Study of the interaction of mono-, di-, and trisubstituted sodium orthophosphates with thermally activated dolomite

Иванец, А. И.; Шашкова, И. Л.; Китикова, Н. В.; Kul’bitskaya, L. V.; Matrunchik, Yu. V.

doi:10.1134/s10704272150110038

Cited by 4 publications

(2 citation statements)

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“…Since adsorption is not a destructive technique, some materials release the nutrient after the treatment, thus attending the demands of a circular economy (Kasprzyk and Gajewska, 2019). Recent research has proposed a variety of adsorbents including layered chalcogenide (Li et al, 2019), nano-porous calcined palygorskite embedded with La(OH) 3 (Kong et al, 2018), acid-activated akadama clay (a Japanese volcanic soil) (Wang et al, 2018), magnetically recoverable magnetite/lanthanum hydroxide (Fang et al, 2018), hydrothermally synthesized lanthanum carbonate nanorods (Koh et al, 2020), thermally activated dolomite (Ivanets et al, 2015(Ivanets et al, , 2016, zirconium/magnesium modified bentonite (Lin et al, 2020), etc. Clay minerals have gained interest because they are abundant in nature and are environmentally compatible. Montmorillonites, like other smectites, have permanent negative charges generated by the isomorphic substitutions of Si 4þ by Al 3þ in the tetrahedral sheets, and of Al 3þ by Mg 2þ in the octahedrons.…”

Section: Introductionmentioning

confidence: 99%

Fe(III)-polyhydroxy cations supported onto K10 montmorillonite for removal of phosphate from waters

Leite

Nascimento

Masini

2020

Heliyon

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Since phosphate is strongly related to eutrophication of environmental waters, several research groups quest for materials that can efficiently remove phosphate from wastewaters before it contaminates lakes and reservoirs. In the present work, a commercial clay mineral (K10 montmorillonite) modified with Fe 3þ polyhydroxy cations was investigated as an adsorbent for phosphate. The incorporation of the polycations did not alter the main conformational characteristics of the montmorillonite, as verified by specific surface area measurements, X-ray diffractometry, FTIR, electron microscopy, and zeta potential titrations. On the other hand, the materials supporting Fe 3þ polyhydroxy cations exhibited a significant enhancement of adsorption capacity, as determined by Langmuir-Freundlich isotherms, from 39 AE 2 to 104 AE 15 μmol g À1 . The different ratios of OH À to Fe 3þ did not affect the adsorption capacities. The adsorption kinetics was best described by the pseudo 2 nd order model, approaching the equilibrium after 120 min of contact time. A variation of pH between 4.6 and 8.5 did not affect the adsorption percentages. The adsorption capacities increased with the increase of the ionic strength, thus suggesting that the formation of inner-sphere complexes prevails over electrostatic interactions as the adsorption mechanism. The materials removed phosphate from three polluted water samples having phosphate concentrations between 0.0919 and 1.211 mg L À1 . The remaining phosphate concentration was below the limit of quantification of the analytical method (0.063 mg L À1 in P, or 2.0 μmol L À1 ). The presence of 10 mg L À1 humic of fulvic acid did not affect the performance of the materials. In conclusion, the modification of clay minerals with Fe 3þ polyhydroxy cations is useful in producing low-cost adsorbents for phosphate.

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Section: Introductionmentioning

confidence: 99%

Fe(III)-polyhydroxy cations supported onto K10 montmorillonite for removal of phosphate from waters

Leite

Nascimento

Masini

2020

Heliyon

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“…For instance, Chen et al [ 16 ] revealed that a high nitrate removal rate (706 mg/L) could be achieved by a methane-based membrane biofilm reactor. Similarly, Ivanets et al [ 17 ] reported that thermally treated (800 °C) dolomite could effectively bind 0.75 to 3.0 mmol/g of phosphorus. Interestingly, the deposition of LDH on the biochar matrix was revealed as a favorable method to substantially improve the resultant material properties, showing remarkable removal performance for water contaminants due to the synergistic effect of biochar and LDH [ 18 ].…”

Section: Introductionmentioning

confidence: 95%

Magnetic Mg-Fe/LDH Intercalated Activated Carbon Composites for Nitrate and Phosphate Removal from Wastewater: Insight into Behavior and Mechanisms

et al. 2020

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This experimental work focused on the synthesis, characterization, and testing of a unique, magnetically separable, and eco-friendly adsorbent composite material for the advanced treatment and efficient removal of nitrate and phosphate pollutants from wastewater. The MgAl-augmented double-layered hydroxide (Mg-Fe/LDH) intercalated with sludge-based activated carbon (SBAC-MgFe) composites were characterized by FT-IR, XRD, BET, VSM, SEM, and TEM techniques, revealing homogeneous and efficient dispersion of MgFe/LDH within the activated carbon (AC) matrix, a highly mesoporous structure, and superparamagnetic characteristics. The initial solution pH, adsorbent dose, contact time, and temperature parameters were optimized in order to reach the best removal performance for both pollutants. The maximum adsorption capacities of phosphate and nitrate were found to be 110 and 54.5 mg/g, respectively. The competition between phosphate and coexisting ions (Cl−, CO32−, and SO42−) was studied and found to be remarkably lower in comparison with the nitrate adsorption. The adsorption mechanisms were elucidated by kinetic, isotherm, thermodynamic modeling, and post-adsorption characterizations of the composite. Modeling and mechanistic studies demonstrated that physisorption processes such as electrostatic attraction and ion exchange mainly governed the nitrate and phosphate adsorption. The composite indicated an outstanding regeneration performance even after five sequences of adsorption/desorption cycles. The fabricated composite with magnetically separable characteristics can be used as a promising adsorbent for the removal of phosphate and nitrate pollutants from wastewater.

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Non-acidic synthesis of phosphatized dolomite and its sorption behaviour towards Pb 2+, Zn2+, C

Иванец

Китикова

Шашкова

et al. 2016

Environmental Technology & Innovation

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Study of the interaction of mono-, di-, and trisubstituted sodium orthophosphates with thermally activated dolomite

Cited by 4 publications

References 9 publications

Fe(III)-polyhydroxy cations supported onto K10 montmorillonite for removal of phosphate from waters

Fe(III)-polyhydroxy cations supported onto K10 montmorillonite for removal of phosphate from waters

Magnetic Mg-Fe/LDH Intercalated Activated Carbon Composites for Nitrate and Phosphate Removal from Wastewater: Insight into Behavior and Mechanisms

Non-acidic synthesis of phosphatized dolomite and its sorption behaviour towards Pb 2+, Zn2+, C

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