Facile fabrication of composite cellulose fibrous materials for efficient and consecutive dyeing wastewater treatment

Dandan Xie; Qiuxia Fu; Yue Wang; Jianlong Ge; Hailou Wang; Yu Zhang; Wei Zhang; Haoru Shan

doi:10.1039/d2ra03460c

Facile fabrication of composite cellulose fibrous materials for efficient and consecutive dyeing wastewater treatment

RSC Adv. 2022 Sep 28;12(42):27616-27624. doi: 10.1039/d2ra03460c. eCollection 2022 Sep 22.

Authors

Dandan Xie¹, Qiuxia Fu^{1

2}, Yue Wang¹, Jianlong Ge^{1

2}, Hailou Wang^{1

2}, Yu Zhang^{1

2}, Wei Zhang^{1

2}, Haoru Shan^{1

2}

Affiliations

¹ College of Textile and Clothing, Nantong University Nantong Jiangsu 226019 China fuqx@ntu.edu.cn zhangwei@ntu.edu.cn hrshan@ntu.edu.cn.
² National & Local Joint Engineering Research Center of Technical Fiber Composites for Safety and Health, Nantong University Nantong Jiangsu 226019 China.

Abstract

Fabricating dye adsorbents with efficient adsorption properties is of great significance in the treatment of printing and dyeing wastewater. Herein, composite materials of polydopamine decorated cellulose fibrous nonwovens (PDA@CF NWs) were fabricated by constructing a PDA functional layer on the surface of cellulose fibers via in situ polymerization. In addition, a three-dimensional adsorbent of 3D PDA@CF NWs with good hydrophilicity, structural stability, and compression resistance could be obtained using a facilely laminating and traditional loop bonding reinforcing technique. Attributed to the efficient and uniform loading of an active PDA functional layer, the resulting PDA@CF NWs exhibited a relatively large adsorption capacity of around 91 mg g^-1 towards the template dye of methylene blue within a fast equilibrium time of 2 h, which was superior to most of the fibrous adsorbents. In addition, the treatment column of 3D PDA@CF NWs exhibited a breakthrough capacity of 40.9 mg g^-1, reaching nearly 50% of the static saturated dye-binding capacity. More importantly, the 3D PDA@CF NWs column could effectively and continuously separate the mixture of different dyes under gravity, highlighting an excellent practical performance. Thus, the PDA@CF NWs are expected to provide a promising candidate for environment-friendly, large-scale and efficient treatment of industrial printing and dyeing wastewater.