Zr-doped titanium lithium ion sieve and EP-granulated composite: Superb adsorption and recycling performance

Lithium ion sieve (LIS) has attracted great attention due to its high adsorption selectivity towards Li+. Herein, a new type of Zr-doped Ti-LIS (HZrTO) was synthesized by a simple calcination method. The adsorption capacity increased from 56.3 mg g−1 (before doping) to 93.2 mg g−1 after doping in LiOH solution (lithium 1.8 g L−1). The adsorption isotherm and adsorption kinetics of HZrTO accord with the Langmuir isotherm and the pseudo-second-order kinetic equation, respectively. Batch experiments showed that HZrTO has good stability and selectivity. In addition, HZrTO was granulated via epoxy resin (E-12), and the obtained granular adsorbent showed good adsorption capacity, excellent stability and high selectivity towards Li+.