Recovery and separation of phosphorus as dicalcium phosphate dihydrate for fertilizer and livestock feed additive production from a low-grade phosphate ore

Anawati, John; Azimi, Gisele

doi:10.1039/d0ra07210a

Cited by 16 publications

(9 citation statements)

References 39 publications

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“…The Na-EDTA leachant released on average 890 mg L −1 which was on average about 35%. The EDTA enables the formation of complexes with Fe 3+ ions, thus stabilizing them in the solution, which prevents their co-precipitation with phosphorus (Anawati and Azimi 2020 ). Here, in the leachates of fraction F2 the highest concentrations of trace elements were detected.…”

Section: Resultsmentioning

confidence: 99%

“…Ruan et al ( 2019 ) and Anawati and Azimi ( 2020 ) indicated that Al 2 O 3 + Fe 2 O 3 > 3 wt% and presence of impurities such as chlorine, fluorine, strontium, and heavy metals can affect P 2 O 5 recovery and unwanted crystallization of Al and Fe salts. These salts are characterized by low solubility and low plant availability (Kalmykova and Karlfeldt Fedje, 2013 ).…”

Section: Resultsmentioning

confidence: 99%

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The assessment of phosphorus recovery potential in sewage sludge incineration ashes — a case study

Kasina

2022

Environ Sci Pollut Res

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A sewage sludge incineration ash contains large amounts of phosphorus, which are considered as a novel anthropogenic waste–based substitute for phosphorus natural resources. Phosphorus is accumulated at most in phosphate minerals of whitlockite structure, that contain Fe, Ca, and Mg and in the matrix composed of Si, Al, Fe, Ca, P, Mg, K, Na in various proportions. The goal of this study was to estimate phosphorus recovery potential. A four-stage sequential extraction, following the modified Golterman procedure, was applied. Separation of four independent fractions enabled to understand better the manner of phosphorus occurrence in the studied ash. The results of the extraction indicated the greatest release of phosphorus combined with organic matter using sulfuric acid. The release was on average at the level of 64%. The chelating Na-EDTA compound indicated lower ability to extract phosphorus (at the level of 35%), and the highest ability to extract heavy metals and potentially toxic elements (As, Zn, Mo). The sequential extraction led to the total recovery of phosphorus of around 40–60%

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

The assessment of phosphorus recovery potential in sewage sludge incineration ashes — a case study

Kasina

2022

Environ Sci Pollut Res

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“…[12,13] Hence phosphate form an integral part of agriculture industry, fertilizers, food additives and medicine. [14][15][16][17][18] However, if present in excess the phosphates can cause other health issues like abnormal renal function and can impact ecological balance. Excessive introduction of phosphate fertilizers into the water bodies can lead to algae proliferation [19] and ultimately eutrophication of aquatic systems.…”

Section: Introductionmentioning

confidence: 99%

Click‐Generated Triazole‐Based Silanes: A Potent Chemosensor for Dihydrogen Phosphate

et al. 2023

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Over the years, ground and surface water has been reported to be contaminated with phosphates. These phosphates are known to cause various diseases and if present in excess can lead to eutrophication. The known silane chemistry has not been thoroughly investigated for the sensing of anions. In the current study four new triazole based silanes have been prepared by the renowned Click Chemistry for the selective and sensitive detection of dihydrogen phosphate. The synthesized compounds were well characterized by various spectroscopic techniques and their absorptive and emissive responses were investigated for the recognition of dihydrogen phosphate ions. The binding ratio between triazole based silane chemosensor and dihydrogen phosphate has been discovered from Job's plot and was also confirmed by non‐linear fitting method. The value of association constant was found to be 571.18 M−1. The limit of detection (LOD) and limit of quantitation (LOQ) were calculated by fluorescence spectroscopy. The results obtained clearly illustrated that triazole based silane could be used as a potent chemosensor for selective and sensitive recognition of dihydrogen phosphate. Further, the possible binding site of chemosensor for dihydrogen phosphate has been identified from 1H NMR studies and DFT calculations. At last real sample analysis was performed to check the practical applicability of chemosensor.

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“…In addition, we compare predicted bioaccessibilities using another geochemical modelling package, OLI Studio, and its built-in thermochemical framework (80 inorganic elements of the periodic table, and their associated aqueous species, as well as over 8000 organic species) [30]. As far as we are aware, this package has not been applied to the prediction of bioaccessibility, though it has been used in environmental applications [31][32][33].…”

Section: Introductionmentioning

confidence: 99%

New Insights into Health Risk Assessments for Inhalational Exposure to Metal(loid)s: The Application of Aqueous Chemistry Modelling in Understanding Bioaccessibility from Airborne Particulate Matter

et al. 2021

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Aqueous modelling of chemical speciation in simulated lung fluid (SLF) enables a better understanding of the underlying chemical factors that influence metal(loid) inhalation bioaccessibility from airborne particulate matter. Such an approach can be used to supplement experimental techniques that are integral to the health risk assessment of metal(loid) exposure by inhalational routes. In this paper, we modelled the aqueous chemistry of airborne particulate-bound metal(loid)s (As, Cu, Mn, Pb and Zn) in a SLF based on Gamble’s solution (neutral pH). The modelling was performed using two software packages (Geochemist’s Workbench 14 and OLI Studio 9.5) and a total of five thermochemical databases (GWB Thermo, MINTEQ, PHREEQC, WATEQ4F and the default database for OLI Studio). Modelled results were compared with experimentally determined bioaccessibilities for the NIST 2710a standard reference material (SRM) and with literature-reported bioaccessibilities for NIST 1648a and BCR 038 SRMs. Whilst the models correctly describe the observed increase in bioaccessibility for more dilute solid/liquid extraction ratios, the performance of the models against the fractional bias of the mean (FBmean) and the normalised mean square error (NMSE) statistical metrics was generally outside the acceptance criteria. Findings from an analysis of the main aqueous chemical species predicted to be present in SLF indicate that carbonate and chloride complexes of Cu, Mn, Pb and Zn predominate, whilst free cations (for Cu, Mn and Zn) and hydroxides (for Cu) also play a role in solubilisation. Arsenic is not predicted to form significant complexes with the SLF components and is present in solution mainly as the HAsO42− ion and its conjugate acid, H2AsO4−. For modelled runs where glycine and citrate were present, significant increases in the bioavailability of Cu and Zn were predicted as a result of complexation with these ligands. An additional finding from our experimental bioaccessibility results for NIST 2710a was that the inclusion of the lung fluid surfactant dipalmitoylphosphatidylcholine (DPPC) in the SLF did not significantly affect the bioaccessibility. Our study provides useful insights into the likely aqueous- and solid-phase speciation of metal(loid)s in SLF and highlights that future developments in this area should consider the role of mineralogy and surface interactions.

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Recovery and separation of phosphorus as dicalcium phosphate dihydrate for fertilizer and livestock feed additive production from a low-grade phosphate ore

Abstract: A closed loop process was developed to extract phosphorus as dicalcium phosphate dihydrate from a low-grade ore for fertilizers and livestock feed additive production.

Cited by 16 publications

References 39 publications

The assessment of phosphorus recovery potential in sewage sludge incineration ashes — a case study

The assessment of phosphorus recovery potential in sewage sludge incineration ashes — a case study

Click‐Generated Triazole‐Based Silanes: A Potent Chemosensor for Dihydrogen Phosphate

New Insights into Health Risk Assessments for Inhalational Exposure to Metal(loid)s: The Application of Aqueous Chemistry Modelling in Understanding Bioaccessibility from Airborne Particulate Matter

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