Disappearance and alteration process of charcoal fragments in cumulative soils studied using Raman spectroscopy
Disappearance and alteration process of charcoal fragments in cumulative soils studied using Raman spectroscopy
复制标题
DOI：
10.1016/j.geoderma.2016.09.032
复制
发表时间：
2017-01-01
期刊：
影响因子：
6.1
通讯作者：
Inoue, Yohtaro
中科院分区：
文献类型：
--
作者：
Inoue, Jun;Yoshie, Ayaka;Inoue, Yohtaro
获得了日本中部累积土壤中木炭碎片的拉曼光谱，该地区的草原已通过故意燃烧持续了近1000年，并与现代草燃烧后的新鲜木炭碎片进行了比较，以澄清它们的消失和变化过程。在土壤中。虽然每个拉曼光谱参数的值的土壤木炭和新鲜的木炭碎片是部分相似的，某些差异表明它们的变化或消失观察。土壤中石墨化程度较低的木炭碎片在十年至世纪尺度上随着年龄的变化而发生化学变化，这是由其化学结构的缺陷之间的距离或缺陷类型的变化引起的。在新鲜的木炭样品中发现了具有较高石墨化度的木炭碎片，而在年轻和古老的土壤中发现了很少的木炭碎片，这表明这些木炭碎片在形成后立即消失。这一事实意味着，具有较高石墨化的木炭碎片往往不会留在土壤中，可能是由于其物理性质，如脆性，密度和流体动力学行为。我们的研究结果表明，木炭的物理性质对土壤中的木炭残留物有重要影响，木炭的化学性质也是如此。(C)2016作者由爱思唯尔公司出版
Raman spectra of charcoal fragments in cumulative soils in central Japan, where grasslands have been sustained using intentional burning for similar to 1000 years, were obtained and compared to those of fresh charcoal fragments after modern grass burning to clarify their disappearance and alteration process in the soils. Although the values of each Raman-spectrum parameter of the soil charcoal and fresh charcoal fragments are partially similar, certain differences indicating their alteration or disappearance were observed. Charcoal fragments with lower graphitization in soils altered chemically with age at decadal to century scale, suggested by changes in distance between defects or defect type of their chemical structures. Charcoal fragments with higher graphitization were found in fresh charcoal samples, whereas very few charcoal fragments were found in both young and old soils, indicating that these charcoal fragments disappeared instantly after they were formed. This fact implies that charcoal fragments with higher graphitization tend to not remain in soils, possibly owing to their physical properties such as fragility, density, and hydrodynamic behavior. Our findings suggest that charcoal's physical properties have a vital influence on charcoal residues in soils, as do charcoal's chemical properties. (C) 2016 The Authors. Published by Elsevier B.V.