0000000000343907

AUTHOR

Nikolas Hagemann

showing 3 related works from this author

Organic coating on biochar explains its nutrient retention and stimulation of soil fertility

2017

Amending soil with biochar (pyrolized biomass) is suggested as a globally applicable approach to address climate change and soil degradation by carbon sequestration, reducing soil-borne greenhouse-gas emissions and increasing soil nutrient retention. Biochar was shown to promote plant growth, especially when combined with nutrient-rich organic matter, e.g., co-composted biochar. Plant growth promotion was explained by slow release of nutrients, although a mechanistic understanding of nutrient storage in biochar is missing. Here we identify a complex, nutrient-rich organic coating on co-composted biochar that covers the outer and inner (pore) surfaces of biochar particles using high-resoluti…

ScienceSettore AGR/13 - Chimica AgrariaGeneral Physics and AstronomyBiomass010501 environmental sciencesCarbon sequestrationengineering.materialcomplex mixtures01 natural sciencesArticleGeneral Biochemistry Genetics and Molecular BiologyPhysics and Astronomy (all)NutrientCoatingSoil retrogression and degradationBiocharOrganic matterlcsh:Science0105 earth and related environmental sciences2. Zero hungerchemistry.chemical_classificationBiochemistry Genetics and Molecular Biology (all)MultidisciplinaryQChemistry (all)fungi04 agricultural and veterinary sciencesGeneral Chemistry15. Life on landchemistryAgronomy13. Climate actionEnvironmental chemistry040103 agronomy & agricultureengineering0401 agriculture forestry and fisherieslcsh:QChemistry (all); Biochemistry Genetics and Molecular Biology (all); Physics and Astronomy (all)Soil fertilityNature Communications
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Microstructural and associated chemical changes during the composting of a high temperature biochar: Mechanisms for nitrate, phosphate and other nutr…

2018

Recent studies have demonstrated the importance of the nutrient status of biochar and soils prior to its inclusion in particular agricultural systems. Pre-treatment of nutrient-reactive biochar, where nutrients are loaded into pores and onto surfaces, gives improved yield outcomes compared to untreated biochar. In this study we have used a wide selection of spectroscopic and microscopic techniques to investigate the mechanisms of nutrient retention in a high temperature wood biochar, which had negative effects on Chenopodium quinoa above ground biomass yield when applied to the system without prior nutrient loading, but positive effects when applied after composting. We have compared non-co…

Environmental EngineeringSettore AGR/13 - Chimica AgrariaBiochar nutrient interactions; Composted biochar; Phosphorus and nitrogen capture; Soil amendmentsBiomasschemistry.chemical_element010501 environmental sciencesPhosphorus and nitrogen capturecomplex mixtures01 natural scienceschemistry.chemical_compoundNutrientNitrateBiocharEnvironmental ChemistryCharcoalWaste Management and Disposal0105 earth and related environmental sciences2. Zero hungerChemistryPhosphorusBiochar nutrient interaction04 agricultural and veterinary sciences15. Life on landSoil amendmentsPollutionSoil conditionerAgronomyEnvironmental chemistryvisual_artSoil water040103 agronomy & agriculturevisual_art.visual_art_medium0401 agriculture forestry and fisheriesComposted biocharScience of The Total Environment
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Designing biochar properties through the blending of biomass feedstock with metals: Impact on oxyanions adsorption behavior

2018

Metal-blending of biomass prior to pyrolysis is investigated in this work as a tool to modify biochar physico-chemical properties and its behavior as adsorbent. Six different compounds were used for metal-blending: AlCl3, Cu(OH)2, FeSO4, KCl, MgCl2 and Mg(OH)2. Pyrolysis experiments were performed at 400 and 700 °C and the characterization of biochar properties included: elemental composition, thermal stability, surface area and pore size distribution, Zeta potential, redox potential, chemical structure (with nuclear magnetic resonance) and adsorption behavior of arsenate, phosphate and nitrate. Metalblending strongly affected biochars' surface charge and redox potential. Moreover, it incre…

LangmuirEnvironmental EngineeringP06 - Sources d'énergie renouvelableHealth Toxicology and Mutagenesishttp://aims.fao.org/aos/agrovoc/c_290360208 environmental biotechnology02 engineering and technology010501 environmental sciences01 natural sciencesRedoxchemistry.chemical_compoundAdsorptionBiocharPhysico-chemicalBiomasseZeta potentialEnvironmental ChemistrySurface chargeBiomassOxydation0105 earth and related environmental scienceshttp://aims.fao.org/aos/agrovoc/c_26874Designer biocharMetalPublic Health Environmental and Occupational HealthArsenateGeneral MedicineGeneral ChemistryOxyanionPore size distributionMétalPollutionMetal-blendingU50 - Sciences physiques et chimie020801 environmental engineeringhttp://aims.fao.org/aos/agrovoc/c_926chemistryChemical engineeringMetalsCharcoalCharbonPyrolyseAdsorptionhttp://aims.fao.org/aos/agrovoc/c_5472Pyrolysishttp://aims.fao.org/aos/agrovoc/c_1693
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