LIFSI WASTEWATER TREATMENT METHOD

A LiFSI wastewater treatment method, comprising the following steps: adsorption: using resin to adsorb LiFSI wastewater to obtain LiFSI-adsorbed resin; desorption: washing the LiFSI-adsorbed resin by using alkali liquor to obtain a LiFSI desorption solution; concentration: heating and concentrating the LiFSI desorption solution to obtain a lithium-containing concentrated solution; neutralization: adding an acid into the lithium-containing concentrated solution for neutralization to obtain a neutralized solution; and lithium precipitation: adding carbonate and/or carbon dioxide into the neutralized solution for reaction to obtain a carbonate precipitate. The above method solves the problems that FSI- cannot be decomposed and is present in large amounts in existing wastewater treatment processes, and can fully recycle lithium resources, thus being more environment-friendly and achieving high economic benefit. L'invention concerne un procédé de traitement des eaux usées de LiFSI, comprenant les étapes suivantes