Facile synthesis of copper-substituted Prussian blue analog immobilized ion exchange resins for high-performance ammonium recovery from wastewater: Adsorption kinetics, isotherms, and regeneration

被引：21

作者：

Kang, Sungwon ^{[1
]}

Lee, Bongjae ^{[1
]}

Ahn, Kwang-Ho ^{[1
]}

Im, Seongwon ^{[1
]}

Kim, Bokseong ^{[2
]}

Kim, Tae-Hyun ^{[2
]}

Hwang, Yuhoon ^{[2
]}

Chae, Soryong ^{[3
]}

机构：

[1] Korea Inst Civil Engn & Bldg Technol, Dept Environm Res, 283 Goyang daero, Goyang Si 10223, Gyeonggi Do, South Korea

[2] Seoul Natl Univ Sci & Technol, Dept Environm Engn, 232 Gongneung ro, Seoul 01811, South Korea

[3] Univ Cincinnati, Dept Chem & Environm Engn, 2901 Woodside Dr, Cincinnati, OH 45221 USA

来源：

CHEMICAL ENGINEERING JOURNAL | 2023年 / 457卷

关键词：

Ammonium adsorption; Copper hexacyanoferrate; Prussian blue analog; Weakly acidic cation exchange resin; Regeneration; NITROGEN REMOVAL; AQUEOUS-SOLUTION; METAL-IONS; FERTILIZATION; EQUILIBRIUM; BACTERIA; SORPTION; ZEOLITE; ANAMMOX; OXIDES;

D O I：

10.1016/j.cej.2022.141128

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Ammonium is one of the major pollutants in aquatic environments, resulting in eutrophication, ammonia gas emission, and soil acidification. In this study, a facile synthesis procedure was developed for preparing high-performance ammonium adsorbent via in-situ immobilization of Prussian blue analog, viz. copper hex-acyanoferrate (CuHCF) on a weakly acidic cation exchange resin (WAC) without any pretreatment. From the analysis of physicochemical properties of the synthesized CuHCF-based adsorbents using powder X-ray diffrac-tometry, Fourier-transform infrared attenuated total-reflectance spectroscopy, scanning electron microscopy, thermogravimetric analysis, and X-ray photoelectron spectroscopy, it was found that CuHCF appears to be located on the surface of WAC, allowing access to NH4+ for adsorption. The pseudo-second-order kinetics model fits best suggesting that the adsorption of ammonium occurring was chemisorption. The isotherm model that fit best was the Langmuir isotherm, which showed that the maximum equilibrium adsorption capacity was 47.07 mg NH4+ per g of WAC-CuHCF at pH 6.5. The adsorption efficiency of NH4+ changed slightly in the presence of Na+ and decreased by only similar to 10 % in the presence of K+. The ability of WAC-CuHCF to regenerate was also assessed in the column test, and the regenerated adsorbent was found to adsorb and desorb NH4+ to essentially the same extent. Thus, WAC-CuHCF developed in this study, which could be prepared in a facile synthesis method, is promising as a regenerative adsorbent material for the selective adsorption of NH4+ ions over a wide pH range and can be applied for wastewater treatment and environmental remediation.

引用

页数：12