Showing papers on "Phosphorus published in 2021"
TL;DR: In this article, a review of different mechanisms and modes of action of phosphate-solubilizing microorganisms, their contribution to phosphorus solubilization, growth-promoting attributes in plants, and the molecular aspects of phosphatization are discussed.
Abstract: Phosphorus is the second most critical macronutrient after nitrogen required for metabolism, growth, and development of plants. Despite the abundance of phosphorus in both organic and inorganic forms in the soil, it is mostly unavailable for plant uptake due to its complexation with metal ions in the soil. The use of agrochemicals to satisfy the demand for phosphorus to improve crop yield has led to the deterioration of the ecosystem and soil health, as well as an imbalance in the soil microbiota. Consequently, there is a demand for an alternate cost-effective and eco-friendly strategy for the biofortification of phosphorus. One such strategy is the application of phosphate-solubilizing microorganisms which can solubilize insoluble phosphates in soil by different mechanisms like secretion of organic acids, enzyme production, and excretion of siderophores that can chelate the metal ions and form complexes, making phosphates available for plant uptake. These microbes not only solubilize phosphates but also promote plant growth and crop yield by producing plant-growth-promoting hormones like auxins, gibberellins, and cytokinins, antibiosis against pathogens, 1-aminocyclopropane-1-carboxylic acid deaminase which enhances plant growth under stress conditions, improving plant resistance to heavy metal toxicity, and so on. Pyrroloquinoline quinine (pqq) and glucose dehydrogenase (gcd) are the representative genes for phosphorus solubilization in microorganisms. The content presented in this review paper focuses on different mechanisms and modes of action of phosphate-solubilizing microorganisms, their contribution to phosphorus solubilization, growth-promoting attributes in plants, and the molecular aspects of phosphorus solubilization.
132 citations
TL;DR: In this paper, the combined effect of microplastic and arsenic pollution on rice rhizosphere soil was investigated, and the effect of these pollutants on microorganisms and nutrients was elucidated.
123 citations
TL;DR: In this article, the authors present an overview of the phosphorus and nitrogen fate during the Hydrothermal Carbonization (HTC) process from a perspective of nutrient recovery, presenting existing technologies and future trends.
75 citations
China Agricultural University1, Nanyang Technological University2, United States Department of Agriculture3, King Abdulaziz University4, University of Wuppertal5, Cairo University6, Taif University7, University of Western Australia8, Korea University9, Hong Kong Polytechnic University10, Sejong University11
TL;DR: In this paper, the authors investigated the effects of acid substrates on the humification and/or P migration as well as on microbial succession during the swine manure composting, employing multivariate and multiscale approaches.
69 citations
TL;DR: In this article, the authors proposed to activate the charred fermentation residues via calcium chloride and use the resulting sorbent to capture phosphorus (P) out of the fermentation residue's liquid fraction.
67 citations
TL;DR: Wang et al. as mentioned in this paper synthesize a recyclable iron-loaded aminated polyacrylonitrile fiber (PANAF-Fe) through a facile chemical grafting reaction for phosphate removal from wastewater.
67 citations
TL;DR: The mechanisms, performance, and influential factors affect phosphorus recovery from membrane separation are reviewed and will serve as a basis for future research and development of phosphorus recovery by membrane separation processes and as a response to the increasingly pressing issues of eutrophication and the growing depletion of phosphorus resources.
64 citations
TL;DR: In this article, the performance of non-aerated microalgal-bacterial granular sludge (MBGS) process in municipal wastewater treatment at different temperatures was investigated.
62 citations
TL;DR: In this article, the authors reported on the newly isolated Thauera sp. RT1901, which is capable of denitrification using variety carbon sources including aromatic compounds, and the annotated genome was used to reconstruct the complete nitrogen and phosphorus metabolism pathways of RT191.
60 citations
TL;DR: Phosphorus, a 5A element with atomic weight of 31, comprises just over 0.6% of the composition by weight of plants and animals and is a key element in organic molecules involved in a wide variety of essential cellular functions.
