Issue 9, 2024

Molecular characteristics of organic matter derived from sulfonated biochar

Abstract

Sulfonated biochar (SBC), as a functional carbon-based material, has attracted widespread attention due to its excellent adsorption properties. The composition of biochar-derived organic matter (B-DOM) is a key factor influencing the migration and transformation of soil elements and pollutants. However, molecular characteristics of sulfonated biochar-derived organic matter (SBC-DOM) are still unclear. In this study, the molecular composition of derived organic matter (DOM) from SBC prepared via one-step carbonization-sulfonation techniques was investigated by Fourier-transform ion cyclotron resonance mass spectrometry (FT-ICR-MS) and then compared with those of DOMs from rice husk (RH), pyrochar (PYC), and hydrochar (HYC). The results show that the CHOS- and CHONS-containing formulae are predominant in SBC-DOM, accounting for 85% of the total molecular formula number, while DOMs from RH, PYC, and HYC are dominated by CHO-containing formulae. Compared to PYC-DOM and HYC-DOM, SBC-DOM has more unsaturated aliphatic compounds, which make it more labile and easily biodegraded. Additionally, SBC-DOM has higher O/C, (N + O)/C ratios and sulfur-containing compounds. These findings provide a theoretical basis for further research on the application of sulfonated biochar in soil improvement and remediation.

Graphical abstract: Molecular characteristics of organic matter derived from sulfonated biochar

Supplementary files

Article information

Article type
Paper
Submitted
25 Apr 2024
Accepted
28 Jul 2024
First published
30 Jul 2024

Environ. Sci.: Processes Impacts, 2024,26, 1641-1650

Molecular characteristics of organic matter derived from sulfonated biochar

Z. Jiang, C. He, F. Gao, Q. Shi, Y. Chen, H. Yu, Z. Zhou and R. Wang, Environ. Sci.: Processes Impacts, 2024, 26, 1641 DOI: 10.1039/D4EM00233D

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