期刊
FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING
卷 16, 期 11, 页码 -出版社
HIGHER EDUCATION PRESS
DOI: 10.1007/s11783-022-1579-7
关键词
Environmental deoxyribonucleic acid; Antibiotic resistance genes; Biochar; Adsorption thermodynamics
资金
- National Natural Science Foundation of China [42167030]
- Yunnan Young and Middle-aged Academic and Technical Leaders Reserve Talents [2018HB008]
- Yunnan Ten Thousand Talents Plan Young and Elite Talents Project [YNWR-QNBJ-2018-336]
- Yunnan Provincial Scientific Innovation Team of Soil Environment and Ecological Safety [2019HC008]
This study investigates the adsorption of herring sperm DNA (hsDNA) on pine sawdust biochar and finds that biochar prepared at high pyrolysis temperatures, with higher surface area and stronger pi-pi interaction, facilitates the adsorption of DNA.
Environmental deoxyribonucleic acid (eDNA), which includes antibiotic resistance genes, is ubiquitous in the environment. The interactions between eDNA and biochar, a promising material widely used in soil amendment and water treatment, greatly affect the environmental behavior of eDNA. Hitherto few experimental evidences are available yet, especially on the information of thermodynamics and energy distribution to explains the interactions between biochar and eDNA. This study investigated the adsorption of herring sperm DNA (hsDNA) on pine sawdust biochar, with a specific emphasis on the adsorption thermodynamics and site energy distribution. The adsorption of hsDNA on biochar was enhanced by an increase in the pyrolysis and adsorption temperatures. The higher surface area, stronger pi-pi interaction, and weaker electrostatic repulsion between hsDNA and biochars prepared at high pyrolysis temperatures facilitated the adsorption of hsDNA. The thermodynamics indicated that the adsorption of hsDNA on biochar was spontaneous and endothermic. Therefore, higher temperature was beneficial for the adsorption of hsDNA on biochar; this was well explained by the increase in E* and F(E*) with the adsorption temperature. These results are useful for evaluating the migration and transformation of eDNA in the presence of biochar. (C) Higher Education Press 2022
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