Abstract: Phosphorus, a 5A element with atomic weight of 31, comprises just over 0.6% of the composition by weight of plants and animals. Three isotopes are available for studying phosphorus metabolism and kinetics. 31P is stable, whereas the radioactive isotope 33P has a half-life of 25 days and 32P has a half-life of 14 days. Phosphate ester and phosphoanhydride are common chemical linkages and phosphorus is a key element in organic molecules involved in a wide variety of essential cellular functions. These include biochemical energy transfer via adenosine triphosphate (ATP), maintenance of genetic information with nucleotides DNA and RNA, intracellular signaling via cyclic adenosine monophosphate (cAMP), and membrane structural integrity via glycerophospholipids. However, this review focuses on the metabolism of inorganic phosphorus (Pi) acting as a weak acid. Phosphoric acid has all three hydrogens attached to oxygen and is a weak diprotic acid. It has 3 pKa values: pH 2.2, pH 7.2, and pH 12.7. At physiological pH of 7.4, Pi exists as both H2PO4(−) and HPO4(2−) and acts as an extracellular fluid (ECF) buffer. Pi is the form transported across tissue compartments and cells. Measurement of Pi in biological fluids is based on its reaction with ammonium molybdate which does not measure organic phosphorus. In humans, 80% of the body phosphorus is present in the form of calcium phosphate crystals (apatite) that confer hardness to bone and teeth, and function as the major phosphorus reservoir (Fig. 1). The remainder is present in soft tissues and ECF. Dietary phosphorus, comprising both inorganic and organic forms, is digested in the upper gastrointestinal tract. Absorbed Pi is transported to and from bone, skeletal muscle and soft tissues, and kidney at rates determined by ECF Pi concentration, rate of blood flow, and activity of cell Pi transporters (Fig. 2). During growth, there is net accretion of phosphorus, and with aging, net loss of phosphorus occurs. The bone phosphorus reservoir is depleted and repleted by overall phosphorus requirement. Skeletal muscle is rich in phosphorus used in essential biochemical energy transfer. Kidney is the main regulator of ECF Pi concentration by virtue of having a tubular maximum reabsorptive capacity for Pi (TmPi) that is under close endocrine control. It is also the main excretory pathway for Pi surplus which is passed in urine. Transcellular and paracellular Pi transports are performed by a number of transport mechanisms widely distributed in tissues, and particularly important in gut, bone, and kidney. Pi transporters are regulated by a hormonal axis comprising fibroblast growth factor 23 (FGF23), parathyroid hormone (PTH), and 1,25 dihydroxy vitamin D (1,25D). Pi and calcium (Ca) metabolism are intimately interrelated, and clinically neither can be considered in isolation. Diseases of Pi metabolism affect bone as osteomalacia/rickets, soft tissues as ectopic mineralization, skeletal muscle as myopathy, and kidney as nephrocalcinosis and urinary stone formation.
57 citations
TL;DR: In this article, a review of the regulation mechanisms of biochar and humic substances on phosphorus availability and circulation, including improving soil physicochemical characteristics, regulating microbial community structure, and directly interacting with phosphorus to affect the fate of phosphorus in soil.
TL;DR: In this paper, the root system architecture (RSA) affects a plant's ability to obtain phosphate, the major form of phosphorus that plants uptake, and the relationship between RSA and plant phosphorus-acquisition efficiency is discussed.
Abstract: Phosphorus is an essential macronutrient for plant growth and development. Root system architecture (RSA) affects a plant's ability to obtain phosphate, the major form of phosphorus that plants uptake. In this review, I first consider the relationship between RSA and plant phosphorus-acquisition efficiency, describe how external phosphorus conditions both induce and impose changes in the RSA of major crops and of the model plant Arabidopsis, and discuss whether shoot phosphorus status affects RSA and whether there is a universal root developmental response across all plant species. I then summarize the current understanding of the molecular mechanisms governing root developmental responses to phosphorus deficiency. I also explore the possible reasons for the inconsistent results reported by different research groups and comment on the relevance of some studies performed under laboratory conditions to what occurs in natural environments.
TL;DR: In this article, the exact tuning of the chemical environment of neighboring atomic FeN4 sites is discussed for optimizing Fe-N-C catalysts to produce the fast oxygen reduction reaction (ORR) kinetics.
