Microscopic, spectroscopic, and experimental approach towards understanding the phosphate adsorption onto Zn–Fe layered double hydroxide

Gupta, Nishesh Kumar; Saifuddin, Md; Kim, Suho; Kim, Kwang S.

doi:10.1016/j.molliq.2019.111935

Cited by 94 publications

(56 citation statements)

References 35 publications

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“…It could be observed that the bands were thin, proving that the exchange of Fe and Zn into the Zn-Fe LDH crystalline structure were achieved [39]. Since the peaks of (015) and (009) are higher intense than that for (003) which related to the creation of partly delaminated Zn-Fe LDH is probable this coincides with the innovative morphology through SEM images [35] (Fig. 5c).…”

Section: X-ray Diffraction Investigationsupporting

confidence: 61%

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Selective and Highly Efficient Adsorption of a Mixture of Anionic and Cationic Dyes as Synthetic Wastewater Absorbents on Layered Double Hydroxide: Experimental and Computational Studies

Mahmoud

Taha

Zaher

et al. 2021

Preprint

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Background: In the current work, the removal of cationic and anionic dyes from water was studied both experimentally and computationally. We examine the selectivity of the adsorbent, Zn–Fe layered double hydroxide (LDH) toward three cationic and anionic dyes. Methods: The chemical and physical properties of the prepared adsorbent before and after adsorption were investigated using FT-IR, X-ray diffraction, zeta potential, energy dispersive X-ray, X-ray photoelectron spectroscopy, particle size, HRTEM, and FESEM analysis; optical and electric properties were estimated. The influence of pH on the adsorption process was estimated. Monte Carlo simulations were performed to understand the adsorption mechanism and compute the adsorption energies.Significant Findings: Single dye adsorption tests revealed that Zn–Fe LDH effectively takes up anionic methyl orange (MO) more than the cationic dyes methylene blue (MB) and malachite green (MG). From MO/MB/MG mixture experiments, LDH selectively adsorbed in the following order: MO>MB>MG. The adsorption capacity of a single dye solution was 230.68, 133.29, and 57.34 mg/g for MO, MB, and MG, respectively; for the ternary solution, the adsorption capacity was 217.97, 93.122, and 49.57 mg/g for MO, MB, and MG, respectively. Zn–Fe LDH was also used as a photocatalyst, giving 92.2% and 84.7% degradation at concentrations of 10 and 20 mg/L, respectively.

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Section: X-ray Diffraction Investigationsupporting

confidence: 61%

“…5a. The infrared peaks were around 3386 cm -1 which could be ascribed to characteristic free OH-stretching of the LDH structure vibration [33] with the interlayer water molecules and hydrogen bonding [34,35] and at 1621.72 cm -1 , the band exhibited the bending vibration of the interlayer H2O water molecules.…”

Section: X-ray Diffraction Investigationmentioning

confidence: 99%

Selective and Highly Efficient Adsorption of a Mixture of Anionic and Cationic Dyes as Synthetic Wastewater Absorbents on Layered Double Hydroxide: Experimental and Computational Studies

Mahmoud

Taha

Zaher

et al. 2021

Preprint

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“…Such a synergy effect did not contradict with the antagonistic effect of P on Zn uptake as found by Watts-Williams et al (2014). In soil, inorganic phosphate (P i ) interacts with Zn forming Zn 3 (PO4) 2 (Gupta et al, 2016;Ayeni et al, 2018;Gupta et al, 2020) and/or reaction crystallization (Hutnik et al, 2016), while in plants P-fertilizer induces Zn deficiency symptoms in plants owing to the dilution effect resulted from the induction of plant growth by P fertilizers (Santos et al, 2019). The above results confirm the assumption of the study which indicates that plants fed on Zn as foliar spray increase significantly P-contents within their tissues.The efficiency of Zn-fertilizers could be arranged as follows: ZnO-NP> Zn-EDTA> ZnSO 4.…”

Section: Effect Of Zn Applications On Zn and P Availability In Soil And Their Uptake By Maize Plantsmentioning

confidence: 88%

Effect of traditional sources of Zn and ZnO-nano-particles foliar application on productivity and P-uptake of maize plants grown on sandy and clay loam soils

