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Phosphorus - OSTI GOV

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Last Updated: 15 August 2022

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Transformation Kinetics of Phosphorus and Nitrogen in Iron-Rich Sewage Sludges during Hydrothermal Treatment and Recovery of Nutrients from Process Water

Hydrothermal treatment is an emerging method for effective sewage sludge disposal and resource recovery. Many sludges are rich in iron due to the common use of Fe salts in water resource recovery plants. This report presented a systematic review of phosphorus and nitrogen dynamics in HT of Fe-rich sewage sludge and provided recommendations for nutrient restoration. This research was systematically reviewed to determine the effect of HT temperature, treatment time, and sludge source on dynamic speciation evolution during HT of Fe-rich sewage sludge. P speciation of the sludge mixture did not change dramatically within 4. 5 hours at 125 °C HT, but insoluble and labile P became insoluble P insoluble P over time at 175 and 225 pp. This research provides new insight into P and N transformation during HT of Fe-rich sludges, as well as a modular system for maximum P and N recovery from the treatment products.

Source link: https://www.osti.gov/biblio/1813052


Zero-Valent Palladium Single-Atoms Catalysts Confined in Black Phosphorus for Efficient Semi-Hydrogenation

It is found that 2D black phosphorus acts as a giant phosphorus ligand to reduce a high density of single atoms by atomic layer deposition in this research. Metallic Pd 1 / BP SAC shows a highly selective semi-hydrogenation of phenylacetylene toward styrene, distinguishing from metallic Pd nanoparticles that enable the production of fully hydrogenated products. Pd atom formations correlate with adjacent P atoms, wherein H atoms tend to adsorb, facilitating H 2 dissociative adsorption.

Source link: https://www.osti.gov/biblio/1813966


Nitrogen and phosphorus cycling in an ombrotrophic peatland: a benchmark for assessing change

Results: N is increasing in the ecosystem at 0. 2 g N m -2 year -2 year, but annual P inputs to this ecosystem are balanced by losses. Plant physiological measurements reveal that plant functional types differ in N versus P limitation, with trees showing a higher N limitation than ericaceous shrubs or Sphagnum moss, according to Biomass stoichiometry. Comparing our empirically-derived nutrient budgets to ELM-SPRUCE, a significant proportion of plant N and P. was found in the moss layer's storage and cycling of a significant proportion of plant N and P.

Source link: https://www.osti.gov/biblio/1811402


Deforestation strengthens atmospheric transport of mineral dust and phosphorus from North Africa to the Amazon

In the tropics, we use the Community Earth System Model to see how large-scale deforestation impacts mineral dust aerosol transport and deposition. In addition, the high pressure anomaly over the Sahara, which in turn, has boosted northeasterly winds across North Africa and the tropical North Atlantic Ocean, which has increased dust transportation to the South American continent. These interactions demonstrate how land surface changes can influence tropical nutrient cycling, which may have long-term effects on tropical ecosystem productivity and biodiversity.

Source link: https://www.osti.gov/biblio/1850957

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions