Adsorption of Nitrate by a Novel Polyacrylic Anion Exchange Resin from Water with Dissolved Organic Matters: Batch and Column Study

Applied Sciences

RajendraPrasad Singh¹  Xinchun Ding²  Yue Sun³  Weisheng Zheng³ 

[1] Yancheng Academy of Environmental Protection Technology and Engineering, Yancheng 224051, China;;Nanjing University &School of Civil Engineering, Southeast University, Nanjing 210096, China;

关键词: nitrate;    dissolved organic matter;    ion exchange;    selectivity;   

DOI  :  10.3390/app9153077

来源: DOAJ

【 摘 要 】

A novel anion exchange resin AEE-3 was synthesized by N-alkylation of a weakly basic polyacrylic anion exchanger D311 with 1-bromopropane to effectively remove nitrate (NO₃⁻-N) from aqueous solution. The related finding revealed that its adsorption isotherm obeyed the Langmuir model well, and the second-order model was more validated for the NO₃⁻-N adsorption kinetics study. Compared to commercially-available polystyrene-based nitrate specialty resin Purolite A 520E (A520E), AEE-3 resin has a higher adsorbed amount and better regeneration performance toward NO₃⁻-N in the existence of dissolved organic matter (DOM) using static and dynamic methods. Notably, a real secondary treated wastewater (STWW) obtained from a local municipal wastewater treatment plant was also assessed for NO₃⁻-N removal in fixed-bed columns. Observations from this study indicated that AEE-3 could effectively remove NO₃⁻-N from contaminated surface water.

【 授权许可】

Unknown