Abstract: Precise tuning of the chemical environment of neighboring atomic FeN4 sites is extremely important for optimizing Fe–N–C catalysts to produce the fast oxygen reduction reaction (ORR) kinetics both ...
TL;DR: The feasibility of coupling simultaneous partial nitrification and denitrification (SPND) to biological phosphorus removal in continuous-flow intermittently-aerated moving bed biofilm reactors (MBBRs) fed with different carbon sources, i.e., ethanol and acetate, was investigated in this paper.
TL;DR: The three large marine ecosystems (LMEs) bordering China (Yellow Sea/Bohai Sea, East China Sea, and South China Sea) have received excess nitrogen (N) and phosphorus (P) in the past decades with de...
Abstract: The three large marine ecosystems (LMEs) bordering China (Yellow Sea/Bohai Sea, East China Sea, and South China Sea) have received excess nitrogen (N) and phosphorus (P) in the past decades with de...
TL;DR: In this article, the authors systematically overviewed and compared the phosphorous (sub-)species and fractions in waste activated sludge and chemically enhanced primary sludge, and found that phosphorus removal method and sludge treatment process are the dominant factors.
TL;DR: In this article, the authors present a method to extract phosphorus (P) with high recovery potential from incinerated sewage sludge ash (ISSA) in the form of pyrolysis.
Abstract: Incinerated sewage sludge ash (ISSA) is produced worldwide where incineration is used to manage sewage sludge. ISSA contains significant amounts of phosphorus (P) with high recovery potential, and ...
TL;DR: In this article, the authors explore long-standing observations that microbes increase the production of redox-active antibiotics under phosphorus limitation, and show that phenazines are regulated by phosphorus, solubilize phosphorus through reductive dissolution of iron oxides in the lab and field, and increase phosphorus-limited microbial growth.
Abstract: Microbial production of antibiotics is common, but our understanding of their roles in the environment is limited. In this study, we explore long-standing observations that microbes increase the production of redox-active antibiotics under phosphorus limitation. The availability of phosphorus, a nutrient required by all life on Earth and essential for agriculture, can be controlled by adsorption to and release from iron minerals by means of redox cycling. Using phenazine antibiotic production by pseudomonads as a case study, we show that phenazines are regulated by phosphorus, solubilize phosphorus through reductive dissolution of iron oxides in the lab and field, and increase phosphorus-limited microbial growth. Phenazines are just one of many examples of phosphorus-regulated antibiotics. Our work suggests a widespread but previously unappreciated role for redox-active antibiotics in phosphorus acquisition and cycling.
TL;DR: In this article, the phosphorus nanoparticles have been rationally encapsulated into a commercial porous carbon through an evaporation-condensation strategy to achieve a high-energy and long-life PIB.
01 Jan 2021
TL;DR: In this article, the authors have shown that arsenic toxicity is becoming a threat to the environment due to its elevated levels in the soil, water, vegetables, and crops worldwide, and that arsenic strongly interacts with iron (Fe), sulfur (S), and phosphorus (P) in agronomic soils.
Abstract: Elevation of arsenic (As) toxicity is becoming a threat to the environment due to its elevated levels in the soil, water, vegetables, and crops worldwide. Arsenic strongly interacts with iron (Fe), sulfur (S), and phosphorus (P) in agronomic soils. Iron and S strongly bind As in soils and thus reduce As bioavailability for plant uptake. The presence of phosphate [PO4]− 3 triggers As transportation that results in the accumulation of high concentrations of As in rice and other crops. Arsenate [As(V)] is a phosphate [PO4]− 3 analog that enters plant cell via phosphate transport system and interrupts phosphate metabolism. Plants do not have such a mechanism to cope with As(V) uptake in roots. So the applications of P fertilizers to restrict As loading in plants is not a good practice. Sulfur plays a major part in As detoxification by forming arsenite [As(III)] complex with thiol peptides. This complex formation binds As in the roots of plants and resists As translocation. Likewise, Fe also plays a crucial role in the biogeochemical processes of As with Fe oxyhydroxides on the soil and root surface of wetland plants acting as a strong adsorbent for As. Oxidation of Fe(II) and precipitation of Fe(III) on the root surface produce Fe plaques in the rhizosphere of rice. The application of ferrous sulfate also reduces As toxicity to rice, resulting in high grain nutritional yield and decrease grain As loading.
