Published Dec 30, 2019 on Dryad.
Cite this dataset
Luo, Ying et al. (2019). Preparation and regeneration of iron-modified nanofibres for low-concentration phosphorus-containing wastewater treatment [Dataset]. Dryad. https://doi.org/10.5061/dryad.c53m9d5
In this study, nanocellulose (CNFs) was prepared by a mechanical shearing method, a simple and pollution-free process. Iron hydroxide was loaded on nanocellulose, a natural macromolecule derived from bamboo, to produce the second generation iron-loaded nanocellulose for the removal of low-concentration phosphorus from wastewater. We found that the best modified ferric salt was ferric chloride. When the mass ratio of Fe(OH)3 and CNFs was 1.5:1, freeze-drying with liquid nitrogen yielded the best adsorption performance. The adsorption process of Fe(OH)3@CNFs followed the pseudo-second-order kinetics and belonged to chemical adsorption. Regeneration experiments showed that after 10 cycles of adsorption-regenerations of the adsorbent, the phosphorus adsorption efficiency was still stable at 80 % of the initial material. Thepreparedadsorbentwascharacterizedby theBETsurfacearea measurement,scanningelectronmicroscopyandFT-IR. The surface morphology, pore size and elements of materials before and after iron loading were analyzed. Compared with other adsorbents, the phosphorus removal performances of the second generation iron-loaded nanocellulose were superior. Compared with the first generation material, the second generation adsorbent is simpler and more environmentally friendly.
Infrared spectrum of CNFs before and after modification,Phosphorus removal effect of CNFs and Fe(OH)3@CNFs under different pH conditions,Phosphorus removal effect of different concentrations of Fe(OH)3@CNFs after freezing in refrigerator and liquid nitrogen,Phosphorus removal effect of the second generation iron-loaded nanocellulose
modified by different Fe(OH)3 and CNFs mass ratio,Sorption kinetics of phosphate on Fe(OH)3@CNFs,Effect of NaOH concentration on desorption,Effect of regeneration times on adsorption efficiency of the second-generation iron-modified nanocellulose.
Science and Technology Major Projects of Sichuan Province ’Technology Integration and Demonstration of Stability and Standard Achievement in Urban Sewage Treatment Plant’, Award: 2019YFS0501