Magnetic MnFe2O4/ZnFe-LDH for Enhanced Phosphate and Cr (VI) Removal from Water

Huang, Congxin; Tang, Chaochun; Wu, Qingqing; Zhu, Quing

doi:10.1007/s11356-022-20049-9

Cited by 19 publications

(4 citation statements)

References 58 publications

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“…Filtration and centrifugation are the most common techniques to separate the adsorbent from the aqueous solution, which limits the scalable practices in real water. , Therefore, the magnetic separation technology has arisen broad interest, which can easily separate the adsorbents from the solution by applying the external magnetic field . To tackle this bottleneck, the combination of magnetic Fe 3 O 4 nanoparticles with LDH has been proposed to effectively remove adsorbents from the aqueous solution after the phosphate adsorption process. , Fe 3 O 4 has been considered a promising adsorbent due to its superparamagnetic properties, durability, low toxicity, low cost, high biocompatibility, chemical stability, and large surface area . Yan et al prepared ZnAl-LDH/Fe 3 O 4 composite with a core–shell structure for phosphate adsorption with easy magnetic separation …”

Section: Progress Of Ldhs In Phosphate Removal and Recyclingmentioning

confidence: 99%

“… 154 To tackle this bottleneck, the combination of magnetic Fe 3 O 4 nanoparticles with LDH has been proposed to effectively remove adsorbents from the aqueous solution after the phosphate adsorption process. 40 , 155 Fe 3 O 4 has been considered a promising adsorbent due to its superparamagnetic properties, durability, low toxicity, low cost, high biocompatibility, chemical stability, and large surface area. 156 Yan et al prepared ZnAl-LDH/Fe 3 O 4 composite with a core–shell structure for phosphate adsorption with easy magnetic separation.…”

Section: Progress Of Ldhs In Phosphate Removal and Recyclingmentioning

confidence: 99%

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Layered Double Hydroxides for Regulating Phosphate in Water to Achieve Long-Term Nutritional Management

et al. 2023

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Hunger and undernourishment are increasing global challenges as the world’s population continuously grows. Consequently, boosting productivity must be implemented to reach the global population’s food demand and avoid deforestation. The current promising agricultural practice without herbicides and pesticides is fertilizer management, particularly that of phosphorus fertilizers. Layered double hydroxides (LDHs) have recently emerged as favorable materials in phosphate removal, with practical application possibilities in nanofertilizers. This review discusses the fundamental aspects of phosphate removal/recycling mechanisms and highlights the current endeavors on the development of phosphate-selective sorbents using LDH-based materials. Specific emphasis is provided on the progress in designing LDHs as the slow release of phosphate fertilizers reveals their relevance in making agro-practices more ecologically sound. Relevant pioneering efforts have been briefly reviewed, along with a discussion of perspectives on the potential of LDHs as green nanomaterials to improve food productivity with low eco-impacts.

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Section: Progress Of Ldhs In Phosphate Removal and Recyclingmentioning

confidence: 99%

Section: Progress Of Ldhs In Phosphate Removal and Recyclingmentioning

confidence: 99%

Layered Double Hydroxides for Regulating Phosphate in Water to Achieve Long-Term Nutritional Management

et al. 2023

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“…In the past decades, varieties of materials had been developed for removal of P from water; − these materials primarily increase the adsorption of P in water through electrostatic attraction, ligand exchange, and precipitation mechanisms. Yang et al utilized the MOF template method to create Fe–Ce bimetal oxide composites, which successfully reduced phosphorus concentration to less than 0.32 mg/L within 4 h. Huang et al achieved 90% phosphate removal in just 20 min by preparing a needle-shaped ZIF.…”

Section: Introductionmentioning

confidence: 99%

“…that possess a relatively high solubility product constant (p K sp ) of the metal phosphate as the cations for the preparation of LDH. Therefore, LDH usually exhibits good capacity on adsorption of phosphate ions. ,− In addition, it is also able to make phosphate ions successfully desorb from LDH by soaking it in basic solutions . Consequently, it is theoretically possible to apply LDH for the recovery of P. However, LDH is commonly apt to be tightly stacked, so some as-designed adsorption sites actually fail to absorb phosphate ions in this case .…”

Section: Introductionmentioning

confidence: 99%

Tremella-like Zn–Al–Zr-Layered Double-Hydroxide/Graphene Oxide Nanocomposites for Enhanced Phosphorus Recovery

Ren,

Huang,

et al. 2024

ACS Appl. Nano Mater.