TL;DR: In this paper, the role of iron in nitrogen and phosphorus removal is discussed, and theoretical support for improving effiencies of wastewater treatment to a certain extent is provided, which suggests that iron-based materials play a critical role in the biological removal process.
TL;DR: In this paper, the authors examined the global-scale latitudinal pattern of terrestrial phosphorus limitation by analysing a total of 1068 observations of aboveground plant production response to phosphorus additions at 351 forest, grassland or tundra sites that are distributed globally.
Abstract: Phosphorus limitation on terrestrial plant growth is being incorporated into Earth system models. The global pattern of terrestrial phosphorus limitation, however, remains unstudied. Here, we examined the global-scale latitudinal pattern of terrestrial phosphorus limitation by analysing a total of 1068 observations of aboveground plant production response to phosphorus additions at 351 forest, grassland or tundra sites that are distributed globally. The observed phosphorus-addition effect varied greatly (either positive or negative), depending significantly upon fertilisation regime and production measure, but did not change significantly with latitude. In contrast, phosphorus-addition effect standardised by fertilisation regime and production measure was consistently positive and decreased significantly with latitude. Latitudinal gradient in the standardised phosphorus-addition effect was explained by several mechanisms involving substrate age, climate, vegetation type, edaphic properties and biochemical machinery. This study suggests that latitudinal pattern of terrestrial phosphorus limitation is jointly shaped by macro-scale driving forces and the fundamental structure of life.
TL;DR: The red phosphorus (RP) anode has attracted great attention due to its high theoretical specific capacity (2596 mAh/g) and suitable lithiation potential as mentioned in this paper, but it has a poor electrical conductivity.
Abstract: The red phosphorus (RP) anode has attracted great attention due to its high theoretical specific capacity (2596 mAh/g) and suitable lithiation potential. To solve the inherent poor electrical condu...
TL;DR: In this article, the presence of emerging micropollutants (EMPs) hinders its applications in resource recovery, and the authors propose a solution to overcome the problem of EMPs in domestic wastewater.
Abstract: Domestic wastewater is a valuable reservoir of nutrients such as nitrogen and phosphorus. However, the presence of emerging micropollutants (EMPs) hinders its applications in resource recovery. In ...
TL;DR: In this article, a simple and clean thermally treating route has been proposed for preparing calcium-containing biochar from paper mill sludge, which can be used as phosphorus removal adsorbent after calcination.
TL;DR: In this article, a composite membrane with dual functions of adsorption and filtration was proposed to remove phosphorus from diluted wastewaters, which achieved a capacity of 48.8mg-P/g at pH 7.0 with simulated phosphorus solution.
TL;DR: In this article, the authors reviewed the development of electrochemically induced precipitation systems toward P removal and recovery over the past ten years, and summarized and discussed the effects of pH, current density, electrode configuration, and water matrix on the performance of electrochemical systems.
TL;DR: The magnetic lignin-based nanoparticles have a promising application potential as an efficiently separated and renewable nanomaterial for removal of low concentration phosphate in wastewater treatment and as a slow-release fertilizer in sustainable agriculture.
TL;DR: In this paper, the authors systematically discuss the microbial diversity and metabolic response to a range of environmental conditions and process control strategies in enhanced biological phosphorus removal (EBPR) and show that a wide range of carbon substrates and electron acceptors utilized by polyphosphate accumulating organisms (PAOs) can influence interactions with microbial community members and determine overall phosphorus removal efficiency.
TL;DR: In this paper, a phosphorus (P) vapor assisted synthetic strategy was employed to fabricate the P-doped hollow g-C3N4 photocatalysts with ultrathin shell structure.
Abstract: The design and synthesis of g-C3N4 with favourable physical-chemical architecture are important factors in influencing its photoactivity. Herein, a phosphorus (P) vapor assisted synthetic strategy was employed to fabricate the P-doped hollow g-C3N4 photocatalysts with ultrathin shell structure (