A new nano-sorbent for fast and efficient removal of heavy metals from aqueous solutions based on modification of magnetic mesoporous silica nanospheres

Vojoudi, Hossein; Badiei, Alireza; Bahar, Shahriyar; Ziarani, Ghodsi Mohammadi; Faridbod, Farnoush; Ganjali, Mohammad Reza

doi:10.1016/j.jmmm.2017.05.065

Cited by 115 publications

(29 citation statements)

References 53 publications

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“…In general, the composites prepared with the resin Dowex 50 WX4 were the most efficient in the removal of Ni(II), Cu(II), Cd(II) and Pb(II), showing an adsorption capacity of 384, 416, 398 and 380 mg/g, respectively [45]. These values are higher than the data registered for other composites obtained from carbon nanotubes [34], α-cellulose [40], chitosan [41][42][43], silica [53], starch [54] and different types of biomass such as waste orange peel, pine bark and Cyclosorus interruptus (see Table 3) [33,50,55]. Additionally, it is relevant to mention that for the removal of Cr(VI), the composite obtained with poly(vinylidene fluoride) shows the higher adsorption capacity (1423.4 mg/g) in comparison with the samples prepared from chitosan (46 mg/g), cotton (3.74 mg/g) and Dowex 50 WX4 resin (400 mg/g) [41,44,45].…”

Section: Magnetic Adsorbentsmentioning

confidence: 99%

Removal of Heavy Metals Using Adsorption Processes Subject to an External Magnetic Field

Virgen¹,

Vázquez²,

Montoya³

et al. 2018

Heavy Metals

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Adsorption is a broadly used process for the removal of heavy metals and the world trend is directed to the application of new technologies to intensify existing processes. The properties of the magnetic field (intensity and arrangement) and the intrinsic magnetic properties of the adsorbent and the adsorbate are decisive for satisfactory results. The intensity of the magnetic field is important, because this implies that the greater number of spins present will align with the magnetic field according to the magnetic nature present, allowing the mobility of the adsorbate and generating heterogeneity on the surface of the adsorbent. Similarly, the arrangement of the magnetic field will determine the direction of the magnetic field lines. The application of a magnetic field as an alternative for the intensification of the adsorption process based on the consideration that the magnetic field is safe, environmentally friendly and economic.

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Section: Magnetic Adsorbentsmentioning

confidence: 99%

Removal of Heavy Metals Using Adsorption Processes Subject to an External Magnetic Field

Virgen¹,

Vázquez²,

Montoya³

et al. 2018

Heavy Metals

View full text Add to dashboard Cite

show abstract

“…Zhao's group also prepared a simple core-shell Mag-MSN method, [157] which contains a covalently bonded cyclodextrin for the removal of the antibiotic doxycycline in water. Based on the modification of magnetic mesoporous silica nanospheres, Vojoudi et al [158] prepared a new kind of nano-adsorbent, which can remove Hg(II), Pd(II) and Pb(II) heavy metals in aqueous solution quickly and efficiently. Using tetrabromobisphenols (TBBPS) as the template, Wang prepared another novel magnetic mesoporous molecularly imprinted polymer (MMIPs) with the core-shell structure for selective adsorption of t TBBPS by simple surface molecular imprinting polymerization.…”

Section: Applications For Wastewater Treatmentmentioning

confidence: 99%

Recent Advances in the Synthesis, Surface Modifications and Applications of Core‐Shell Magnetic Mesoporous Silica Nanospheres

Zuo

et al. 2020

Chemistry An Asian Journal

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The hierarchically structured core-shell magnetic mesoporous silica nanospheres (Mag-MSNs) have attracted extensive attention, particularly in studies involving reliable preparations and diverse applications of the multifunctional nanomaterials in multi-disciplinary fields. Intriguingly, Mag-MSNs have been prepared with well-designed synthesis strategies and used as adsorbent materials, biomedicines, and in proteomics and catalysis due to their excellent magnetic responsiveness, enormous specific surface area and readiness for surface modifications. Through a carefully designed surface modification of Mag-MSNs, the performance and application prospects of the material are greatly improved. Typically, the introduction of various molecular matrices into the shell of Mag-MSNs facilitates the combination of surface modifications and magnetic separation technology. So far, as sustainable chemistry is concerned, it is important to recover the functionalized core-shell Mag-MSNs after the reaction and reuse them without losing activity. In this review, the design conceptions and the construction of core-shell Mag-MSNs are discussed. Furthermore, various surface modification approaches of core-shell Mag-MSNs are summarized, and recent applications of these functionalized nanomaterials in the fields of biomedicine, catalysis, proteomics and wastewater treatment are exemplified. 2 3 4 5 6 7 8

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“…Mesoporous silica materials (MSMs) derived from MCM41 type was investigatd in the removal of Cu(II), Cd(II) and Pb (II) with adsorption capacities around 36.3,32.3 and 58.5 mg/g in the pH range 5-7 (Zhu et al, 2017). Vojoudi et al (2017) evaluated the efficiency of magnetic mesoporous silica as nanoadsorbent for the removal of Pb(II) and Hg(II) ions in batch study leading to 303.03 and 256.41 mg/g adsorption capacities respectively.…”

Section: Agricultural Solid Wastes As Adsorbents/ Nonconventional Grementioning

confidence: 99%

Remediation of heavy metals using non-conventional adsorbents and biosurfactant-producing bacteria

Rastogi¹,

Kumar²

2020

Environmental Degradation: Causes and Remediation Strategies

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Heavy metal pollution in the ecosystem has attracted worldwide attention due to the persistent non-biodegradable toxic nature that affects not only human beings but also animals and vegetation. Instead of using available conventional techniques, the focus has been shifted to utilize eco-friendly, cost-effective, integrated remediation approaches that are simple, non-conventional with design flexibility and does not harm the prevailing surroundings. The main approaches utilized for remediation of heavy metal contaminated soils are sand capping or land filling, phytoremediation, bioremediation, washing, electro-chemical remediation, stabilization, soil replacement, phytoextraction, phytovoltalization, etc., but again they have their own merits and demerits. Many treatment technologies are employed at industrial scale for HM removal from wastewater effluents such as chemical precipitation, flocculation, coagulation, solvent extraction, adsorption, complexation, electro-kinetics, membrane filtration, etc. Therefore, the present chapter critically highlights the role of non-conventional adsorbents and bacterial surfactants as the best alternative technique for heavy metal remediation from contaminated soil and water systems.

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A new nano-sorbent for fast and efficient removal of heavy metals from aqueous solutions based on modification of magnetic mesoporous silica nanospheres

Cited by 115 publications

References 53 publications

Removal of Heavy Metals Using Adsorption Processes Subject to an External Magnetic Field

Removal of Heavy Metals Using Adsorption Processes Subject to an External Magnetic Field

Recent Advances in the Synthesis, Surface Modifications and Applications of Core‐Shell Magnetic Mesoporous Silica Nanospheres

Remediation of heavy metals using non-conventional adsorbents and biosurfactant-producing bacteria

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