Luo Wei, Chi Ruiyang, Zeng Fanke, Wu Yahan, Chen Yun, Liu Shuting, Lin Wei, Lin Huiting, Ye Xiaoxia, Chen Jie
Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology, College of Environment & Safety Engineering, Fuzhou University, Minhou, Fujian 350108, PR China.
College of Environment & Safety Engineering, Fuzhou University, Minhou, Fujian 350108, PR China.
ACS Omega. 2021 Oct 5;6(41):27070-27079. doi: 10.1021/acsomega.1c03643. eCollection 2021 Oct 19.
Dye wastewater has become one of the difficult industrial wastewaters due to its significant characteristics such as high chroma and poor biodegradability. Here, we use collagen fibers (CFs) as the matrix, glutaraldehyde as the cross-linking agent, and polyethyleneimine (PEI) as the ammoniating modifier to prepare cationic-modified collagen fibers (CF-PEI). The CF-PEI still maintained the original fibrous structure with a larger adsorption area. The content of primary amino groups on CF-PEI was significantly increased, which not only improved the hydrophilic swelling performance of CFs but also improved the adsorption capacity. The adsorption capacity of CF-PEI for soap yellow and acid red could reach 538.2 and 369.7 mg g, respectively. The adsorption rate was fast, and the adsorption equilibrium could be reached in about 60 min. Desorption regeneration studies have shown that 0.1 mol L HCl could achieve a better desorption effect, and the CF-PEI had a good recycling performance. The ammoniated modified CF-PEI was an excellent adsorption treatment material for anionic dye wastewater. It is expected to become an effective way for high-value resource utilization of waste dander in the leather industry.
印染废水因其色度高、可生物降解性差等显著特点，已成为难处理的工业废水之一。在此，我们以胶原纤维（CFs）为基质，戊二醛为交联剂，聚乙烯亚胺（PEI）为胺化改性剂，制备阳离子改性胶原纤维（CF-PEI）。CF-PEI仍保持原有纤维结构，具有较大的吸附面积。CF-PEI上伯氨基的含量显著增加，这不仅提高了CFs的亲水性溶胀性能，还提高了吸附容量。CF-PEI对皂黄和酸性红的吸附容量分别可达538.2和369.7 mg/g。吸附速率快，约60 min即可达到吸附平衡。解吸再生研究表明，0.1 mol/L HCl可取得较好的解吸效果，CF-PEI具有良好的循环性能。胺化改性的CF-PEI是一种优良的阴离子染料废水吸附处理材料。有望成为皮革行业废弃物高值化利用的有效途径。
