Effects of Temperature and Carrier Gas on Phosphorus Transformation in Biosolids Biochar
Phosphorus (P) is an essential macronutrient for plants. The focus of this work is to recover P from biosolids and their derived biochar. The effect of three different pyrolysis temperatures (400 °C, 500 °C, and 600 °C) and two carrier gases (CO<sub>2</sub> and N<sub>2</sub>)...
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2024-12-01
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| author | Shefali Aktar Md Afzal Hossain Gabriel Gasco Ana Mendez Cicero Celio de Figueiredo Kalpit Shah Jorge Paz-Ferreiro |
| author_facet | Shefali Aktar Md Afzal Hossain Gabriel Gasco Ana Mendez Cicero Celio de Figueiredo Kalpit Shah Jorge Paz-Ferreiro |
| author_sort | Shefali Aktar |
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| description | Phosphorus (P) is an essential macronutrient for plants. The focus of this work is to recover P from biosolids and their derived biochar. The effect of three different pyrolysis temperatures (400 °C, 500 °C, and 600 °C) and two carrier gases (CO<sub>2</sub> and N<sub>2</sub>) on P fractionation and the speciation of P on biochars produced from two biosolids were investigated. The Hedley chemical sequential extraction method and <sup>31</sup>P liquid NMR were used for P characterization and quantification. Higher pyrolysis temperatures increased P fixation and decreased short-term P bioavailability. Carrier gas had also significant effects on P fractionation in the biochars. Biochar produced in a CO<sub>2</sub> environment had slightly higher water-soluble P, NaHCO<sub>3</sub>-P<sub>i</sub>, NaOH-P<sub>i</sub>, and residual P than in biochar prepared in a N<sub>2</sub> environment, while HCl-P showed the opposite trend. Additionally, the predominant molecular configuration of P was present in the inorganic form identified by <sup>31</sup>P liquid NMR spectra, while organic P transformed into inorganic P with increasing pyrolysis temperature. |
| format | Article |
| id | doaj-art-17d3294693c24c9986b0accda4e56a7a |
| institution | Kabale University |
| issn | 2073-445X |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
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| spelling | doaj-art-17d3294693c24c9986b0accda4e56a7a2024-12-27T14:35:14ZengMDPI AGLand2073-445X2024-12-011312213210.3390/land13122132Effects of Temperature and Carrier Gas on Phosphorus Transformation in Biosolids BiocharShefali Aktar0Md Afzal Hossain1Gabriel Gasco2Ana Mendez3Cicero Celio de Figueiredo4Kalpit Shah5Jorge Paz-Ferreiro6Chemical and Environmental Engineering, School of Engineering, RMIT University, Melbourne, VIC 3000, AustraliaDepartment of Fisheries Management, Hajee Mohammad Danesh Science and Technology University, Dinajpur 5200, BangladeshDepartment of Agricultural Production, Universidad Politécnica de Madrid, Ciudad Universitaria, 28040 Madrid, SpainDepartment of Geological and Mining Engineering, Universidad Politécnica de Madrid, 28040 Madrid, SpainFaculdade de Agronomia e Medicina Veterinária, Universidade de Brasília, Campus Universitário Darcy Ribeiro, Brasília 04508, DF, BrazilChemical and Environmental Engineering, School of Engineering, RMIT University, Melbourne, VIC 3000, AustraliaChemical and Environmental Engineering, School of Engineering, RMIT University, Melbourne, VIC 3000, AustraliaPhosphorus (P) is an essential macronutrient for plants. The focus of this work is to recover P from biosolids and their derived biochar. The effect of three different pyrolysis temperatures (400 °C, 500 °C, and 600 °C) and two carrier gases (CO<sub>2</sub> and N<sub>2</sub>) on P fractionation and the speciation of P on biochars produced from two biosolids were investigated. The Hedley chemical sequential extraction method and <sup>31</sup>P liquid NMR were used for P characterization and quantification. Higher pyrolysis temperatures increased P fixation and decreased short-term P bioavailability. Carrier gas had also significant effects on P fractionation in the biochars. Biochar produced in a CO<sub>2</sub> environment had slightly higher water-soluble P, NaHCO<sub>3</sub>-P<sub>i</sub>, NaOH-P<sub>i</sub>, and residual P than in biochar prepared in a N<sub>2</sub> environment, while HCl-P showed the opposite trend. Additionally, the predominant molecular configuration of P was present in the inorganic form identified by <sup>31</sup>P liquid NMR spectra, while organic P transformed into inorganic P with increasing pyrolysis temperature.https://www.mdpi.com/2073-445X/13/12/2132pyrolysistemperaturecarrier gasesCO<sub>2</sub>P speciation<sup>31</sup>P NMR |
| spellingShingle | Shefali Aktar Md Afzal Hossain Gabriel Gasco Ana Mendez Cicero Celio de Figueiredo Kalpit Shah Jorge Paz-Ferreiro Effects of Temperature and Carrier Gas on Phosphorus Transformation in Biosolids Biochar Land pyrolysis temperature carrier gases CO<sub>2</sub> P speciation <sup>31</sup>P NMR |
| title | Effects of Temperature and Carrier Gas on Phosphorus Transformation in Biosolids Biochar |
| title_full | Effects of Temperature and Carrier Gas on Phosphorus Transformation in Biosolids Biochar |
| title_fullStr | Effects of Temperature and Carrier Gas on Phosphorus Transformation in Biosolids Biochar |
| title_full_unstemmed | Effects of Temperature and Carrier Gas on Phosphorus Transformation in Biosolids Biochar |
| title_short | Effects of Temperature and Carrier Gas on Phosphorus Transformation in Biosolids Biochar |
| title_sort | effects of temperature and carrier gas on phosphorus transformation in biosolids biochar |
| topic | pyrolysis temperature carrier gases CO<sub>2</sub> P speciation <sup>31</sup>P NMR |
| url | https://www.mdpi.com/2073-445X/13/12/2132 |
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