水溶液
吸附
钠
化学
铵
聚丙烯酸钠
氮气
丙烯酸酯
无机化学
核化学
化学工程
有机化学
聚合物
共聚物
原材料
工程类
作者
I-Chi Li,Yin-Hong Chen,Yung‐Chung Chen
标识
DOI:10.1016/j.jtice.2024.105516
摘要
Water is the most critical and essential component on Earth for meeting the daily needs of human beings. Ammonium nitrogen (NH4N) is a water pollutant that can significantly affect aquatic flora and fauna. In this study, a series of poly(sodium acrylate) (PANa)-based hydrogels containing various amount of eco-friendly sodium humate (SH) were designed for ammonium nitrogen adsorption. The interpenetrating polymer hydrogels (PASH-0.05, PASH-0.1, and PASH-0.15) were synthesized through thermal radical polymerization of neutral sodium acrylate (ANa) and SH in the presence of ammonium persulfate as an initiator. Additionally, poly(sodium acrylate) (PANa) without SH was prepared for comparison. The chemical structure, microstructure, thermal stability and water adsorption properties of the obtained hydrogels were comprehensively characterized. Finally, adsorption results and behavior under ammonium chloride solution were evaluated. The PASH-0.1 hydrogel, with a composition of 0.1 wt% SH, exhibited the highest ammonia nitrogen adsorption capacity (11.2 mg g−1), which was 5.2% higher than that of the PANa hydrogel (10.7 mg g−1) under similar testing conditions. Additionally, adsorption isotherm and kinetic analyses were investigated. Furthermore, the hydrogels demonstrated good stability and reusability, retaining more than 80% of the initial adsorption capacity after nine adsorption-desorption cycles.
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