Affiliation:
1. Agrophysical Research Institute , St. Petersburg , Russia
Abstract
Abstract
Ageing of biochars in soil affects their surface properties and can cause changes in water vapor adsorption-desorption processes. Measurements of hygroscopic water contents and corresponding water potentials of non aged and 3-year aged biochars as well as of sandy soils with medium and high quality were carried out during 5 cycles of water vapor adsorption-desorption processes at a room temperature of 23.5 °C. The results showed a significantly lower content of maximum hygroscopic water in the aged biochars than that in the non aged biochar at the end of water vapor adsorption processes at high air humidity. A significantly higher affinity of the high quality soil to water vapor resulted in insignificant differences in the maximum hygroscopic water content and in significant changes in the corresponding water potentials as compared to the same properties of the soil with medium quality. Minimum content of hygroscopic water was significantly lower in the non aged biochar than in the aged biochars at the end of the water desorption processes at ambient laboratory atmosphere. There were insignificant differences in minimum contents of hygroscopic water and in the corresponding water potentials of the aged biochars from soils with medium and high quality.
Reference10 articles.
1. BOITSOVA, L. – ZINCZUK, E. – NEPRIMEROVA, S. – BALASHOV, E. 2015. Distribution of total and clay-associated organic matter in profiles of arable loamy sand Spodosol. In Folia Oecologica, vol. 42, 2015, no. 1, pp. 1–9. ISSN 1336-5266.
2. BRENNAN, J. K. – BANDOSZ, T. J. – THOMSON, K. T. – GUBBINS, K. E. 2001. Water in porous carbons. In Colloids and Surfaces A: Physicochemical and engineering aspects, vol. 187, 2001, pp. 539–568. ISSN 0927-7757.
3. DO, D. D. – JUNPIROM, S. – DO, H. D. 2009. A new adsorption-desorption model for water adsorption in activated carbon. In Carbon, vol. 47, 2009, no. 6, pp. 1466–1473. ISSN 0016-7061.
4. EL-NAGGAR, A. – LEE, S. S. – RINKLEBE, J. – FAROOQ, M. – SONG, H. – SARMAH, A. K. – ZIMMERMAN, A. R. – AHMAD, M. – SHAHEEN, S.M. – OK, Y. S. 2019. Biochar application to low fertility soils: A review of current status, and future prospects. In Geoderma, vol. 337, 2019, pp. 536–554. ISSN 0016-7061.
5. HORÁK, J. 2015. Testing biochar as a possible way to ameliorate slightly acidic soil at the research field located in the Danubian lowland. In Acta Horticulturae et Regiotecturae, vol. 18, 2015, no. 1, pp. 20–24. ISSN 1338-5259.
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献