Study on the performance of K_(0.3)Ti_4O_(7.3)(OH)_(1.7) fiber in Li~+ recovery

摘要

This study aims to explore the potential use of fibrous K0.3Ti4O7(OH)1.7 (KTO(OH)) as adsorbent in the enrichment and segregation of Zabuye Salt Lake containing Li+. X-ray diffraction scanning (XRD), Brunauer-Emmett-Teller (BET), Fourier transform infra-red (FTIR) and scanning electron microscopy (SEM) were used to study the phase and morphological properties of KTO(OH). The results showed KTO(OH) was stable in space and had many adsorption sites, with 47.34-m2/g BET surface area. Adsorption capacity is 27.63 mg/g. In addition, pseudo-second-order kinetic model was fitted to verify its adsorption process. After repeating five times, the circulating adsorption capacity can still reach 91.67 of the initial adsorption capacity. The mass loss ratio of KTO(OH) was 0.85 and KTO(OH) shows excellent performance of environmental protection and pollution-free.