Pore size and organic carbon of biochar limit the carbon sequestration potential of Bacillus cereus SR.

Autor: Li, Jie1 (AUTHOR), Xie, Ningyi1 (AUTHOR), Feng, Changchun2 (AUTHOR), Wang, Changquan1 (AUTHOR) w.changquan@163.com, Huang, Rong1 (AUTHOR), Tao, Qi1 (AUTHOR), Tang, Xiaoyan1 (AUTHOR), Wu, Yingjie1 (AUTHOR), Luo, Youlin1 (AUTHOR), Li, Qiquan1 (AUTHOR), Li, Bing1 (AUTHOR) benglee@163.com
Předmět:
Zdroj: Ecotoxicology & Environmental Safety. Apr2024, Vol. 274, pN.PAG-N.PAG. 1p.
Abstrakt: Carbon-fixing functional strain-loaded biochar may have significant potential in carbon sequestration given the global warming situation. The carbon-fixing functional strain Bacillus cereus SR was loaded onto rice straw biochar pyrolyzed at different temperatures with the anticipation of clarifying the carbon sequestration performance of this strain on biochar and the interaction effects with biochar. During the culture period, the content of dissolved organic carbon (DOC), easily oxidizable organic carbon, and microbial biomass carbon in biochar changed. This finding indicated that B. cereus SR utilized organic carbon for survival and enhanced carbon sequestration on biochar to increase organic carbon, manifested by changes in CO 2 emissions and ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) enzyme activity. Linear regression analysis showed that the strain was likely to consume DOC on 300 °C biochar, although the Rubisco enzyme activity was higher. In contrast, the strain had a higher carbon sequestration potential on 500 °C biochar. Correlation analysis showed that Rubisco enzyme activity was controlled by the physical structure of the biochar. Our results highlight the differences in the survival mode and carbon sequestration potential of B. cereus SR on biochar pyrolyzed at different temperatures. • Carbon-fixing strain Bacillus cereus SR survived on biochar by using organic carbon compositions of biochar. • Increase in organic carbon fractions of biochar by RubisCO enzyme of strain. • The strains changed the pore size structure of biochar. • Physical properties of biochar limited the function of carbon-fixing strain. [ABSTRACT FROM AUTHOR]
Databáze: GreenFILE