Nitrate Absorption and Desorption by Biochar
Biochar is a potential solution for addressing environmental problems related to excessive nitrogen (N). However, there is still some debate about the absorption and desorption of nitrate nitrogen (NO<sub>3</sub><sup>−</sup>-N). Therefore, this study investigated the NO<su...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-09-01
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| Series: | Agronomy |
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| Online Access: | https://www.mdpi.com/2073-4395/13/9/2440 |
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| author | Zijian He Chao Wang Hongxia Cao Jiaping Liang Shuyao Pei Zhijun Li |
| author_facet | Zijian He Chao Wang Hongxia Cao Jiaping Liang Shuyao Pei Zhijun Li |
| author_sort | Zijian He |
| collection | DOAJ |
| description | Biochar is a potential solution for addressing environmental problems related to excessive nitrogen (N). However, there is still some debate about the absorption and desorption of nitrate nitrogen (NO<sub>3</sub><sup>−</sup>-N). Therefore, this study investigated the NO<sub>3</sub><sup>−</sup>-N adsorption and desorption performance onto biochar and biochar-soil mixture to address this gap. The results showed that the biochar produced from apple branches had the ability to absorb NO<sub>3</sub><sup>−</sup>-N with an absorption capacity of 3.51 mg·g<sup>−1</sup>. The absorption data fitted well with the pseudo-second-order kinetic model and Langmuir model. The application of biochar significantly improved soil absorption capacity and slow release of NO<sub>3</sub><sup>−</sup>-N. While higher NO<sub>3</sub><sup>−</sup>-N concentrations had better NO<sub>3</sub><sup>−</sup>-N supply capacity and poorer slow-release effect. Integrating nutrient supply and slow-release effect, it is recommended to control the application ratio of biochar to NO<sub>3</sub><sup>−</sup>-N at 34–42.75 g·g<sup>−1</sup>. Although the unoptimized biochar application rate cannot be directly applied to the soil as a slow-release fertilizer carrier to meet commercial standards, biochar modification provides new possibilities for this purpose. Moreover, compared with traditional slow-release fertilizer, biochar had good stability and regeneration performance, alleviating the high cost due to the biochar price. In general, biochar still has potential and prospects as a slow-release material. This study provides support for biochar in mitigating environmental problems associated with excess N. |
| first_indexed | 2024-03-10T23:07:45Z |
| format | Article |
| id | doaj.art-a8cc538a7da74814abedcd38fbd30b6a |
| institution | Directory Open Access Journal |
| issn | 2073-4395 |
| language | English |
| last_indexed | 2024-03-10T23:07:45Z |
| publishDate | 2023-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Agronomy |
| spelling | doaj.art-a8cc538a7da74814abedcd38fbd30b6a2023-11-19T09:12:18ZengMDPI AGAgronomy2073-43952023-09-01139244010.3390/agronomy13092440Nitrate Absorption and Desorption by BiocharZijian He0Chao Wang1Hongxia Cao2Jiaping Liang3Shuyao Pei4Zhijun Li5Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling 712100, ChinaKey Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling 712100, ChinaKey Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling 712100, ChinaFaculty of Modern Agricultural Engineering, Kunming University of Science and Technology, Kunming 650500, ChinaKey Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling 712100, ChinaKey Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling 712100, ChinaBiochar is a potential solution for addressing environmental problems related to excessive nitrogen (N). However, there is still some debate about the absorption and desorption of nitrate nitrogen (NO<sub>3</sub><sup>−</sup>-N). Therefore, this study investigated the NO<sub>3</sub><sup>−</sup>-N adsorption and desorption performance onto biochar and biochar-soil mixture to address this gap. The results showed that the biochar produced from apple branches had the ability to absorb NO<sub>3</sub><sup>−</sup>-N with an absorption capacity of 3.51 mg·g<sup>−1</sup>. The absorption data fitted well with the pseudo-second-order kinetic model and Langmuir model. The application of biochar significantly improved soil absorption capacity and slow release of NO<sub>3</sub><sup>−</sup>-N. While higher NO<sub>3</sub><sup>−</sup>-N concentrations had better NO<sub>3</sub><sup>−</sup>-N supply capacity and poorer slow-release effect. Integrating nutrient supply and slow-release effect, it is recommended to control the application ratio of biochar to NO<sub>3</sub><sup>−</sup>-N at 34–42.75 g·g<sup>−1</sup>. Although the unoptimized biochar application rate cannot be directly applied to the soil as a slow-release fertilizer carrier to meet commercial standards, biochar modification provides new possibilities for this purpose. Moreover, compared with traditional slow-release fertilizer, biochar had good stability and regeneration performance, alleviating the high cost due to the biochar price. In general, biochar still has potential and prospects as a slow-release material. This study provides support for biochar in mitigating environmental problems associated with excess N.https://www.mdpi.com/2073-4395/13/9/2440biocharabsorption and desorption performanceoptimum biochar useregenerationslow-release material |
| spellingShingle | Zijian He Chao Wang Hongxia Cao Jiaping Liang Shuyao Pei Zhijun Li Nitrate Absorption and Desorption by Biochar Agronomy biochar absorption and desorption performance optimum biochar use regeneration slow-release material |
| title | Nitrate Absorption and Desorption by Biochar |
| title_full | Nitrate Absorption and Desorption by Biochar |
| title_fullStr | Nitrate Absorption and Desorption by Biochar |
| title_full_unstemmed | Nitrate Absorption and Desorption by Biochar |
| title_short | Nitrate Absorption and Desorption by Biochar |
| title_sort | nitrate absorption and desorption by biochar |
| topic | biochar absorption and desorption performance optimum biochar use regeneration slow-release material |
| url | https://www.mdpi.com/2073-4395/13/9/2440 |
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