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By virtue of the hydroxyl and carboxyl groups on the graphene oxide (GO) plane, three-dimensional tremella-like Zn–Al–Zr-layered double-hydroxide/GO (Zn–Al–Zr LDH/GO) nanocomposites have been successfully prepared via the self-assembly process. As compared to Zn–Al–Zr LDH, the Zn–Al–Zr LDH/GO nanocomposite (LDH/GO-4) possesses a hierarchical pore structure; it shows an enlarged pore width which endows it with enhanced phosphorus (P) adsorption capacity, and the fitting of nonlinear Langmuir showed that the maximum adsorption capacity reaches 36.86 ± 0.76 mg-P/g. The fitting of the kinetic model confirmed that the adsorption process was predominantly chemisorption. Meanwhile, fitting of the thermodynamic model indicated that the adsorption process was endothermic, stochastic, and spontaneous. For LDH/GO-4, the [−C–O–Zn(OH) x ] and [−COO–ZrO(OH) x ] groups are its chief active sites to chemically absorb P. In this study, LDH/GO-4 can make the total phosphorus (TP) concentration of the real river water decline from 0.28 mg/L to near zero in 24 h, while the Phoslock commercial product only achieves a TP removal rate of 46.43% under the same conditions. Moreover, LDH/GO-4 also has good reusability in a steady recovery of P, and the removal rate of TP was still over 95% after it experienced the adsorption–desorption of P for five cycles. Thus, LDH/GO-4 shows great potential for application in the sustainable P recovery field.

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Layered Double Hydroxide: An Economical and Dynamic Choice for Water Remediation with Multiple Functionality

Gupta,

Singh,

Koranne

et al. 2024

ChemistrySelect

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In terms of environmental pollution, water pollution is the most significant problem facing living organisms worldwide. Pollutants of various types, including toxic, inorganic, and organic materials, have a detrimental impact on terrestrial and aquatic ecosystems. Materials with layers, such as layered double hydroxides (LDHs), a type of synthetic anion clay, have a wide range of potential applications. In this comprehensive study, we have discussed variety of LDHs, and their explicit properties which have significant advantages for the removal of a variety of pollutants from water. Besides these, LDHs are easily synthesized with high yield and, tuneable structure based on choice of metals, etc. Based on these unique potentials, we have summarized how layered double hydroxides and their hybrids are synthesized efficiently. The performance and applications in removing water pollutants involving heavy metals, inorganic anions, and organics at different parameters such as temperature, adsorbent dosage, pH, and contact time are discussed. Consolidated information has been provided regarding the LDH synthesis, conditions for adsorption, and reference of the particular work. The worked‐up LDH's regeneration potential and methods evolved for regenerating it, different kinetic models and isotherms are also discussed.

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Magnetic MnFe2O4/ZnFe-LDH for Enhanced Phosphate and Cr (VI) Removal from Water

Cited by 19 publications

References 58 publications

Layered Double Hydroxides for Regulating Phosphate in Water to Achieve Long-Term Nutritional Management

Layered Double Hydroxides for Regulating Phosphate in Water to Achieve Long-Term Nutritional Management

Tremella-like Zn–Al–Zr-Layered Double-Hydroxide/Graphene Oxide Nanocomposites for Enhanced Phosphorus Recovery

Layered Double Hydroxide: An Economical and Dynamic Choice for Water Remediation with Multiple Functionality

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