| Title |
Hydroxyl-eggshell: A novel eggshell byproduct highly effective to recover phosphorus from aqueous solutions |
| ID_Doc |
23254 |
| Authors |
Ribeiro, ICA; Teodoro, JC; Guilherme, LRG; Melo, LCA |
| Title |
Hydroxyl-eggshell: A novel eggshell byproduct highly effective to recover phosphorus from aqueous solutions |
| Year |
2020 |
| Published |
|
| DOI |
10.1016/j.jclepro.2020.123042 |
| Abstract |
Efficient recovery and reuse systems are an ever-increasing challenge for global phosphorus security. This work presents a standard and straightforward methodology to produce a novel eggshell byproduct with a high P-recovery capacity. The material was obtained from chicken eggshells after reaction with hydrochloric acid and sodium hydroxide solutions and named as Hydroxyl-Eggshell (ES-OH). Batch experiments were conducted to investigate the effects of ES-OH doses, contact time, and initial P concentration on the recovery process. Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy with energy dispersive X-ray spectrometry (SEM-EDS), and X-ray diffraction (XRD) were used to characterize the material before and after P reaction. The kinetics study showed that the pseudosecond-order model described well the process. The maximum P recovery capacity was 328.9 mg g(-1), which is higher than that found for other materials derived from eggshells. FTIR, SEM-EDS, and XRD confirmed that the primary process of P recovered by ES-OH is via precipitation as hydroxyapatite. Finally, a pot experiment confirmed that the P-loaded ES-OH was as effective as triple superphosphate (TSP) on grass yield with the advantage of maintaining nearly four-fold more available P and higher soil pH than TSP after cultivation. The results presented in this work showed that ES-OH is a promising material for P recovery from aqueous solution, forming a material with great potential to be used in agriculture as an alternative phosphate fertilizer. (C) 2020 Elsevier Ltd. All rights reserved. |
| Author Keywords |
Hydroxyapatite; Waste valorization; Precipitates; Circular economy |
| Index Keywords |
Index Keywords |
| Document Type |
Other |
| Open Access |
Open Access |
| Source |
Science Citation Index Expanded (SCI-EXPANDED) |
| EID |
WOS:000579404800010 |
| WoS Category |
Green & Sustainable Science & Technology; Engineering, Environmental; Environmental Sciences |
| Research Area |
Science & Technology - Other Topics; Engineering; Environmental Sciences & Ecology |
| PDF |
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