of leaching time 100 min, 80 °C, stirring rate 500 rpm, liquid/solid ratio 20 and 1 mol/L methanesulfonic acid resulted in lead recovery of 89% and residue obtained without toxicity. The kinetic study revealed that the methanesulfonic acid leaching of lead slag shows good agreement with a diffusion-controlled shrinking-particle model. Additionally, the apparent activation energy of MSA leaching of lead slag was determined using Arrhenius model as 13.621 kJ/mol. Furthermore, Nano-PbO2 recovered from waste lead paste was prepared for the electrolysis of water to produce ozone. The experimental results showed that the ozone production of nano-PbO2 recovered from waste lead slag was not significantly different from the nano-PbO2 prepared by pure reagents. In conclusion, waste lead slag can be recycled for the fabrication of nano-PbO2, which has a significant advantage on realizing the recycling of lead resources.
© The Authors, published by EDP Sciences, 2022
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