6533b834fe1ef96bd129ce6e
RESEARCH PRODUCT
In situ polymerization of soil organic matter by oxidative biomimetic catalysis
Vincenza CozzolinoAlessandro PiccoloAssunta NuzzoRiccardo SpacciniGiancarlo Moschettisubject
CO2 emissions Soil carbon sequestrate Soil organic matter Soil respiration Oxidative biomimetic catalysisSettore AGR/13 - Chimica Agraria010501 environmental sciencesCO2 emissions01 natural sciencesBiochemistrycomplex mixturesSoil respirationlcsh:AgricultureOrganic matter0105 earth and related environmental scienceschemistry.chemical_classificationSoil organic matterSoil organic matterlcsh:SSoil chemistry04 agricultural and veterinary sciencesSoil carbonMineralization (soil science)Soil respirationOxidative biomimetic catalysischemistryPolymerizationEnvironmental chemistrySoil water040103 agronomy & agriculture0401 agriculture forestry and fisheriesSoil carbon sequestrationAgronomy and Crop ScienceFood ScienceBiotechnologySettore AGR/16 - Microbiologia Agrariadescription
Abstract Background Agricultural practices that enhance organic matter content in soil can play a central role in sequestering soil organic carbon (SOC) and reducing greenhouse gases emissions. Methods We used a water-soluble iron-porphyrin to catalyze directly in situ oxidative polymerization of soil organic matter in the presence of H2O2 oxidant, with the aim to enhance OC stabilization, and, consequently, reduce CO2 emissions from soil. The occurred SOC stabilization was assessed by monitoring soil aggregate stability, OC distribution in water-soluble aggregates, soil respiration, and extraction yields of humic and fulvic acids. Results Soil treatment with H2O2 and iron-porphyrin increased the physical stability of water-stable soil aggregates and the total OC content in small aggregates, thereby suggesting that the catalyzed oxidative polymerization increased OC in soil and induced a soil physical improvement. The significant reduction of CO2 respired by the catalyst- and H2O2-treated soil indicated an enhanced resistance of polymerized SOC to microbial mineralization. The catalyzed oxidative polymerization of SOC also significantly decreased the extraction yields of humic and fulvic acids from soil. Conclusions The oxidative catalytic technology described here may become an efficient agricultural practice for OC sequestration in soils and contribute to mitigate global changes. Graphical abstract Catalyzed polymerization of soil organic matter.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-01-01 | Chemical and Biological Technologies in Agriculture |