| DOI: | 10.1007/s10533-017-0374-1
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| Scopus记录号: | 2-s2.0-85029009710
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| 论文题名: | Dissolved organic matter retention in volcanic soils with contrasting mineralogy: a column sorption experiment |
| 作者: | Sanderman J.; Kramer M.G.
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| 刊名: | Biogeochemistry
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| ISSN: | 0168-2563
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| EISSN: | 1573-515X
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| 出版年: | 2017
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| 卷: | 135, 期:3 | | 起始页码: | 293
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| 结束页码: | 306
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| 语种: | 英语
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| 英文关键词: | Hawai’i
; Organic acids
; Organo-mineral association
; Short range ordered minerals
; Soil carbon
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| Scopus关键词: | chronosequence
; dissolved organic carbon
; dissolved organic matter
; experimental study
; mineralogy
; organic acid
; precipitation (chemistry)
; soil carbon
; soil chemistry
; soil degradation
; soil horizon
; soil organic matter
; sorption
; Hawaii [United States]
; United States
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| 英文摘要: | There is an increasing recognition that sorption and precipitation reactions between the dissolved phase of organic matter and reactive minerals and metals found in soils are an important carbon stabilization mechanism. We explored the relative importance of this sorption mechanism with pedological shifts in soil properties by conducting a dissolved organic matter leaching/sorption experiment using intact soil cores from a substrate/age gradient in Hawai’i. In the subsurface horizons, sorption of dissolved organic carbon was often positively correlated short-range ordered (SRO) mineral content, with sorption rates approaching 100% when SRO minerals dominated. Dissolved organic matter sorption in the presence of SRO minerals was highly selective towards aromatic compounds, consistent with prior nuclear magnetic resonance spectroscopy conducted on carbon found in SRO rich mineral soil. In subsurface horizons where SRO content was low (youngest and oldest sites in the chronosequence), sorption was also found to be high but much less selective, more reversible and more degradable indicating that different stabilization mechanisms are operative. These experimental results provide further evidence for a direct mechanism by which volcanic soils are able to store disproportionately high amount of soil organic matter via retention of aromatic acids. © 2017, Springer International Publishing AG. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/83235
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| Appears in Collections: | 气候减缓与适应
气候变化事实与影响
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作者单位: | Woods Hole Research Center, 149 Woods Hole Road, Falmouth, MA, United States; Washington State University, Vancouver, WA, United States
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| Recommended Citation: | |
Sanderman J.,Kramer M.G.. Dissolved organic matter retention in volcanic soils with contrasting mineralogy: a column sorption experiment[J]. Biogeochemistry,2017-01-01,135(3)
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