Показать сокращенную информацию
dc.contributor.author | Huang X. | |
dc.contributor.author | Li Y. | |
dc.contributor.author | Guggenberger G. | |
dc.contributor.author | Kuzyakov Y. | |
dc.contributor.author | Liu B.F. | |
dc.contributor.author | Wu J. | |
dc.date.accessioned | 2021-02-25T20:59:26Z | |
dc.date.available | 2021-02-25T20:59:26Z | |
dc.date.issued | 2020 | |
dc.identifier.issn | 2051-8153 | |
dc.identifier.uri | https://dspace.kpfu.ru/xmlui/handle/net/162836 | |
dc.description.abstract | © The Royal Society of Chemistry 2020. The emerging consensus on organic matter (OM) cycling in soil and sediment proposes that a continuum of biological and geochemical processes in the micro-environment controls the fate of OM. However, spatio-temporal observation of the biogeochemical nature and behaviour of OM at the soil-water interfaces (SWIs) is impeded by the heterogonous and opaque nature of their microenvironment. Herein, we used a novel SoilChip method (soil microarrays incubated with a predefined solution) to continuously mimic and trace the OM biogeochemistry at SWIs for 21 days. Combining X-ray photoelectron spectroscopy and ion sputtering on SoilChips, we provided the first direct evidence that a nanoscale organic film with a distinct composition and thickness gradually formed at the SWI within 21 days of cultivation. Although the OM coating on the SWI quickly reached equilibrium within 4 days, the formation of thicker mineral-organic association (MOA, 20-130 nm) and microbial biomass (>130 nm) continued, partially at the cost of the thin MOA (<20 nm). Consistent with the thickening SWI, the bioavailability of nutrients (dissolved organic C and ammonium) decreased gradually over 21 days, which restrained the microbial activities. Collectively, thickening SWIs act as a biogeochemical gate to regulate the bioavailability of specific organic compounds and determine their preservation or microbial mineralization. Further, thickening SWIs in thez-axis direction provide direct structural insight to increase carbon sequestration in soil and sediment. | |
dc.relation.ispartofseries | Environmental Science: Nano | |
dc.title | Direct evidence for thickening nanoscale organic films at soil biogeochemical interfaces and its relevance to organic matter preservation | |
dc.type | Article | |
dc.relation.ispartofseries-issue | 9 | |
dc.relation.ispartofseries-volume | 7 | |
dc.collection | Публикации сотрудников КФУ | |
dc.relation.startpage | 2747 | |
dc.source.id | SCOPUS20518153-2020-7-9-SID85091867626 |