Struvite formation and decomposition characteristics for ammonia and phosphorus recovery: A review of magnesium-ammonia-phosphate interactions

Tansel, Berrin; Lunn, Griffin M.; Monje, Oscar

doi:10.1016/j.chemosphere.2017.12.004

Cited by 244 publications

(117 citation statements)

References 81 publications

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“…In particular, the influence of foreign ions on struvite/hydroxyapatite nucleation and their crystallization is a crucial issue because of Ca and Mg are at the same time "impurities" in that solution from which the two Mg/Ca phosphate phases may precipitate. This mutual interference affects the growth rate, which in turn inhibits the increase of crystal size [36].…”

Section: Discussionmentioning

confidence: 99%

“…For this reason, untreated and treated specimens were initially analyzed at room temperature (rT); after that, the samples were heated at 400, 600 and 900 • C, and re-analyzed at rT after each heating process. The selection of the temperature steps used to investigate the T-induced "parent-to-product" phase transformation is driven by literature data [9,16,[31][32][33][34][35][36].…”

Section: Methodsmentioning

confidence: 99%

“…The heating at 400 °C induces the first phase variation, namely the total disappearance of the XRD peaks of struvite, due to the collapse of struvite into amorphous magnesium phosphate phases. Previous studies describe that heating induces a chain decomposition, involving the initial formation of amorphous magnesium hydrogen phosphate hydrate (MgHPO4·3H2O [36]), followed by its transformation into amorphous anhydrous magnesium hydrogen phosphate (MgHPO4 [32,35,36]). In this study, it was not possible to discriminate between the two amorphous products; thus, they are referred to a generic amorphous magnesium phosphate phases.…”

Section: Evidence Of Hap Formation By Thermal Treatmentsmentioning

confidence: 99%

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Diammonium Hydrogenphosphate Treatment on Dolostone: The Role of Mg in the Crystallization Process

et al. 2019

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The diammonium hydrogenphosphate (DAP, (NH4)2HPO4) reaction with calcite has been extensively investigated. The availability of free calcium ions in the reaction environment has been acknowledged as a crucial factor in the crystallization of calcium phosphates with a high (hydroxyapatite, Ca/P 1.67) or low Ca/P molar ratio (dicalcium phosphate dihydrate, Ca/P 1.00; octacalcium phosphate, Ca/P 1.33). On the contrary, no data are available on the DAP interaction at room temperature with dolomite in terms of reaction mechanism and composition of the reaction products. Here, a multi-analytical approach based on scanning electron microscopy (SEM) coupled with energy dispersive X-ray spectrometry (EDS) and X-ray powder diffraction before and after heating treatments is proposed to explore how the formation of calcium phosphates occur on Mg-enriched substrates and if the presence of magnesium ions during the reaction influences the crystallization process of calcium phosphates. The DAP reaction with polycrystalline dolomite gives rise to the formation of struvite and of poorly crystalline hydroxyapatite. Calcium and magnesium ions mutually interfered in the crystallization of magnesium and calcium phosphates, respectively, whose effects influenced the properties (size, micro-morphology, composition and crystallinity) of the newly-formed phases.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Evidence Of Hap Formation By Thermal Treatmentsmentioning

confidence: 99%

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Diammonium Hydrogenphosphate Treatment on Dolostone: The Role of Mg in the Crystallization Process

et al. 2019

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“…niger can transform insoluble manganese oxide minerals into manganese oxalate dihydrate (Wei et al ., ). Struvite consists of PO 4 3− (tetrahedral), Mg(6H 2 O) 2+ (octahedral) and NH 4 + (tetrahedral) (Tansel et al ., ). The transformation of struvite through the formation of glushinskite can be described by the following equation: Mg 2+ + 2C 2 O 4 2− ➔ Mg(C 2 O 4 ) 2 .…”

