Adsorption-coupled reduction of bromate by Fe(II)-Al(III) layered double hydroxide in fixed-bed column: Experimental and breakthrough curves analysis

摘要

In this study, the bromate removal was investigated in continuous fixed-bed column using Fe(II)-Al(III) layered double hydroxide (LDH). With increase of column bed depth from 1.0 to 3.0 cm, breakpoint time (t(b)) increased from 51 to 175 h while throughput volume raised from 12.24 to 42.00 L at breakthrough point. The bromate removal was attributed to the reduction of Fe(II) present in LDH. The breakthrough curve was simulated well by Thomas model, but BDST model was the only effective to initial part (1-10%). The maximum removal capacity (N-0) calculated by Thomas model reached 71.01 mu mol/g at flow rate (3 mL/min). (C) 2015 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.