College of Environment, Zhejiang University of Technology, Hangzhou, 310014, China; Beijing Key Lab for Source Control Technology of Water Pollution, Engineering Research Center for Water Pollution Source Control & Eco-remediation, College of Environmental Science & Engineering, Beijing Forestry University, Beijing, 100083, China.
College of Environment, Zhejiang University of Technology, Hangzhou, 310014, China.
Environ Res. 2024 Apr 15;247:118245. doi: 10.1016/j.envres.2024.118245. Epub 2024 Jan 18.
Recovering waste NH to be used as a source of nitrogen fertilizer or liquid fuel has recently attracted much attention. Current methods mainly utilize activated carbon or metal-organic frameworks to capture NH, but are limited due to low NH adsorption capacity and high cost, respectively. In this study, novel porous materials that are low cost and easy to synthesize were prepared as NH adsorbents by precipitation polymerization with acid optimization. The results showed that adsorption sites (‒COOH, -OH, and lactone) which form chemical adsorption or hydrogen bonds with NH were successfully regulated by response surface methods. Correspondingly, the dynamic NH adsorption capacity increased from 5.45 mg g to 129 mg g, which is higher than most known activated carbon and metal-organic frameworks. Separation performance tests showed that NH could also be separated from CO and CH. The findings in this study will advance the industrialization of NH polymer adsorbents and provide technical support for the recycling of waste NH.
最近，回收废 NH 并将其用作氮肥或液体燃料的源受到了广泛关注。目前的方法主要利用活性炭或金属-有机骨架来捕获 NH，但由于 NH 吸附容量低和成本高而受到限制。在这项研究中，通过酸优化沉淀聚合制备了新型低成本、易于合成的多孔材料作为 NH 吸附剂。结果表明，通过响应面方法成功调节了与 NH 形成化学吸附或氢键的吸附位（‒COOH、-OH 和内酯）。相应地，动态 NH 吸附容量从 5.45mg/g 增加到 129mg/g，高于大多数已知的活性炭和金属-有机骨架。分离性能测试表明，NH 也可以从 CO 和 CH 中分离出来。本研究的结果将推动 NH 聚合物吸附剂的工业化，并为废 NH 的回收提供技术支持。
Zotero 插件