Nanoadsorbents for Environmental Remediation

Khan, Adnan; Malik, Sumeet; Shah, Sumaira; Ali, Nisar; Ali, Farman; Ghotekar, Suresh; Dabhane, Harshal; Bilal, Muhammad

doi:10.1002/9783527834143.ch7

Cited by 7 publications

(2 citation statements)

References 74 publications

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“…In recent decades, nanoscale materials have taken an increasingly important place, not only in engineering and technology but also in such areas of human activity as environmental protection or medical applications. Now, it is already impossible to solve, for example, the problems of water purification from a wide variety of pollutants without the use of nanoscale materials [1][2][3]. The adsorption of pollutants by the surface of nanoparticles is one of the main methods for purifying liquid substances, including water.…”

Section: Introductionmentioning

confidence: 99%

Core–Shell Fe3O4@C Nanoparticles for the Organic Dye Adsorption and Targeted Magneto-Mechanical Destruction of Ehrlich Ascites Carcinoma Cells

et al. 2022

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The morphology, structure, and magnetic properties of Fe3O4 and Fe3O4@C nanoparticles, as well their effectiveness for organic dye adsorption and targeted destruction of carcinoma cells, were studied. The nanoparticles exhibited a high magnetic saturation value (79.4 and 63.8 emu/g, correspondingly) to facilitate magnetic separation. It has been shown that surface properties play a key role in the adsorption process. Both types of organic dyes—cationic (Rhodomine C) and anionic (Congo Red and Eosine)—were well adsorbed by the Fe3O4 nanoparticles’ surface, and the adsorption process was described by the polymolecular adsorption model with a maximum adsorption capacity of 58, 22, and 14 mg/g for Congo Red, Eosine, and Rhodomine C, correspondingly. In this case, the kinetic data were described well by the pseudo-first-order model. Carbon-coated particles selectively adsorbed only cationic dyes, and the adsorption process for Methylene Blue was described by the Freundlich model, with a maximum adsorption capacity of 14 mg/g. For the case of Rhodomine C, the adsorption isotherm has a polymolecular character with a maximum adsorption capacity of 34 mg/g. To realize the targeted destruction of the carcinoma cells, the Fe3O4@C nanoparticles were functionalized with aptamers, and an experiment on the Ehrlich ascetic carcinoma cells’ destruction was carried out successively using a low-frequency alternating magnetic field. The number of cells destroyed as a result of their interaction with Fe3O4@C nanoparticles in an alternating magnetic field was 27%, compared with the number of naturally dead control cells of 6%.

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Section: Introductionmentioning

confidence: 99%

Core–Shell Fe3O4@C Nanoparticles for the Organic Dye Adsorption and Targeted Magneto-Mechanical Destruction of Ehrlich Ascites Carcinoma Cells

et al. 2022

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“…These methods have a variety of disadvantages, including as high operating costs, pollution transfer from one phase to another, and the challenge of eliminating biologically or chemically persistent contaminants. Advanced oxidation processes (AOPs) are the most effective way to remove pollutants from water because they can produce powerful oxidizing agents at ambient temperature and normal atmospheric pressure [27][28][29][30]. Heterogeneous photocatalysis has proven to be a more successful method for addressing energy and environmental concerns as an oxidation mechanism.…”

Section: Introductionmentioning

confidence: 99%

Recent Developments on Magnetically Separable Ferrite‐Based Nanomaterials for Removal of Environmental Pollutants

Pansambal

Roy

Mohamed

et al. 2022

Journal of Nanomaterials

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The current water supply situation demonstrates the predominance of contamination caused by industrial effluent runoff. Polluted waters have contributed to significant health and environmental risks, calling for an acceptable alternative to address the effects. However, diverse chemical and treatment physical stages commonly used for dye effluent processing are more cost-intensive, less effective, and time-consuming. Instead, nanomaterials have developed as a good alternative for dye removal and degradation because of their special chemical reactivity and superior surface features/properties. In this regard, the ability of modified or hybrid ferrite-based magnetically recoverable nanomaterials in dye effluent treatment has been extensively explored. The present study especially emphasizes magnetic ferrite (Fe3O4 + X) or metal-doped ferrite (MFe2O4 + X) nanocomposite for dye degradation (where M consists of Co, Cu, Zn, Mg, Mn, Ni, etc., and X consists of reduced graphene oxide, graphene oxide, metal, or metal oxide). Several dye degradation efficiencies of various ferrite and metal ferrite nanomaterial were discussed. Degradation is carried out using direct sunlight, and various lamps (e.g., visible light/UV-C lamp/halogen lamp/Mercury-Xenon lamp/UV lamp with UV filter for visible light) are used as a source. This review article covers the degradation of various dyes from wastewater using ferrite-based nanomaterial as an efficient catalyst and making water pollution free.

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