中文摘要：

通过对有机碳损失率及其半衰期的考察,探讨了植物及沉积物两类生物炭在4种不同的氧化剂NaClO、H2O2、Fenton试剂和KMnO4氧化时的稳定性.结果表明,木质素的含量是影响植物及其生物炭抗氧化性的主要因素；而对于沉积物及其生物炭,无机矿物对有机碳的保护作用是其稳定的主要机理.与原生物质相比,所有生物炭均表现出较高的稳定性,可以更加稳定地固定碳.

英文摘要：

In this study,the oxidation resistance of two biochars was assessed based on the loss rate and half-life period of organic carbon. Four oxidants were used for the oxidation experiment of biochars,including NaClO,H2O2,Fenton and KMnO4. The content of lignin in plants and plantderived biochars was the major factor for oxidation resistance. For sediments and sediment-derived biochars,the oxidation resistance mechanism was the protection of inorganic mineral for organic carbon. Compared with the orginal biomass,all of biochars showed higher oxidation resistance,implying that biochar could sequestrate carbon more stably and effectively.