农业环境科学学报2026，Vol.45Issue(5)：1168-1178,11.DOI:10.11654/jaes.2025-0564
物理老化对不同秸秆生物炭理化性质和热稳定性的影响
Effects of physical aging on the physicochemical properties and thermal stability of different straw biochars
摘要
Abstract
To investigate the effect of physical aging on the physicochemical properties and thermal stability of straw biochars,two artificial accelerated aging methods,including wet-dry cycling and freeze-thaw cycling,were applied to wheat straw biochar(WBC300,WBC400,WBC500)and maize straw biochar(MBC300,MBC400,MBC500)produced under different pyrolysis temperatures(300,400 ℃,and 500 ℃).The physicochemical properties and thermal decomposition characteristics of fresh and aged biochars were compared,and the recalcitrance index(R50)was used to assess their carbon sequestration potential.The results showed that under the same pyrolysis temperature,WBC exhibited higher aromaticity,while MBC demonstrated greater stability due to its higher ash content.Increasing pyrolysis temperature enhanced both the aromaticity and R50 of biochar via promoting the carbonization reactions.Wet-dry and freeze-thaw cycling reduced the pH while increasing the hydrophilicity and polarity of biochar via inducing oxidation on its surface.Both aging treatments increased the mesopore quantity in WBC500 and MBC500,thus increasing their specific surface areas.The periodic evaporation of wet-dry cycling had a more pronounced effect on the modification of pore structure,which is particularly evident in MBC500.Both aging treatments obviously increased the thermal stability of WBC500 but reduced that of MBC300 and MBC400,which is mainly attributed to the differences in feedstock composition and oxidation degree.The two aging treatments significantly increased the R50 of WBC samples produced under different pyrolysis temperatures by 2.18％-5.80％,while only wet-dry cycling significantly increased the R50 of MBC500 by 2.31％.This study demonstrates that aged high-temperature straw biochars possess superior pore structure and carbon sequestration potential,which is significantly influenced by feedstock characteristics.关键词
老化/生物炭/理化性质/结构特征/热稳定性/稳定性系数Key words
aging/biochar/physicochemical properties/structural characteristics/thermal stability/recalcitrance index分类
化学化工引用本文复制引用
范润川,郝才伟,李文博,朱英,郑蕾,程红光,杨凯..物理老化对不同秸秆生物炭理化性质和热稳定性的影响[J].农业环境科学学报,2026,45(5):1168-1178,11.基金项目
国家自然科学基金项目(41907095) （41907095）
山东省自然科学基金项目(ZR2021ME214) （ZR2021ME214）
西藏玉曲河扎拉水电站施工扰动区生态修复规划及生态技术研究(CDT-YQH-ZL-X-[2023]-005)National Natural Science Foundation of China(41907095) （CDT-YQH-ZL-X-[2023]-005）
Natural Science Foundation of Shandong Province(ZR2021ME214) （ZR2021ME214）
Study on the Ecological Restoration Planning and Ecological Technologies in the Construction Disturbed Areas of the Zala Hydropower Station on the Yuqu River in Xizang(CDT-YQH-ZL-X-[2023]-005) （CDT-YQH-ZL-X-[2023]-005）
