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Chen Y, Tan Y, Su L, Zou W, Wu B, Gao W, Hu Z, Li A, Zhou Z, Zhou N. Oxygen-limited pyrolysis and incineration impact on biochar transport. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:105247-105258. [PMID: 37710062 DOI: 10.1007/s11356-023-29813-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Accepted: 09/06/2023] [Indexed: 09/16/2023]
Abstract
At present, studies on biochar transport have focused on biochar obtained by oxygen-limited pyrolysis, which may differ from conventional biochar produced by incineration in nature. This work investigated the transport and retention mechanisms of three types of oxygen-limited pyrolytic biochar and three types of traditional biochar in saturated porous media. The results showed that the specific surface area of the three oxygen-limited pyrolysis biochar (180-200 m2·g-1) was higher than that of the traditional biochar (50-60 m2·g-1). Therefore, the retention capacity of pyrolytic biochar is strong and the permeability is less than 0.1. The absolute value of the zeta potential of traditional biochar is greater than 30 mV, and the electrostatic repulsion generated is stronger, with a peak penetration rate of 0.16. Moreover, the zeta potential of biochar and traditional biochar is regulated by pH value and ionic strength. In acidic conditions or solutions with high ionic strength, the zeta potentials of the six types of biochar changed to about - 15 mV, and the second minimum value was less than 0, indicating that there was a tendency for sedimentation. This study provides a new perspective for assessing the transport and environmental risks of biochar in the environment.
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Affiliation(s)
- Yuzhen Chen
- Hunan Engineering Research Center for Biochar, Hunan Agricultural University, Changsha, 410128, China
- College of Chemistry and Materials Science, College of Agronomy, Hunan Agricultural University, Changsha, 410128, China
| | - Yan Tan
- Hunan Engineering Research Center for Biochar, Hunan Agricultural University, Changsha, 410128, China
- College of Chemistry and Materials Science, College of Agronomy, Hunan Agricultural University, Changsha, 410128, China
| | - Lezhu Su
- Hunan Engineering Research Center for Biochar, Hunan Agricultural University, Changsha, 410128, China
- College of Chemistry and Materials Science, College of Agronomy, Hunan Agricultural University, Changsha, 410128, China
| | - Wangqi Zou
- Hunan Engineering Research Center for Biochar, Hunan Agricultural University, Changsha, 410128, China
- College of Chemistry and Materials Science, College of Agronomy, Hunan Agricultural University, Changsha, 410128, China
| | - Binhai Wu
- Hunan Engineering Research Center for Biochar, Hunan Agricultural University, Changsha, 410128, China
- College of Chemistry and Materials Science, College of Agronomy, Hunan Agricultural University, Changsha, 410128, China
| | - Wenbin Gao
- Hunan Engineering Research Center for Biochar, Hunan Agricultural University, Changsha, 410128, China
- College of Chemistry and Materials Science, College of Agronomy, Hunan Agricultural University, Changsha, 410128, China
| | - Zhan Hu
- Hunan Engineering Research Center for Biochar, Hunan Agricultural University, Changsha, 410128, China
- College of Chemistry and Materials Science, College of Agronomy, Hunan Agricultural University, Changsha, 410128, China
| | - Aoxuan Li
- Hunan Engineering Research Center for Biochar, Hunan Agricultural University, Changsha, 410128, China
- College of Chemistry and Materials Science, College of Agronomy, Hunan Agricultural University, Changsha, 410128, China
| | - Zhi Zhou
- Hunan Engineering Research Center for Biochar, Hunan Agricultural University, Changsha, 410128, China
- College of Chemistry and Materials Science, College of Agronomy, Hunan Agricultural University, Changsha, 410128, China
| | - Nan Zhou
- Hunan Engineering Research Center for Biochar, Hunan Agricultural University, Changsha, 410128, China.
- College of Chemistry and Materials Science, College of Agronomy, Hunan Agricultural University, Changsha, 410128, China.
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