数字农科院2.0

Long-term aging of oxychar and biochar: structural, adsorptive, and microbial transformations

文献类型： 外文期刊

作者： Cheng Ji;Shutao Wang;Man Zhang;Hang Sun;Qinggang Meng;Kexin Zhao;Yifan Li;Shiming Su;Bing Han;Wei Liu

作者机构：

关键词： Biochar aging;Heavy metal adsorption;Microbial succession;Oxychar;Soil organic matter

期刊名称： Fuel

ISSN： 0016-2361

年卷期： 2026 年 415 卷

页码：

收录情况： SCIE（2025版） ; ; EI（2025版）

摘要： This study investigated the effects of long-term aging on the physicochemical properties and microbial communities of oxychar (OC) and traditional biochar (BC) using the net bag method during a 682-day field experiment. The results showed that surface roughening and mineral adhesion developed in both OC and BC with time. In parallel, oxygen-containing functional groups (OFCGs) increased, whereas carboxyl groups. After aging, the cadmium (Cd) increased adsorption capacities of both materials increased. BC consistently exhibited a higher adsorption capacity than OC, and this difference correlated with the OFCGs levels. In addition, soil organic matter content increased across all treatments. Compared with OC, BC showed a significantly greater increase relative to the control. Microbial analyses revealed an initial increase in the diversity and abundance of surface-associated microbial communities, followed by distinct succession patterns. OC preferentially enriched bacteria associated with organic carbon decomposition. In contrast, microbial communities on BC shifted toward taxa involved in nutrient cycling, which was linked to a reduction in organic carbon availability. These results improve our understanding of biochar aging processes and indicate the potential of OC as an alternative to BC for enhancing soil quality and immobilizing contaminants.

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