Removal Characteristics of Tanic Acid Adsorbed on MIEX Resin
Lei Ding, Yunhua Zhu, Bin Du, Jiangya Ma, Xinxi Zhang
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School of Civil Engineering and Architecture, Anhui University of Technology,
59 Hudong Road, Maanshan 243002, P.R. China
Submission date: 2016-06-05
Final revision date: 2016-09-26
Acceptance date: 2016-09-26
Online publication date: 2017-04-20
Publication date: 2017-05-26
Pol. J. Environ. Stud. 2017;26(3):1031–1043
This study evaluated the removal characteristics of tanic acid (TA) adsorbed on MIEX resin by batch experiments. MIEX resin can effectively remove TA from raw water at pH 6-9. Chloride and sulfate have adverse effect on the removal of TA. Conversely, bicarbonate can further the removal of TA. The Elovich model is the most suitable for depicting the kinetic process, and liquid film diffusion dominates the adsorption rate. The Freundlich model is reliable for describing the adsorption equilibrium. Adsorption is an endothermic, entropy-driving, and thermodynamically spontaneous process. The energy changes confirm the physical adsorption and dominate adsorption behavior. The sodium chloride solution (0.5%) can effectively regenerate the MIEX resin saturated TA, and the regenerated resin can be used circularly. Therefore, MIEX resin is a promising adsorbent for the removal of TA from raw water.