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Lithium and its impact on the environment in lithium battery cell failures
 Linney, Phillip George ; Doležalová Weissmannová, Helena (referee) ; Komendová, Renata (advisor)
This bachelor thesis deals with the study of the release of alkali metals and selected heavy metals from battery cells into firefighting water. The battery samples were prepared by superheating them with subsequent explosion and then leaching in distilled water. The change in pH and conductivity compared to distilled water was monitored after a specified time. Flame emission spectrometry and ICP-MS were used to measure elemental concentrations. The measured values of metal contents in aqueous extracts of the battery samples burned in air were compared with those of the samples exploded under water. Some differences were found. A concentration sequence was found for the extracts of the air-burned battery samplesLi+ >> K+ > Na+, whereas for the samples of extracts of batteries burnt in water the concentration sequence Li+ >> Na+ > K+ was found. The concentrations of Na+ ions were around 12.7 mg/l for the samples exploded under water and 275 mg/l thereafter. The K+ concentration was around 19 mg/l for both sample types. Lithium ions were determined the most of all elements measured, averaging 1500 mg/l for air-burned samples and 8200 mg/l for underwater exploded samples. Higher concentrations of Fe, Ni, Cu, Mn and Co were found in the ICP-MS measurements depending on the composition of the battery sample.
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