Section: Discussionmentioning

confidence: 97%

“…The most important elements in struvite (magnesium ammonium phosphate-MgNH 4 PO 4 Á6H 2 O) are phosphorus (P), nitrogen (N) and magnesium (Mg) (Tansel et al, 2018;Li et al, 2019) that are essential elements for all living organisms. P and Mg are well known for their involvement in ATP and nucleotide synthesis, ATP molecule normally occurring as a chelate with the Mg (Romani, 2013).…”

Section: Introductionmentioning

confidence: 99%

Biotransformation of struvite by Aspergillus niger: phosphate release and magnesium biomineralization as glushinskite

Suyamud

Ferrier

Csetényi

et al. 2020

Environmental Microbiology

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Summary Struvite (magnesium ammonium phosphate‐MgNH4PO4·6H2O), which can extensively crystallize in wastewater treatments, is a potential source of N and P as fertilizer, as well as a means of P conservation. However, little is known of microbial interactions with struvite which would result in element release. In this work, the geoactive fungus Aspergillus niger was investigated for struvite transformation on solid and in liquid media. Aspergillus niger was capable of solubilizing natural (fragments and powder) and synthetic struvite when incorporated into solid medium, with accompanying acidification of the media, and extensive precipitation of magnesium oxalate dihydrate (glushinskite, Mg(C2O4).2H2O) occurring under growing colonies. In liquid media, A. niger was able to solubilize natural and synthetic struvite releasing mobile phosphate (PO43−) and magnesium (Mg2+), the latter reacting with excreted oxalate resulting in precipitation of magnesium oxalate dihydrate which also accumulated within the mycelial pellets. Struvite was also found to influence the morphology of A. niger mycelial pellets. These findings contribute further understanding of struvite solubilization, element release and secondary oxalate formation, relevant to the biogeochemical cycling of phosphate minerals, and further directions utilizing these mechanisms in environmental biotechnologies such as element biorecovery and biofertilizer applications.

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Corn and soybean response to wastewater‐recovered and other common phosphorus fertilizers

Ylagan

Brye

Greenlee

2020

Agrosystems Geosci & Env

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Recycling P from wastewaters may provide a sustainable source of P that could also protect surface water quality from P enrichment. Struvite (MgNH 4 PO 4 ⋅6H 2 O) is a material that can be created from P-containing wastewater and has been shown to have agricultural fertilizer value. The objective of this study was to evaluate the effects of electrochemically precipitated struvite (ECST), chemically precipitated struvite (Crystal Green, CG), diammonium phosphate (DAP), monoammonium phosphate (MAP), rock phosphate (RP), and triple superphosphate (TSP) on corn (Zea mays L.) and soybean [Glycine max (L.) Merr.] response in a 79-d greenhouse pot study. Soybean aboveground dry matter (DM) and yield were unaffected by fertilizer-P treatments, but belowground, pod, and stem-plus-leaves tissue-P concentrations differed among fertilizer treatments. Total corn DM from ECST did not differ from that from RP and TSP but was 1.2 times greater than that from CG. Belowground corn DM from ECST was 1.9 times greater than that from CG, TSP, and DAP. Corn belowground tissue P concentration from CG did not differ from that from DAP, TSP, and MAP, but was 1.4 times larger than that from ECST. Corn cob-plus-husk tissue P concentration from ECST was similar to that from MAP and DAP and was 1.2 times greater than that from CG. Results of this study not only provide information on the relatively new ECST material, but also substantiate the need for additional research on struvite as a potential alternative fertilizer-P source and the potential impact on sustainable food production and water quality preservation.

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Struvite formation and decomposition characteristics for ammonia and phosphorus recovery: A review of magnesium-ammonia-phosphate interactions

Cited by 244 publications

References 81 publications

Diammonium Hydrogenphosphate Treatment on Dolostone: The Role of Mg in the Crystallization Process

Diammonium Hydrogenphosphate Treatment on Dolostone: The Role of Mg in the Crystallization Process

Biotransformation of struvite by Aspergillus niger: phosphate release and magnesium biomineralization as glushinskite

Corn and soybean response to wastewater‐recovered and other common phosphorus fertilizers

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