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

Abstract

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.

Research progress in the treatment of anionic pollutants in wastewater

“…废水中阴离子类型的污染物主要分为无机阴离子 型污染物 [10] 和有机阴离子型污染物 [11] . 无机阴离子污 染物(主要包括重铬酸盐 [12] 、砷酸盐 [13] 、硝酸盐 [14] 、 高氯酸盐 [15] 、硒酸盐 [16] 等)广泛存在于废水中, 且对人 类及生态环境存在严重的危害. 例如, 硝酸盐(NO 3 − )、 磷酸盐(PO 4 3− )会使水体富营养化, 人体过量摄入会引 起高铁血红蛋白症 [17] ; 水体中的Cr(VI)以Cr 2 O 7 2− 阴离 子的形式存在, 其难以通过富集降解, 且比处理其他 污染物更困难, 人体吸入或接触皮肤会对肾脏和肝脏 造成危害 [18] ; 高氯酸盐会影响人体内甲状腺吸收碘, 从而影响成人的新陈代谢和婴幼儿的正常生长 [19] ; 砷 酸盐具有强生物毒性, 可致使植物营养生长不良 [20] , 进入人体会影响细胞的正常代谢 [21] .…”

Monitoring and Management of Anions in Polluted Aqua Systems: Case Studies on Nitrate, Chromate, Pertechnetate and Diclofenac

“…95.5 mg/g was observed between pH 5.2 and 8.8. Using a related approach, Sun et al [138] synthesized gel adsorbents from an alkylammonium acrylate that are able to remove nitrate from real secondary treated waste water.…”

Nitrate removal from aqueous solutions with sodium alginate/quaternary branched polyethylenimine/carboxylated multi-wall carbon nanotube

“…Anionic exchange resins treat wastewater by removing nitrate, phosphate, reactive dyes, and other anionic contaminants by a combination of surface area, quaternary amine groups, and a very straightforward mechanism. Several studies have been conducted on the removal of nitrate from drinking water using various ion exchange resins [13], for example, polyethylenimine functionalized polyacrylonitrile anion exchange fiber [14], and modified polyacrylic anion exchange resin such as N-alkylation of a weakly basic polyacrylic anion exchanger D311 with 1-bromopropane, for effective nitrate removal from aqueous solutions [15]. These methods, however, face several challenges, including high costs and low reusability.…”