Improving the phosphorus budget of European agricultural soils

Panagos, Panos; Köningner, Julia; Ballabio, Cristiano; Liakos, Leonidas; Muntwyler, Anna; Borrelli, Pasquale; Lugato, Emanuele

doi:10.1016/j.scitotenv.2022.158706

Cited by 56 publications

(35 citation statements)

References 82 publications

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“…Widely used as an agricultural fertilizer, phosphorus is a non-renewable resource obtained from phosphate rock mines. Multiple authors and agencies confirm its depletion in the short-medium term (30-200 years) [12][13][14]. Furthermore, the high Disclaimer/Publisher's Note: The statements, opinions, and data contained in all publications are solely those of the individual author(s) and contributor(s) and not of MDPI and/or the editor(s).…”

Section: Introductionmentioning

confidence: 94%

Circular Economy Model Through Phosphorus Recovery to Obtain Struvite from Sewage Sludge

Cañas¹,

Hermana²,

Garcı́a³

2023

Preprint

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Environmental legislation on waste management coupled with the potential for nutrients recovery are key factors encouraging the use of advanced treatment technologies to manage biosolids waste. In this context, phosphorus recovery from a sewage sludge treated by a wet oxidation process was carried out. High organic matter (up to 85% in COD) and Total Solids content (up to 75%) removal values were achieved at elevated temperature (up to 300 ºC) and pressure (up to 200 bar) conditions. The liquid and solid fractions found in oxidation process effluent contain amounts of phosphorus that can be recovered. This research aims to maximize its valorization in both liquid and solid fractions. In the liquid effluent, phosphorus was recovered (up to 90 mg P L-1) by chemical precipitation as struvite (MgNH4PO4∙6 H2O), a slow-release fertilizer. In this case, P recoveries greater than 95% were achieved. Also, the solid fraction, analyzed after filtration and drying (68 mg P gsolid-1), was treated by acid leaching, to achieve up to 60% phosphorus recovery. All phosphorus extracted was in orthophosphate form.

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Section: Introductionmentioning

confidence: 94%

Circular Economy Model Through Phosphorus Recovery to Obtain Struvite from Sewage Sludge

Cañas¹,

Hermana²,

Garcı́a³

2023

Preprint

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“…The use of mineral P has decreased, but the accumulated P stock still cycles in the agricultural system: half of the P input in 2019 was from manure (Panagos et al, 2022). The annual average loss to waterbodies is only 0.35 kg P/ha/year (Panagos et al, 2022), indicating that the soils have retained much of the excess P balance. The cumulative sum of the P F I G U R E 1 Soil C and P balances can be controlled by soil management that targets vegetative cover and soil structure through cover crops and subsoiling.…”

Section: Loss Of C In Increasingly Compacted European Farmland Soilsmentioning

confidence: 99%

“…The use of mineral P has decreased, but the accumulated P stock still cycles in the agricultural system: half of the P input in 2019 was from manure (Panagos et al., 2022). The annual average loss to waterbodies is only 0.35 kg P/ha/year (Panagos et al., 2022), indicating that the soils have retained much of the excess P balance. The cumulative sum of the P balance has accumulated 400–1500 kg/ha of P (Figure 2a), which can be both a resource for food production (Noë et al., 2020) and a long‐term threat for waterbodies (Schulte et al., 2010).…”

Section: Accumulation Of P and Loss Of C In Increasingly Compacted Eu...mentioning

confidence: 99%

Cover crops and soil loosening are key components for managing P and C stocks in agricultural soils

Mattila

2023

Soil Use and Management

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Agricultural soils have accumulated phosphorus (P) and lost carbon (C) in the recent decades. Simultaneously, soil structure has been degraded by the large increase in machinery weight. High wheel loads compact the subsoil, resulting in reduced root growth, decreased yields, and hence decreased C inputs and P removals. To reduce the accumulated excess P stock, the P balance should be kept strongly negative for decades, which requires high biomass production. P accumulation in poorly yielding field parts has created local hotspots, often characterized by soil compaction and poor drainage. They may be only 1%–6% of the agricultural landscape area but present a high risk for waterbodies. Identifying and targeting these hotspots for P removal can be a key strategy for mitigating P emissions. Achieving the P removal is most likely to require soil loosening to repair the damage caused by compaction and use of cover crops to mine out the accumulated P. This soil improvement strategy can also be beneficial for C sequestration and crop productivity. This commentary highlights the current status and recent developments in the interactions between compaction, cover crops and P loss to provide a research basis for developing landscape‐level strategies.

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“…YSRs can explore the integration of various disciplines and seek new synergies while always being aware of policy requirements. For instance, investigating the linkages between soil modelling and economic assessments (Sartori et al, 2019) or looking for better ways of coupling soil erosion with nutrient losses (Panagos, Köningner, et al, 2022) are research areas that may have policy impacts. In this context, looking at the numerous funding opportunities offered by the EU Mission ‘A Soil Deal for Europe in 2021–2027' (Maréchal et al, 2023), YSRs may have all the tools needed to have their ideas realised and, thus, their voices better heard.…”

Section: Young Soil Researchers and Future Research Prioritiesmentioning

confidence: 99%

Let's give a voice to young soil researchers

Panagos,

Orgiazzi

2023

European J Soil Science

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Young soil researchers represent a generation that will respond to future soil challenges and implement connected policy developments. They will deal with emerging challenges and opportunities for soil protection, such as climate change, land use change, scenario analysis, big data, modelling integration, one health aspects, and soil living laboratories. In this context, the EU Soil Observatory (EUSO) provides an inclusive forum for participatory research in the EU and beyond. In 2021, at the first gathering of the EUSO Stakeholders Forum, young researchers were actively engaged through the establishment of the EU Young Soil Researchers Forum. This resulted in interesting presentations, discussions, and research outputs, which have been brought together in this virtual thematicissue. Similar support for young soil researchers is expected at the 2024 EUSO Stakeholders Forum.

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Improving the phosphorus budget of European agricultural soils

Cited by 56 publications

References 82 publications

Circular Economy Model Through Phosphorus Recovery to Obtain Struvite from Sewage Sludge

Circular Economy Model Through Phosphorus Recovery to Obtain Struvite from Sewage Sludge

Cover crops and soil loosening are key components for managing P and C stocks in agricultural soils

Let's give a voice to young soil researchers

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