利用扫描电镜—能谱仪分析不同温度产生的生物质炭的化学与结构特性。 结果表明: 随温度升高, 芒草碳的平均碳含量和最大碳含量均呈现增加趋势, 平均碳含量和最大碳含量与最高处理温度之间为显著正相关关系(r值为0.76和0.86)。 平均碳含量和最大碳含量与高温灼烧法测定的碳含量之间为显著正相关关系(r值为0.83和0.91), 最大碳含量的相关性好于平均碳含量。 因此, 应用该方法获得芒草炭的碳含量与温度相关性好, 最大碳含量可以用于生物炭组分分析; 电镜扫描结果可以有效分析芒草炭的结构特性。 基于该方法快速、 简便、 稳定以及可对生物质炭的结构和组分同时分析的优点, 它是一种极具发展前途的分析方法, 有助于生物质炭等其他材料的结构特性与组分研究。

Scanning Electron Microscope-Energy Dispersive X-ray spectroscopy (SEM-EDX) was applied to analyze the chemical and structural properties of biochars produced under different temperatures. Results showed that average carbon content (SEM C aver.) and maximum carbon content (SEM C max.) of miscanthus (MS) biochar increased as temperature increasing. There were significant and positive relationships between SEM C max., SEM C aver. and highest treatment temperature (HTT) (r were 0.76 and 0.86). SEM C max., SEM C aver. and dry combustion total carbon content had significant and positive relationships (r were 0.83 and 0.91), SEM C max. which was better than SEM C aver. So the carbon content of MS biochar which had good correlationship with temperature analyzed by SEM-EDX, SEM C max. could be used for composition analysis of biochar, scanning results could analyze structural properties of biochar effectively. This method is rapid, simple and stable. It also could analyze structure and composition of biochar simultaneously. It is a promising method that would be useful to study the structure and composition of biochar and other materials.