Engenheiros da Columbia criam método mais rápido para extrair lítio

Pesquisadores da Columbia Engineering desenvolveram uma nova técnica para extrair lítio de salmouras subterrâneas de forma mais rápida e com menos impacto ambiental. A abordagem utiliza um solvente sensível à temperatura e evita as grandes lagoas de evaporação comuns na produção atual.

O método, chamado extração seletiva por solvente comutável (S3E, na sigla em inglês), funciona absorvendo lítio e água de salmouras em temperatura ambiente. O aquecimento do solvente libera então o lítio purificado, permitindo que o material seja reutilizado. Os testes mostraram taxas de extração até 10 vezes maiores para o lítio do que para o sódio e 12 vezes maiores do que para o potássio.

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