Adsorption of boron using glucamine-based chelate adsorbents Original Research Article

Adsorption of boron was investigated using glucamine-based chelate adsorbents, including resin type (Diaion® CRB 03 and Diaion® CRB 05) and a fiber type (Chelest Fiber® GRY-HW) adsorbents. The adsorption rate of boron was pseudo-second-order in all cases, with the Chelest Fiber having the highest adsorption rate. The adsorption of boron increased with pH in the acidic region but decreased with pH in the alkaline region. The adsorption isotherms obtained were of the Langmuir type and the order of the maximum adsorption was CRB 05 ≈ Chelest Fiber > CRB 03. The Chelest Fiber therefore has both a high adsorption rate and a high adsorption capacity for boron. Chromatographic recovery of boron can be achieved with CRB 05 and Chelest Fiber. The Chelest Fiber can adsorb boron at a high flow rate, with a space velocity of 25 h− 1. The effective adsorption–elution processing of boron from salt lake brine was achieved, although the adsorption rate and elution yield of boron were slightly decreased by components coexisting in the brine.