Magnetic materials and magnetic separation of dyes from aqueous solutions: a review

Nithya, R.; Thirunavukkarasu, Arunachalam; Sathya, Arunachalam Bose; Sivashankar, R.

doi:10.1007/s10311-020-01149-9

Cited by 85 publications

(29 citation statements)

References 97 publications

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“…Pollutants removal from the aquatic media is being evaluated over the past several years through an adsorption process employing either organic or inorganic materials. These materials are activated carbon, clay, chitosan, zeolite, metal oxide, and ionexchange resins [93,144,97,54,74,14,43,109,105,20,55]. Among these materials, ion-exchange resins are the most special ones because they possess a strong binding affinity with water pollutants [26].…”

Section: I C Imentioning

confidence: 99%

Supramolecular Ion-Exchange Resins Based on Calixarene Derivatives for Pollutant Removal from Aquatic Environmental Samples

Jumina

Kurniawan

2021

Inorganic-Organic Composites for Water and Wastewater Treatment

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Water pollutants, i.e., heavy metal ions, pesticides, dyes, and pigments, are contaminating our aquatic environment and generating serious health damage for the human body. Adsorption using ion-exchange resin materials is one of the versatile techniques for water treatment due to its simple and low-cost process. However, when the separation and pre-concentration of the water pollutants only rely on the ion-exchange mechanism, selective removal of water pollutants cannot be easily achieved. In contrast, a supramolecular organic compound named calixarene offers a promising technology for selective ion and molecular discrimination due to strict host-guest interactions. We reviewed the up-to-date research of supramolecular ionexchange resins based on calixarene derivatives for pollutant removal from aquatic environmental samples. There are three techniques to prepare the supramolecular ion-exchange resins based on calixarene derivatives: (1) impregnation of calixarene on the commercially available resins, (2) polymerization of calixarene, and (3) crosslink-reaction of the calixarene derivatives. The description, advantages, and disadvantages of each technique are discussed. By using these techniques, hundreds of ion-exchange resin materials have been successfully prepared and they showed a remarkable capability and selectivity for heavy metal ions, pesticides, dyes, and pigments removal.

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Section: I C Imentioning

confidence: 99%

Supramolecular Ion-Exchange Resins Based on Calixarene Derivatives for Pollutant Removal from Aquatic Environmental Samples

Jumina

Kurniawan

2021

Inorganic-Organic Composites for Water and Wastewater Treatment

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“…Magnetic NP adsorbents are efficacious in the treatment of both drinking water and wastewater due to their low cost, simplicity of use, small size, high surface-to-volume ratio, and environmental friendliness [31]. The use of such nanomaterials, combined with nanotechnology and magnetic separation methods, may result in an effective water pollution remediation technology [32].…”

Section: Introductionmentioning

confidence: 99%

Iron Oxide (Fe3O4)-Supported SiO2 Magnetic Nanocomposites for Efficient Adsorption of Fluoride from Drinking Water: Synthesis, Characterization, and Adsorption Isotherm Analysis

Sarwar

Wang

Khan

et al. 2021

Water

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This research work reports the magnetic adsorption of fluoride from drinking water through silica-coated Fe3O4 nanoparticles. Chemical precipitation and wet impregnation methods were employed to synthesize the magnetic nanomaterials. Moreover, the synthesized nanomaterials were characterized for physicochemical properties through scanning electron microscopy, Fourier-transform infrared spectroscopy, and X-ray powder diffraction. Screening studies were conducted to select the best iron oxide loading (0.0–1.5 wt%) and calcination temperature (300–500 °C). The best selected nanomaterial (0.5Fe-Si-500) showed a homogenous FeO distribution with a 23.79 nm crystallite size. Moreover, the optimized reaction parameters were: 10 min of contact time, 0.03 g L−1 adsorbent dose, and 10 mg L−1 fluoride (F−) concentration. Adsorption data were fitted to the Langmuir and Freundlich isotherm models. The Qm and KF (the maximum adsorption capacities) values were 5.5991 mg g−1 and 1.869 L g−1 respectively. Furthermore, accelerated adsorption with shorter contact times and high adsorption capacity at working pH was among the outcomes of this research work.

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“…These nanomaterials can also have multiple active sorption sites and tuneable porosity (El-sayed 2020 ). One specific class of nanoadsorbents is magnetic nanoadsorbents (Mahamadi 2019 ; Franzreb 2020 ; Vicente-Martínez et al 2020 ; He et al 2021 ; Jiang et al 2021 ; Peralta et al 2021 ; Mohammadi et al 2021 ; Nithya et al 2021 ; Álvarez-Manzaneda et al 2021 ; Plohl et al 2021 ). According to a recent review, research on the preparation and use of magnetic adsorbents has been progressing fast, and has yielded more than eightfold rise in the number of publications in the period from 2010 to 2020 (Reshadi et al 2020 ).…”

Section: Introductionmentioning

confidence: 99%

Magnetic nanoadsorbents for micropollutant removal in real water treatment: a review

Mudhoo

Sillanpää

2021

Environ Chem Lett

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Pure water will become a golden resource in the context of the rising pollution, climate change and the recycling economy, calling for advanced purification methods such as the use of nanostructured adsorbents. However, coming up with an ideal nanoadsorbent for micropollutant removal is a real challenge because nanoadsorbents, which demonstrate very good performances at laboratory scale, do not necessarily have suitable properties in in full-scale water purification and wastewater treatment systems. Here, magnetic nanoadsorbents appear promising because they can be easily separated from the slurry phase into a denser sludge phase by applying a magnetic field. Yet, there are only few examples of large-scale use of magnetic adsorbents for water purification and wastewater treatment. Here, we review magnetic nanoadsorbents for the removal of micropollutants, and we explain the integration of magnetic separation in the existing treatment plants. We found that the use of magnetic nanoadsorbents is an effective option in water treatment, but lacks maturity in full-scale water treatment facilities. The concentrations of magnetic nanoadsorbents in final effluents can be controlled by using magnetic separation, thus minimizing the ecotoxicicological impact. Academia and the water industry should better collaborate to integrate magnetic separation in full-scale water purification and wastewater treatment plants.

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Magnetic materials and magnetic separation of dyes from aqueous solutions: a review

Cited by 85 publications

References 97 publications

Supramolecular Ion-Exchange Resins Based on Calixarene Derivatives for Pollutant Removal from Aquatic Environmental Samples

Supramolecular Ion-Exchange Resins Based on Calixarene Derivatives for Pollutant Removal from Aquatic Environmental Samples

Iron Oxide (Fe3O4)-Supported SiO2 Magnetic Nanocomposites for Efficient Adsorption of Fluoride from Drinking Water: Synthesis, Characterization, and Adsorption Isotherm Analysis

Magnetic nanoadsorbents for micropollutant removal in real water treatment: a review

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