Nano modification of NZVI with an aquatic plant Azolla filiculoides to remove Pb(II) and Hg(II) from water: Aging time and mechanism study

Arshadi, M.; Abdolmaleki, Mahmood Karimi; Mousavinia, F.; Foroughifard, S.; Karimzadeh, Ayatollah

doi:10.1016/j.jcis.2016.10.002

Cited by 76 publications

(10 citation statements)

References 42 publications

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“…As a means of overcoming these disadvantages, the idea of immobilizing the ZVFe NPs into porous host materials was proposed and discussed in several research studies. Three main categories of porous host materials are available for the stabilization of iron NPs: (i) natural minerals, namely pillared clay [18], pumice granular [19,20], acid activated sepiolites [21,22], montmorillonite [23,24], kaolin [25], bentonite [26,27], zeolite [28][29][30], biochar [31,32], and charcoal [33]; (ii) biomaterials such as pine cone [34], aquatic plant Azolla filiculoides [35], cellulose nanofibrils [36], walnut shell [37], and macroporous alginate ( [38,39]); and (iii) synthetic materials such as cationic resin [40], anion exchange resin [41], porous carbon sheet [42], chelating resin [43], titanate nanotube [44], meso-porous silica carbon [45], layered double hydroxide [46,47], activated carbon [34,48,49], graphene oxide [45,50], chitosan [51], carbon nanotube [52], magnesium (hydr)oxide [19,53], and humic acid [54].…”

Section: Introductionmentioning

confidence: 99%

Pb(II) Removal from Aqueous Solutions by Adsorption on Stabilized Zero-Valent Iron Nanoparticles—A Green Approach

Sepehri

Kanani

Abdoli

et al. 2023

Water

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Nano zero-valent iron particles (nZVFe) are known as one of the most effective materials for the treatment of contaminated water. However, a strong tendency to agglomerate has been reported as one of their major drawbacks. The present study describes a green approach to synthesizing stabilized nZVFe, using biomass as a porous support material. Therefore, in the first step, biomass-derived activated carbon was prepared by thermochemical procedure from rice straw (RSAC), and then the RSAC-supported nZVFe composite (nZVFe–RSAC) was employed to extract Pb(II) from aqueous solution and was successfully synthesized by the sodium borohydride reduction method. It was confirmed through scanning electron microscopy (SEM) and X-ray diffraction (XRD) characteristics that the nZVFe particles are uniformly dispersed. Results of the batch experiments showed that 6 (g L−1) of this nanocomposite could effectively remove about 97% of Pb(II) ions at pH = 6 from aqueous solution. The maximum adsorption capacities of the RS, RSAC, and nZVFe–RSAC were 23.3, 67.8, and 140.8 (mg g−1), respectively. Based on the results of the adsorption isotherm studies, the adsorption of Pb(II) on nZVFe–RSAC is consistent with the Langmuir–Freundlich isotherm model R2=0.996). The thermodynamic outcomes exhibited the endothermic, possible, and spontaneous nature of adsorption. Adsorption enthalpy and entropy values were determined as 32.2 kJ mol−1 and 216.9 J mol−1 K−1, respectively. Adsorption kinetics data showed that Pb(II) adsorption onto nZVFe–RSAC was fitted well according to a pseudo-second-order model. Most importantly, the investigation of the adsorption mechanism showed that nZVFe particles are involved in the removal of Pb(II) ions through two main processes, namely Pb adsorption on the surface of nZVFe particles and direct role in the redox reaction. Subsequently, all intermediates produced through the redox reaction between nZVFe and Pb(II) were adsorbed on the nZVFe–RSAC surface. According to the results of the NZVFe–RSAC recyclability experiments, even after five cycles of recovery, this nanocomposite can retain more than 60% of its initial removal efficiency. So, the nZVFe–RSAC nanocomposite could be a promising material for permeable reactive barriers given its potential for removing Pb(II) ions. Due to low-cost and wide availability of iron salts as well as rice biowaste, combined with the high adsorption capacity, make nZVFe–RSAC an appropriate choice for use in the field of Pb(II) removal from contaminated water.

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Section: Introductionmentioning

confidence: 99%

Pb(II) Removal from Aqueous Solutions by Adsorption on Stabilized Zero-Valent Iron Nanoparticles—A Green Approach

Sepehri

Kanani

Abdoli

et al. 2023

Water

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“…Fitting the experimental data reveals an extremely high correlation coefficient (∼1; the inset in Figure ), verifying that the model can adequately describe the kinetic data of mercury sorption. This result further implies that chemical adsorption is the determining step of the adsorption processes and its major uptake mechanism. , …”

Section: Resultsmentioning

confidence: 88%

Fast and Effective Decontamination of Aqueous Mercury by a Highly Stable Zeolitic-like Chalcogenide

Zhang

Wang

et al. 2019

Inorg. Chem.