Noufal

Farid

Attia³

et al. 2021

EBSS

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A PPLYING Zn as soil fertilizers might undergo precipitation in presence of phosphate fertilizers; alternatively, this nutrient may be amended through foliar application. Specifically, we hypothesized that the effect of Zn foliar application is quite enough to overcome Zn deficiency beside its synergetic effect on P uptake. To test this hypothesis, a field study was conducted in a split-plot design where Zn-sources, i.e. ZnSO 4 , Zn-EDTA and ZnO-nano-particles (ZnO-NP) were plotted in main plots while their rates of application (0, 5, 10 and 15 mg L -1 ) were schemed in sub-plots. Results obtained herein indicate that these three fertilizers not only improved significantly concentrations of both P and Zn in maize during V14-fouteenth leaf and physiological maturity growth stages but also increased significantly the available contents of these nutrients in soil, especially with increasing the level of foliar application. Moreover, these fertilizers improved significantly plant height during the abovementioned growth stages and raised grain yield and 100-grain weight. The efficiency of these fertilizers could be arranged as follows: ZnO-NP> Zn-EDTA> ZnSO 4 . In conclusion, Zn foliar application especially in the nano form recorded a synergic effect on P availability and uptake; consequently these applications increased maize production as just mentioned with superiority for ZnO-NP; however, further studies are needed to investigate the residual effects of these nano-particles within the edible plant parts.

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“…The surface precipitation with metal ions can be enhanced in the LDH due to availability of OH groups and the interlayer anions [ 22 ]. LDHs are a category of isostructural (2D) lamellar materials composed of brucite-like octahedral sheets with positive charges [ 23 , 24 , 25 , 26 ]. Magnesium/ferric-based LDH (MF-LDH) can be co-precipitated from Mg and Fe salts and are indeed very efficient and environmentally friendly sorbents/ion exchangers for anions in aqueous media [ 27 , 28 , 29 , 30 ].…”

Section: Introductionmentioning

confidence: 99%

New Composite Sorbent for Removal of Sulfate Ions from Simulated and Real Groundwater in the Batch and Continuous Tests

et al. 2021

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The evaluation of groundwater quality in the Dammam formation, Faddak farm, Karbala Governorate, Iraq proved that the sulfate (SO42−) concentrations have high values; so, this water is not suitable for livestock, poultry and irrigation purposes. For reclamation of this water, manufacturing of new sorbent for permeable reactive barrier was required through precipitation of Mg and Fe hydroxides nanoparticles on the activated carbon (AC) surface with best Mg/Fe molar ratio of 7.5/2.5. Mixture of 50% coated AC and 50% scrap iron was applied to eliminate SO42− from contaminated water with efficiency of 59% and maximum capacity of adsorption equals to 9.5 mg/g for a time period of 1 h, sorbent dosage 40 g/L, and initial pH = 5 at 50 mg/L initial SO42− concentration and 200 rpm shaking speed. Characterization analyses certified that the plantation of Mg and Fe nanoparticles onto AC was achieved. Continuous tests showed that the longevity of composite sorbent is increased with thicker bed and lower influent concentration and flow rate. Computer solution (COMSOL) software was well simulated for continuous measurements. The reclamation of real contaminated groundwater was achieved in column set-up with efficiency of 70% when flow rate was 5 mL/min, bed depth was 50 cm and inlet SO42− concentration was 2301 mg/L.

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Microscopic, spectroscopic, and experimental approach towards understanding the phosphate adsorption onto Zn–Fe layered double hydroxide

Cited by 94 publications

References 35 publications

Selective and Highly Efficient Adsorption of a Mixture of Anionic and Cationic Dyes as Synthetic Wastewater Absorbents on Layered Double Hydroxide: Experimental and Computational Studies

Selective and Highly Efficient Adsorption of a Mixture of Anionic and Cationic Dyes as Synthetic Wastewater Absorbents on Layered Double Hydroxide: Experimental and Computational Studies

Effect of traditional sources of Zn and ZnO-nano-particles foliar application on productivity and P-uptake of maize plants grown on sandy and clay loam soils

New Composite Sorbent for Removal of Sulfate Ions from Simulated and Real Groundwater in the Batch and Continuous Tests

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