2015-Sustainable Industrial Processing Summit
SIPS 2015 Volume 10: Mineral & Secondary Battery
| Editors: | Kongoli F, Silva AC, Arol AI, Kumar V, Aifantis K |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2015 |
| Pages: | 340 pages |
| ISBN: | 978-1-987820-33-1 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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The Effect of Alkalescency Reagents-Ammonia on Leaching of Spent Lead Pastes Based on Citric Acid Method
Jiakuan Yang1; Wei Zhang1; Yuchen Hu1; Wenhao Yu1; Jinxin Dong1; Junxiong Wang1; Mingyang Li1; Vasant Kumar2;1HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY (HUST), Wuhan, China; 2UNIVERSITY OF CAMBRIDGE, Cambridge, United Kingdom (Great Britain);
Type of Paper: Regular
Id Paper: 277
Topic: 14
Abstract:
The effect of using ammonia based reagent was investigated in the newly developed citric acid hydrometallurgical method for recycling spent lead-acid batteries. The pH of leaching solution was adjusted with varying additions of ammonia, while monitoring the observed change in temperature. The desulphurization ratio of spent lead paste reached up to 90%, with the addition of 20 wt% ammonia for a reaction time of 1 h. The effect of experimental factors, mole ratio of citric acid to lead, leaching time, leaching temperature, initial solution pH on desulphurization efficiency of spent lead paste were studied. The XRD patterns of the crystals formed after leaching were studied whose chemical formula was shown to be Pb(C6H6O7)*H2O at a pH of 3.3 and Pb3(C6H5O7)2*3H2O at a pH of 6.2. The crystal structure of the lead citrate crystal was also studied using the single crystal method. The crystals obtained at different pH crystallize in the triclinic crystal system, with space group P-1. This attractive study shed light on the recycling of spent lead paste via this new method.
Keywords:
Pollution; Recycling; SecondaryBattery; Technology;References:
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