Phosphorus recovery through adsorption by layered double hydroxide nano-composites and transfer into a struvite-like fertilizer

Yan, Hao-Jie; Chen, Qiuwen; Liu, Jinhua; Feng, Yang; Shih, Kaimin

doi:10.1016/j.watres.2018.09.005

Cited by 104 publications

(32 citation statements)

References 51 publications

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“…The symbol x describing the metal ratio (x = N 3+ /(N 2+ + N 3+ )) is mainly in the range of 0.2-0.33 [19]. The stunning affinity to phosphate due to the weak interlayer bonding makes LDHs a promising adsorbent in wastewater purification [20][21][22]. Researchers have proved that ZnFe(III)-based oxides/hydroxides own tremendous capacity for oxyanions scavenge [23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Simultaneous adsorption study of ammonium and phosphate by ZnFe-layered double hydroxide (ZnFe-LDH)-modified adsorbents.

Liu¹,

Liang²,

Li³

et al. 2020

Preprint

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Background Trace amounts of nitrogen and phosphorus can easily trigger eutrophication damage in surface water, while cost-effective adsorption treatment is in prospect for clearing these pollutants simultaneously and efficiently. In this study, engineered adsorbents decorated with ZnFe-LDH by alkaline coprecipitation (3-6 mm, with modified ceramsite as CZF and modified volcanic rock as VZF) were prepared for NH 4 + and H 2 PO 4 - co-adsorption from aqueous solutions.Results Coexisting ions showed great effects on phosphate adsorption, especially Ca 2+ and CO 3 2- , and humic acid exhibited only a limited shielding impact on co-adsorption properties. Though comprehensive tests presented that the maximum captured amount of ammonium and phosphate occurred at pH 7, the isotherm and kinetic results suggest that two adsorbents preferentially adsorbed each pollutant. Specifically, the maximum uptake quantity of NH 4 + (15.55 mg-N g -1 ) and H 2 PO 4 - (11.21 mg-P g -1 ) were achieved by VZF and CZF, respectively, and controlled by physisorption and chemisorption distinctively, revealing that contaminants were cleared in disparate ways. Performances of seven consecutive adsorption/desorption cycles using 5% NaOH regenerant suggested that CZF retained 71.9% of PO 4 - removal efficiency, and VZF retained 47.9% of the NH 4 + adsorption rate, implying the strong reusability of ZnFe-LDH-modified adsorbents. A dynamic study has assessed that with 1 kg of combined modified adsorbents, approximately 527 L of polluted runoff flow could be continuously treated to below the National limits within one adsorption cycle.Conclusion Comparing with other parallel adsorbents, ZnFe-LDH-modified adsorbent is promising in eliminating eutrophication due to their superior capacity, stability, renewability, and non-toxicity.

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Section: Introductionmentioning

confidence: 99%

Simultaneous adsorption study of ammonium and phosphate by ZnFe-layered double hydroxide (ZnFe-LDH)-modified adsorbents.

Liu¹,

Liang²,

Li³

et al. 2020

Preprint

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“…The agriculture process all around the world suffers from poor efficiency of current fertilizers. Traditional fertilizers, owing to their low thermal stability, high solubility and small molecular weight, tend to migrate into the air and water through volatilization, runoff and leaching; causing severe environmental pollution such as acid rain, eutrophication and worsening global warming [1]. Nowadays, nanotechnology started to be used in the plant nutrition production aiming to improve the efficiency of current fertilizers, either by improving the fertilizers bioavailability or by limiting losses of such nutrients to the surrounding environment [2].…”

Section: Introductionmentioning

confidence: 99%

Green synthesis of manganese zinc ferrite nanoparticles and their application as nanofertilizers for Cucurbita pepo L.

Shebl¹,

Hassan²,

Salama³

et al. 2019

Preprint

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This study aims to synthesize manganese zinc ferrite nanoparticles (Mn0.5Zn0.5Fe2O4 NPs) using a green chemistry synthesis technique and investigate their efficiency as nanofertilizers for squash plant (Cucurbita pepo L). In this work, Mn0.5Zn0.5Fe2O4 NPs were successfully prepared at different temperatures via simple template-free microwave-assisted hydrothermal route and used as foliar nanofertilizers for squash plant. The physicochemical characteristics of the as-prepared ferrites were investigated using X-ray diffraction (XRD), N2 adsorption-desorption isotherm, field emission scanning electron microscopy (FE-SEM) and high resolution transmission electron microscopy (HR-TEM) techniques. The prepared nanoferrites showed type IV adsorption isotherm characteristic for mesoporous materials. FE-SEM and HR-TEM imaging proves the production cubic shaped nanoparticles with average particle size 10-12 nm. Also the impact of using different concentrations of Mn0.5Zn0.5Fe2O4 NPs on vegetative growth, minerals content and the yield of squash plant were investigated. The result showed that the highest vegetative growth for squash appeared with plants supplied by Mn0.5Zn0.5Fe2O4 NPs synthesized at 180°C. On the contrary, the yield of squash recorded the best with 160°C. As for the use of different concentrations of Mn0.5Zn0.5Fe2O4 NPs, it was found that the use of the lowest concentrations gave the highest values of vegetative growth and yield characters. The chemical content of the squash plant differs from the components of proximate value and the elements according to the temperature used in the composition of the compound Mn0.5Zn0.5Fe2O4 NPs and its concentrations. Accordingly, these nanoferrites can be considered as good candidates for Cucurbita pepo L fertilization.

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“…A potential future example of such smart bio-material, would be novel layered double hydroxides (LDH) for recovering phosphorous-based derivatives (from fresh waters areas i.e. affected by Eutrophication) and then used for FR applications (in new ecofriendly biodegradable materials) [122]. This potential FR class of modified LDH in polymer materials, when entering the end-of-life stage, can offer controlled release in soil to re-establish the environmental equilibrium [123].…”

Section: Discussionmentioning

confidence: 99%

Halogen-free flame retardants for application in thermoplastics based on condensation polymers

et al. 2019

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Future materials in the field of thermoplastics require a lower impact on the environment. Actual thermoplastic materials also require "greener" additives for thermal and fire resistance profile. In this work, some of the recent solutions for halogen-free flame retardants were discussed in the context of viable routes with economical and industrial relevance. The fire retardant mechanism was discussed in order to imagine new solutions for future additives. Some of the main (inorganic, organic or hybrid) flame retardants can be used as common platform for the next classes of thermoplastic composites (synthetic, natural, or bio-based). The new generation of flame retardants (based on the emerging solutions) will have to surpass two major barriers: the cost effectiveness and the need for high concentration (which usually affects other properties).

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Phosphorus recovery through adsorption by layered double hydroxide nano-composites and transfer into a struvite-like fertilizer

Cited by 104 publications

References 51 publications

Simultaneous adsorption study of ammonium and phosphate by ZnFe-layered double hydroxide (ZnFe-LDH)-modified adsorbents.

Simultaneous adsorption study of ammonium and phosphate by ZnFe-layered double hydroxide (ZnFe-LDH)-modified adsorbents.

Green synthesis of manganese zinc ferrite nanoparticles and their application as nanofertilizers for Cucurbita pepo L.

Halogen-free flame retardants for application in thermoplastics based on condensation polymers

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