Cargando…
Recovery of Phosphorus From Swine Manure by Ultrasound/H(2)O(2) Digestion, Struvite Crystallization, and Ferric Oxide Hydrate/Biochar Adsorption
Swine manure is potentially harmful to the environment but is also a readily accessible local source of phosphorus (P) for agricultural use. Decreasing the environmental impact of swine manure and recovering P from swine manure have been a challenge for a long time. In this study, an integrated proc...
Autores principales: | , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Frontiers Media S.A.
2018
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6187983/ https://www.ncbi.nlm.nih.gov/pubmed/30349816 http://dx.doi.org/10.3389/fchem.2018.00464 |
_version_ | 1783363131355955200 |
---|---|
author | Zhang, Tao Wang, Qiming Deng, Yaxin Jiang, Rongfeng |
author_facet | Zhang, Tao Wang, Qiming Deng, Yaxin Jiang, Rongfeng |
author_sort | Zhang, Tao |
collection | PubMed |
description | Swine manure is potentially harmful to the environment but is also a readily accessible local source of phosphorus (P) for agricultural use. Decreasing the environmental impact of swine manure and recovering P from swine manure have been a challenge for a long time. In this study, an integrated process involving ultrasound/H(2)O(2) digestion, struvite crystallization, and ferric oxide hydrate (HFO)/biochar adsorption was used to recover P from swine manure. The ultrasound/H(2)O(2) treatment effectively solubilized the swine manure and converted organic P and other sparingly soluble P species into soluble phosphate. The struvite crystallization process allowed 85% of the available P to be recovered at pH 10.0 using a Mg:P molar ratio of 1.4 and a stirring rate of 150 rpm. HFO was loaded onto biochar synthesized by pyrolyzing ground corncob. The mechanism through which P was adsorbed was investigated by X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy. The adsorption of P by the HFO/biochar followed pseudo-second-order kinetics and was primarily controlled by chemical processes. The maximum amounts of P adsorbed were 225.08–242.21 mg/g. Thermodynamic calculations indicated that the adsorption of P was endothermic and spontaneous and increased the degree of disorder in the overall system. P mass balance calculations indicated that 90.4% of the total P was recovered as struvite and P-saturated HFO/biochar. |
format | Online Article Text |
id | pubmed-6187983 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Frontiers Media S.A. |
record_format | MEDLINE/PubMed |
spelling | pubmed-61879832018-10-22 Recovery of Phosphorus From Swine Manure by Ultrasound/H(2)O(2) Digestion, Struvite Crystallization, and Ferric Oxide Hydrate/Biochar Adsorption Zhang, Tao Wang, Qiming Deng, Yaxin Jiang, Rongfeng Front Chem Chemistry Swine manure is potentially harmful to the environment but is also a readily accessible local source of phosphorus (P) for agricultural use. Decreasing the environmental impact of swine manure and recovering P from swine manure have been a challenge for a long time. In this study, an integrated process involving ultrasound/H(2)O(2) digestion, struvite crystallization, and ferric oxide hydrate (HFO)/biochar adsorption was used to recover P from swine manure. The ultrasound/H(2)O(2) treatment effectively solubilized the swine manure and converted organic P and other sparingly soluble P species into soluble phosphate. The struvite crystallization process allowed 85% of the available P to be recovered at pH 10.0 using a Mg:P molar ratio of 1.4 and a stirring rate of 150 rpm. HFO was loaded onto biochar synthesized by pyrolyzing ground corncob. The mechanism through which P was adsorbed was investigated by X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy. The adsorption of P by the HFO/biochar followed pseudo-second-order kinetics and was primarily controlled by chemical processes. The maximum amounts of P adsorbed were 225.08–242.21 mg/g. Thermodynamic calculations indicated that the adsorption of P was endothermic and spontaneous and increased the degree of disorder in the overall system. P mass balance calculations indicated that 90.4% of the total P was recovered as struvite and P-saturated HFO/biochar. Frontiers Media S.A. 2018-10-08 /pmc/articles/PMC6187983/ /pubmed/30349816 http://dx.doi.org/10.3389/fchem.2018.00464 Text en Copyright © 2018 Zhang, Wang, Deng and Jiang. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. |
spellingShingle | Chemistry Zhang, Tao Wang, Qiming Deng, Yaxin Jiang, Rongfeng Recovery of Phosphorus From Swine Manure by Ultrasound/H(2)O(2) Digestion, Struvite Crystallization, and Ferric Oxide Hydrate/Biochar Adsorption |
title | Recovery of Phosphorus From Swine Manure by Ultrasound/H(2)O(2) Digestion, Struvite Crystallization, and Ferric Oxide Hydrate/Biochar Adsorption |
title_full | Recovery of Phosphorus From Swine Manure by Ultrasound/H(2)O(2) Digestion, Struvite Crystallization, and Ferric Oxide Hydrate/Biochar Adsorption |
title_fullStr | Recovery of Phosphorus From Swine Manure by Ultrasound/H(2)O(2) Digestion, Struvite Crystallization, and Ferric Oxide Hydrate/Biochar Adsorption |
title_full_unstemmed | Recovery of Phosphorus From Swine Manure by Ultrasound/H(2)O(2) Digestion, Struvite Crystallization, and Ferric Oxide Hydrate/Biochar Adsorption |
title_short | Recovery of Phosphorus From Swine Manure by Ultrasound/H(2)O(2) Digestion, Struvite Crystallization, and Ferric Oxide Hydrate/Biochar Adsorption |
title_sort | recovery of phosphorus from swine manure by ultrasound/h(2)o(2) digestion, struvite crystallization, and ferric oxide hydrate/biochar adsorption |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6187983/ https://www.ncbi.nlm.nih.gov/pubmed/30349816 http://dx.doi.org/10.3389/fchem.2018.00464 |
work_keys_str_mv | AT zhangtao recoveryofphosphorusfromswinemanurebyultrasoundh2o2digestionstruvitecrystallizationandferricoxidehydratebiocharadsorption AT wangqiming recoveryofphosphorusfromswinemanurebyultrasoundh2o2digestionstruvitecrystallizationandferricoxidehydratebiocharadsorption AT dengyaxin recoveryofphosphorusfromswinemanurebyultrasoundh2o2digestionstruvitecrystallizationandferricoxidehydratebiocharadsorption AT jiangrongfeng recoveryofphosphorusfromswinemanurebyultrasoundh2o2digestionstruvitecrystallizationandferricoxidehydratebiocharadsorption |