Multilayer Structure Ammoniated Collagen Fibers for Fast Adsorption of Anionic Dyes

Wei Luo; Ruiyang Chi; Fanke Zeng; Yahan Wu; Yun Chen; Shuting Liu; Wei Lin; Huiting Lin; Xiaoxia Ye; Jie Chen

doi:10.1021/acsomega.1c03643

Multilayer Structure Ammoniated Collagen Fibers for Fast Adsorption of Anionic Dyes

ACS Omega. 2021 Oct 5;6(41):27070-27079. doi: 10.1021/acsomega.1c03643. eCollection 2021 Oct 19.

Authors

Wei Luo¹, Ruiyang Chi¹, Fanke Zeng¹, Yahan Wu¹, Yun Chen¹, Shuting Liu¹, Wei Lin¹, Huiting Lin¹, Xiaoxia Ye¹, Jie Chen²

Affiliations

¹ Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology, College of Environment & Safety Engineering, Fuzhou University, Minhou, Fujian 350108, PR China.
² College of Environment & Safety Engineering, Fuzhou University, Minhou, Fujian 350108, PR China.

Abstract

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^-1, 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^-1 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.