Sr²⁺ sorption property of seaweed-like sodium titanate mats: effects of crystallographic properties

Abstract

Seaweed-like sodium titanate mats (SSTs) have excellent sorption capacity of Sr2+ compared to sodium trititanate monodispersed nanofibers due to the sodium dititanate structure and its unique nano/micro-scale morphologies.

Selective strontium adsorption using synthesized sodium titanate in aqueous solution

“…This ion-exchange model between Na and Sr was observed in other studies of Sr adsorption using titanate nanorods and mats. 50,56 SEM observations of ST2 aer Sr adsorption detected cube-shaped crystals which are quite similar in shape to SrTiO 3 crystals as an evidence for Sr adsorption on ST2 via surface precipitation. 57,58 4 Conclusions Sodium titanate ST2 (Na 0.56 H 1.44 TiO 3 ) was synthesized using a modied mid-temperature sol-gel method.…”

“…49 The maximum Sr adsorption capacity obtained by Langmuir isotherm model was compared with other synthetic adsorbents that were reported for candidates of Sr adsorption. 10,25,43,50 ST2 has the highest Sr adsorption capacity among synthetic adsorbents that include sodium titanate species under the condition that Sr and Cs co-exist in aqueous solution, while other studies were conducted using aqueous solution that contains only Sr (Table 3).…”