Extraction of cadmium from phosphoric acid by trioctylphosphine oxide/kerosene solvent using factorial design

Kherfan, Sadeddin

doi:10.3311/pp.ch.2011-2.01

Cited by 8 publications

(3 citation statements)

References 7 publications

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“…Calcination , and solvent extraction from phosphate ore , or phosphoric acid − are three basic methods for the decadmiation of phosphate fertilizers that are commonly listed in the literature. Neither of them is currently used in the industry due to their high cost.…”

Section: Introductionmentioning

confidence: 99%

Thermal Characteristics of Selected Phosphate Ores and the Effect of Inorganic Salts on Their Calcination

Zieliński,

Biegun,

Kaniewski

et al. 2023

ACS Omega

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Calcination of phosphate ore is one of the methods of ore processing, i.e., increasing the phosphorus content (P2O5) in the ore. However, this process is very energy-intensive and not economically justified in most cases. It can be improved by using additives to lower the required calcination temperature. In this work, several samples of phosphate ores were subjected to thermal analysis using thermogravimetry coupled with mass spectrometry (TG-MS) to study their behavior during the calcination process. Then, selected phosphate ore from the Tunisian deposit was mixed with NaCl, KNO3, or Na2CO3 and calcined in various regimes (temperature and time). Uncalcined samples, together with obtained calcinates, were also subjected to thermal analysis by TG-MS. Temperature ranges in which the mass loss occurred were defined and discussed. Appropriate models of sample weight loss were derived and visualized by using the response surface methodology. Explanations of possible processes observed during the heating of phosphate ore samples with inorganic salt addition were proposed.

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Section: Introductionmentioning

confidence: 99%

Thermal Characteristics of Selected Phosphate Ores and the Effect of Inorganic Salts on Their Calcination

Zieliński,

Biegun,

Kaniewski

et al. 2023

ACS Omega

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“…Almela [1] was able to extract up to 90% of the Cd(II) from phosphoric acid with the commercial product bis (2,4,4-trimethylpentyl) thiophosphinic acid (cyanex 302) diluted in kerosene. Kherfan [2] pointed out that the extraction of cadmium from phosphoric acid could be performed with the solvent TOPO (trioctyl phosphine oxide) diluted in kerosene. Elyahyaoui [3] verified that DHEHP remains the best extractant of cadmium from phosphoric acid, comparing it either by tributylphosphate (TBP), trioctyl phosphine oxide (TOPO), triphenyl phosphine oxide (TPPO), or diphenylamine used individually or mixed.…”

Section: Introductionmentioning

confidence: 99%

Extraction of cadmium from phosphoric acid by a synthesized extracting agent

Berkalou¹,

Nounah²,

Khamar³

et al. 2020

E3S Web Conf.

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The Purification of phosphoric acid used several extractants from the family of oxygenates, sulfurous or amino compounds. In this work, we were interested in the synthesis, physico-chemical and spectroscopic characterization, and use of the product C11H18N2O as an extractant of cadmium from phosphoric acid. The synthesized product was characterized by: infrared spectroscopy, nuclear magnetic resonance, and mass spectroscopy. Solubility tests in different solvents have been carried out. Subsequently, liquid-liquid extraction of cadmium from phosphoric acid was carried out using C11H18N2O as an extractant diluted in benzene. The study investigated the influence of concentration of phosphoric acid and the extracting agent. The result obtained ensure that our synthesized product is promising. The percentage of cadmium extraction from phosphoric acid reached 98.58% at a concentration of 2.5M phosphoric acid and an optimal concentration of 0.5×10-2 M of synthesized extractant.

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“…Common sources of heavy metals include mining, industrial wastes, vehicle emissions, lead-acid batteries, paints, fertilizers, treated woods, aging water supply infrastructure etc. [6][7][8]. Solvent extraction is a way of separating solutes through two solvents (usually liquid) that can dissolve the substances of solutes, but both these solvents are immiscible.…”

Section: Introductionmentioning

confidence: 99%

Effect of pH, Anions and Acids on the Extraction of Zinc (II) from Aqueous media using Acetylacetone Solutions of Sulphamethoxazole

Nwadire¹,

Odoemelam²,

Ubani³

et al. 2020

JCSN

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The challenge of heavy metal contaminations have been remediated to a certain level by the application of several methods of their extractions from aqueous media. Solvent extraction of zinc (II) ions from buffered aqueous solutions into acetylacetone solution of sulphamethoxazole as a function of pH and concentration of anionic substances and certain mineral acids were investigated in this work. The aqueous medium was prepared by dissolving 1.0995g of ZnSO4.7H2O in 250 ml volumetric flask to form 1000mg/L solution. 50mg/L working concentration was prepared from the 1000mg/L by dilution method. The organic phase is 0.5 M Sulfamethoxazole solution prepared by dissolving 12.664g of the salt in 100 ml acetylacetone. 2 ml each of aqueous and organic phases were taken with micro pipette and transferred into a set of 20 ml extraction bottle and the mixture was agitated mechanically for about 30 minutes. The mixture was allowed to settle and separate into two layers. 1 ml of the aqueous phase was taken, diluted and analysed for Zn (II) ions using atomic absorption spectrophotometer at a wavelength of 213.9. The results obtained on studying the effect of pH showed that Zn (II) ion was quantitatively extracted between pH of 7.0 to pH 8.0. The highest percentage extraction 85.37% was observed at pH 8.0 in acetylacetone solution of sulphamethoxazole. Increase in pH above 8.0 resulted in a steady decrease in the extraction of Zn (II). Studies on the effect of anions showed significant extractions which changes as the anions concentrations increased. All studies on mineral acids also showed significant extractions and increase in the concentrations of the acids affected the percentage extraction. Generally Zinc (II) ions can be extracted quantitatively in mild acids and anions concentrations when buffered from slightly acidic pH ranges of 6.0 to slightly alkaline pH values of 8.5.

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Extraction of cadmium from phosphoric acid by trioctylphosphine oxide/kerosene solvent using factorial design

Cited by 8 publications

References 7 publications

Thermal Characteristics of Selected Phosphate Ores and the Effect of Inorganic Salts on Their Calcination

Thermal Characteristics of Selected Phosphate Ores and the Effect of Inorganic Salts on Their Calcination

Extraction of cadmium from phosphoric acid by a synthesized extracting agent

Effect of pH, Anions and Acids on the Extraction of Zinc (II) from Aqueous media using Acetylacetone Solutions of Sulphamethoxazole

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