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Preparation and regeneration of iron-modified nanofibres for low-concentration phosphorus-containing wastewater treatment.

ABSTRACT: 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. The prepared adsorbent was characterized by the BET surface area measurement, scanning electron microscopy and FT-IR. The surface morphology, pore size and elements of materials before and after iron loading were analysed. 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.

SUBMITTER: Luo Y

PROVIDER: S-EPMC6774935 | biostudies-literature | 2019 Sep

REPOSITORIES: biostudies-literature

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Preparation and regeneration of iron-modified nanofibres for low-concentration phosphorus-containing wastewater treatment.

Luo Ying Y Liu Min M Chen Ying Y Wang Tingting T Zhang Wei W

Royal Society open science 20190904 9

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)<sub>3</sub> and CNFs was 1.5 : 1, freeze-drying with liquid nitrogen yiel ...[more]

PMID: 31598304

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Preparation and regeneration of iron-modified nanofibres for low-concentration phosphorus-containing wastewater treatment.

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Preparation and regeneration of iron-modified nanofibres for low-concentration phosphorus-containing wastewater treatment.

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