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Highly efficient and effective removal of mercury from water, especially at very low ionic concentration, remains a grand challenge for ecosystem protection and human health. Herein, we present the synthesis, crystal structure, and mercury uptake performance of a new heterometallic chalcogenidometalate, namely, [TAEAH]-[TAEAH 2 ] 0.6 Ga 2.2 Sn 1.8 S 8 •H 2 O (GaSnS-1; TAEA = Tris(2-aminoethyl)amine). GaSnS-1 features a three-dimensional (3D) zeolite-typed (RWY) framework structure of [Ga 2.2 Sn 1.8 S 8 ] n 2.2n− that is constructed by corner-sharing of supertetrahedral [Ga 2.2 Sn 1.8 S 10 ] 6.2− T2 clusters. The equilibrium model study indicated that the maximum Hg 2+ saturation capacity of GaSnS-1 was 213.9 mg/g. GaSnS-1 possessed extremely rapid adsorption kinetics following the pseudo-second-order model with a k 2 of 5.65 × 10 2 g• mg −1 •min −1 . Particularly, GaSnS-1 exhibited excellent selectivity for Hg 2+ ions with a high distribution coefficient K d value of 1.62 × 10 7 mL/g and high removal efficiency of close to 100%. The superior Hg 2+ ion adsorption performance was also impressive despite the presence of excessive competing cations and the acidic/basic conditions. Furthermore, a simple chromatographic column loaded with GaSnS-1 microcrystals is capable of rapidly and effectively capturing Hg 2+ ions far below the upper limit (2 ppb, USA-EPA) of drinking water. These advantages of GaSnS-1 make it a promising candidate for the fast and efficient remediation of Hg 2+ -contaminated water sources.

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“…22 In fact, by washing the pristine grape seed with a basic solution (0.1 M NaOH) most of the impurities such as dyes and physically adsorbed materials are cleaned, as the obtained waste solution turned to dark after washing steps, which confirmed the impurities are detached and eventually NBF-like structure with high chemical and mechanical stability appeared. 23 The SEM and TEM images (Figure 1b,c) obviously display that nanosized Fe 3 O 4 particles are well coated onto the NBF, featuring a mean diameter of ∼50 nm.…”

Section: ■ Results and Discussionmentioning

confidence: 94%

High-Throughput, Green, Low-Cost, and Efficient Recovery of Heparin from a Biological Mixture Using Bio-Originated Magnetic Nanofibers

Eskandarloo

Arshadi

Azizi

et al. 2019

ACS Sustainable Chem. Eng.

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Heparin is an anticoagulant commercially derived from porcine intestinal mucosa that is challenging to selectively isolate for further purification. In this study, we propose the fabrication of amine-functionalized magnetic nanobiofibers (NBF@Fe-NH2), 1–2 μm long and 50–200 nm wide with mostly tube-shaped structures, originating from grape seeds as green and efficient bioadsorbents for the efficient recovery of heparin. To rapidly screen for heparin adsorption, we used a novel high-throughput technique based on UV–vis spectroscopy and 96-well microplates. The heparin uptake performance of the fabricated adsorbents vs Amberlite FPA98 Cl, a conventional absorbent utilized in industry for heparin recovery, was examined in a mixture containing heparin isolated from porcine intestinal mucosa. The NBF@Fe-NH2 showed a higher heparin uptake perf compared to the Amberlite FPA98 Cl. Furthermore, we also performed a sheep plasma clotting assay and found that the heparin sample separated by NBF@Fe-NH2 featured a higher anticoagulant potency than that recovered by Amberlite FPA98 Cl. We examined the mechanism of heparin capture by the NBF@Fe-NH2 using XPS and ζ-potential methods to confirm the potent electrostatic interaction of the amine-functional coatings of the nanofibers with the sulfate groups of heparin. The successful regeneration of the NBF@Fe-NH2 through the assistance of NaCl and the complete separation of the NBF@Fe-NH2 from solution by applying an external magnetic field were also demonstrated in this study. A successful breakthrough test was performed for the heparin separation by the NBF@Fe-NH2 in a continuous recovery system, in which 79.18% of heparin (1000 mg L–1) was adsorbed within 35 min of continuous flow. We also studied the equilibrium heparin adsorption results using different isotherm and kinetic models and simulated these results using an artificial neural network technique, which is a suitable technique for the prediction of the experimental data.

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Nano modification of NZVI with an aquatic plant Azolla filiculoides to remove Pb(II) and Hg(II) from water: Aging time and mechanism study

Cited by 76 publications

References 42 publications

Pb(II) Removal from Aqueous Solutions by Adsorption on Stabilized Zero-Valent Iron Nanoparticles—A Green Approach

Pb(II) Removal from Aqueous Solutions by Adsorption on Stabilized Zero-Valent Iron Nanoparticles—A Green Approach

Fast and Effective Decontamination of Aqueous Mercury by a Highly Stable Zeolitic-like Chalcogenide

High-Throughput, Green, Low-Cost, and Efficient Recovery of Heparin from a Biological Mixture Using Bio-Originated Magnetic Nanofibers

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