Role of Processing Temperature and Time on the Hydrothermal Alteration of K-Feldspar Rock in Autoclave

Ciceri, Davide; Oliveira, Marcelo de; Chen, Dennis P.; Allanore, Antoine

doi:10.1007/s42461-020-00233-6

Cited by 7 publications

(2 citation statements)

References 21 publications

(48 reference statements)

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“…The P exists in the forms of its oxoanions such as H 2 PO 4 -, HPO 4 2and PO 4 3-in leaching solution so that anion exchange resins such as READF-(PG) are effective to recover these anionic species from leached liquor but recovery of cationic species such as Ca(II), Zn(II), K(I), etc are quite difficult by anion exchange resins, which needs cation exchanger for its effective recovery. Potassium plays a very important role in cellular homeostasis, plant growth, and crop production [9][10][11]. The application of potassium fertilizer in cropland is increased every year.…”

Section: Recovery Of Potassium From Incineration Ash Of Chicken Dropping (Iacd) By Sulphuric Acid Leaching Followed By Adsorption Usingmentioning

confidence: 99%

Recovery of Potassium from Incineration Ash of Chicken Dropping (IACD) by Sulphuric Acid Leaching Followed by Adsorption Using Orange Waste Gel

Paudyal

Inoue

Pangeni³

2021

J. Nepal Chem. Soc.

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Two types of leaching solution namely; aqua-regia and 1MH2SO4 were investigated for the leaching of K(I) from incineration ash of chicken dropping (IACD), in this study. SOJR and Na(I)-SOJR adsorbents were prepared from orange juice residue for the adsorption of K(I) from IACD leached liquor, which was compared with READF-(PG) and 200CT resin. The characterization of IACD leaching was done in EDX and FTIR spectroscopic techniques. Aqua-regia solution completely dissolved IACD and all the adsorbents. One molar sulphuric acid (1MH2SO4) solution was optimized for effective leaching of K(I) from the IACD sample. SOJR, Na(I)-SOJR, and 200CT adsorbed K(I) from leached liquor whereas K(I) was insignificantly adsorbed onto READF-(PG). The desorption of adsorbed K(I) could be successfully done by H2SO4 solution for recovery and adsorbent regeneration for further usage. From comparisons, Na(I)-SOJR investigated in this study was found to be equally effective with a commercially available cation exchanger (200CT resin). Therefore, a new method of H2SO4 leaching of IACD followed by adsorption using Na(I)-SOJR investigated in this work can be an economic, environmentally benign, and promising technique for the recovery of K(I) ion from leach liquor of IACD.

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Section: Recovery Of Potassium From Incineration Ash Of Chicken Dropping (Iacd) By Sulphuric Acid Leaching Followed By Adsorption Usingmentioning

confidence: 99%

Recovery of Potassium from Incineration Ash of Chicken Dropping (IACD) by Sulphuric Acid Leaching Followed by Adsorption Using Orange Waste Gel

Paudyal

Inoue

Pangeni³

2021

J. Nepal Chem. Soc.

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“…For instance, Liu et al (2019b) and Wang et al (2018) studied the recovery of potassium from potassic syenite, which contain 10.38% and 12.46% K 2 O, respectively [25,35]. Their results demonstrated the effectiveness of NaOH as an additive in an average temperature of 220 [36][37][38][39] for a reaction time between 0.5 and 8 h and a particle size ranging from 74 to 250 µm. These authors showed that hydrothermal treatment is effective for K release.…”

Section: Introductionmentioning

confidence: 99%

Alkali-Hydrothermal Treatment of K-Rich Igneous Rocks for Their Direct Use as Potassic Fertilizers

et al. 2021

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Due to the increasing demand for conventional sources of potassium (K) and their inaccessibility by African countries, K-rich igneous rocks are increasingly studied as potential alternative sources. In this study, six potassic igneous rocks (syenites and trachytes) from the Tamazeght, Jbel Boho, Ait Saoun, and El Glo’a regions (Morocco) were sampled and characterized. Then they were hydrothermally treated to enhance their K release for potential use as potassic fertilizers. The raw materials are mainly formed by microcline (up to 74%), orthoclase (20–68%), albite (36–57%), biotite-muscovite (15–23%), and titanite, calcite, hematite, and apatite as accessory minerals. These samples were crushed and milled to reach a particle size <150 µm and mixed with 4 N NaOH solution in an autoclave. The liquid/solid (L/S) ratio was about 44 mL/50 g. The powders were allowed to react with the solution at 170 °C for 7 h. For all tests, NaOH reacted completely with the powders and no liquid was observed after the treatment. X-ray diffraction (XRD), thermal gravimetric analysis (TGA), infrared spectroscopy (IRTF), and scanning electron microscopy (SEM-EDS) were carried out on treated samples to characterize the mineralogical and structural changes due to the alkali-hydrothermal treatment. Indeed, the treated samples revealed the presence of sodic neoformed phases such as thermonatrite, sodalite, analcime, and cancrinite. The treated material was leached for a week using deionized water and the elements released were measured using inductively coupled plasma–atomic emission spectroscopy (ICP-AES). The hydrothermal process showed a strong effect on structure breakdown as well as on the release of K and other nutrients such as P, Fe, Si, Mg, and Ca. Therefore, the alkali-hydrothermal treatment allowed the release of 50.5 wt% K. Moreover, the release of Mg, Ca, Fe, P, K, and Si were significantly increased. Mg, Ca, Fe, P, K, and Si release within raw materials was about (0.5–3.6), (3.5–31.4), (0.01–0.4), (0.01–0.3), (20–55), and (4.6–8) mg/kg, respectively, whereas treated samples showed a higher release of these elements. Quantitatively, Mg, Ca, Fe, P, K, and Si releases were about (10–11.8), (60–70), (7–20), (1.2–15), (218–1278), and (1119–2759) mg/kg, respectively. Consequently, the treated igneous rocks (syenite and trachyte) could be directly used as potassic fertilizers that would also be a source of other nutrients.

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Hydrothermal alkaline synthesis and release properties of silicon compound fertiliser using high-ash coal slime

Tian,

Dong,

Fan

et al. 2023

Environ Sci Pollut Res

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Role of Processing Temperature and Time on the Hydrothermal Alteration of K-Feldspar Rock in Autoclave

Abstract: is acknowledged for carrying out the hydrothermal processing batches. Ms. Kaitlyn Hennacy is acknowledged for collecting SEM images of Figure 2. Dr. Steve Miller (H&M Analytics) is acknowledged for collection of X-ray powder diffraction data and Rietveld refinements.

Cited by 7 publications

References 21 publications

Recovery of Potassium from Incineration Ash of Chicken Dropping (IACD) by Sulphuric Acid Leaching Followed by Adsorption Using Orange Waste Gel

Recovery of Potassium from Incineration Ash of Chicken Dropping (IACD) by Sulphuric Acid Leaching Followed by Adsorption Using Orange Waste Gel

Alkali-Hydrothermal Treatment of K-Rich Igneous Rocks for Their Direct Use as Potassic Fertilizers

Hydrothermal alkaline synthesis and release properties of silicon compound fertiliser using high-ash coal slime

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