Preparation and regeneration of iron-modified nanofibres for low-concentration phosphorus-containing wastewater treatment
Luo, Ying et al. (2019), Preparation and regeneration of iron-modified nanofibres for low-concentration phosphorus-containing wastewater treatment, v2, Dryad, Dataset, 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.
Science and Technology Major Projects of Sichuan Province ’Technology Integration and Demonstration of Stability and Standard Achievement in Urban Sewage Treatment Plant’,