降雨产生的土壤源生物炭气溶胶
Journal: Ecological Environment and Protection DOI: 10.12238/eep.v8i1.2466
Abstract
生物炭由于其对土壤起到修复、改良的作用,在农业领域广泛应用,导致土壤中的生物炭逐渐积累。本研究为探究土壤中的生物炭颗粒是否能通过降雨撞击进入大气,准备了生物炭改良场地和对照场地,在其上方进行取样。利用扫描电子显微镜(SEM),在生物炭改良场地上方降雨时收集的大气总悬浮颗粒物(TSP)样品中观察到了生物炭颗粒,其来源是降雨撞击进入大气的土壤生物炭。然后,通过热光碳分析(TOT)和金属元素分析发现降雨产生的土壤源生物炭气溶胶增加了有机碳(OC)、无机碳(EC)和部分金属元素(包括Na、Mg、Al、K)在大气中的占比,分别为25.15±2.21%、8.25±1.33%、2.23±0.43%、1.43±0.20%、3.85±0.27%、3.68±0.67%。
Keywords
土壤；生物炭；降雨；土壤源气溶胶；大气
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