Paczyńska Karolina, Jóźwiak Tomasz, Filipkowska Urszula
Department of Environmental Engineering, University of Warmia and Mazury in Olsztyn, Warszawska St. 117a, 10-957 Olsztyn, Poland.
Materials (Basel). 2023 Jun 25;16(13):4586. doi: 10.3390/ma16134586.
This study examined the effect of modifying Canadian goldenrod () biomass on its sorption capacity of Reactive Black 5 (RB5) and Reactive Yellow 84 anionic dyes. The scope of the research included the characteristics of sorbents (FTIR, elementary analysis, pH), the effect of pH on dye sorption efficiency, sorption kinetics, and the maximum sorption capacity (describing the data with Langmuir 1 and 2 and Freundlich models). FTIR analyses showed the appearance of amine functional groups in the materials modified with ammonia water, which is indicative of the sorbent amination process. The amination efficiency was higher in the case of materials pre-activated with epichlorohydrin, which was confirmed by elemental analysis and pH values. The sorption efficiency of RB5 and RY84 on the tested sorbents was the highest in the pH range of 2-3. The sorption capacity of the goldenrod biomass pre-activated with epichlorohydrin and then aminated with ammonia water was 71.30 mg/g and 59.29 mg/g in the case of RB5 and RY84, respectively, and was higher by 2970% and 2510%, respectively, compared to the unmodified biomass. Amination of biomass pre-activated with epichlorohydrin can increase its sorption capacity, even by several dozen times.
本研究考察了改性加拿大一枝黄花（）生物质对活性黑5（RB5）和活性黄84阴离子染料吸附能力的影响。研究范围包括吸附剂的特性（傅里叶变换红外光谱法、元素分析、pH值）、pH值对染料吸附效率的影响、吸附动力学以及最大吸附容量（用朗缪尔1和2模型以及弗伦德利希模型描述数据）。傅里叶变换红外光谱分析表明，在用氨水改性的材料中出现了胺官能团，这表明吸附剂发生了胺化过程。通过元素分析和pH值证实，在环氧氯丙烷预活化的材料中胺化效率更高。RB5和RY84在测试吸附剂上的吸附效率在pH值为2 - 3时最高。对于RB5和RY84，经环氧氯丙烷预活化然后用氨水胺化的一枝黄花生物质的吸附容量分别为71.30 mg/g和59.29 mg/g，与未改性生物质相比，分别高出2970%和2510%。用环氧氯丙烷预活化的生物质进行胺化可提高其吸附容量，甚至提高几十倍。
