A review on applications of nanoparticles for the preconcentration of environmental pollutants

Kaur, Anupreet; Gupta, Usha

doi:10.1039/b901933b

Cited by 137 publications

(54 citation statements)

References 154 publications

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“…These methods, however, are limited because they are too expensive to find a wide application, ineffective in meeting stringent effluent standards, and could result in huge amount of sludge. Nanoparticle technology (i.e., the technology related to the preparation and application of materials at nanoscale, 1-100 nm) has emerged as a fascinating area of interest for removal of various contaminants from wastewater effluents (Nassar, 2012a(Nassar, , 2013Savage and Diallo, 2005;El Saliby et al, 2009;Kaur and Gupta, 2009;Narayan, 2010;Xu et al, 2012). Nanoparticles can be employed as an alternate method for OMW treatment.…”

Section: Introductionmentioning

confidence: 98%

Treatment of olive mill based wastewater by means of magnetic nanoparticles: Decolourization, dephenolization and COD removal

Nassar

Arar

Marei

et al. 2014

Environmental Nanotechnology, Monitoring & Management

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Please cite this article in press as: Nassar, N.N., et al., Treatment of olive mill based wastewater by means of magnetic nanoparticles: Decolourization, dephenolization and COD removal. Environ. Nanotechnol. Monit. Manag. (2014), http://dx. a b s t r a c tOlive mill wastewater (OMW) is an environmental concern that has been highlighted as a serious environmental problem in the Mediterranean basin countries because of its high organic load and phytotoxic and antibacterial phenolic compounds, which resist biological degradation. Consequently, this type of wastewater represents a huge challenge for the conventional wastewater treatment techniques as it can impact the lifetime of bacteria needed for the treatment. Iron-oxide nanoparticles are attractive for wastewater treatment for two important reasons. First, nanoparticles can remove pollutants from wastewater rapidly. Second, this magnetic type of nanoparticles could be separated easily using a magnet after finishing treatment process. In this study, we aimed at investigating the effectiveness of the magnetic iron oxide nanoparticles in the removal of large organic contaminants from OMW. Batch and continuous mode processes were applied on OMW treatment to determine the effect of contact time, solution pH, coexisting contaminants and the adsorption isotherm.The results showed that the adsorption was fast and the adsorption reached equilibrium within less than 30 min. The adsorption equilibrium data fit very well to the Brunauer-Emmett-Teller (BET) Model, indicating multi-layers adsorption. The adsorption of major pollutants was associated to an efficient removal of coexisting contaminants such as heavy metals and free ions. The adsorption of OMW pollutants was dependent on pH of the solution. Finally, continuous-mode process was tested successfully using a packed bed column that combined sand filtration with magnetic nanoparticles to decolourize OMW effluent. This study will provide valuable insight on the effect of nanoparticles toward the treatment and recyclability of olive mill wastewater, which is crucial for the local olive mill industry. After seeing the successful achievement of integrating nanoparticles with fixed bed filtration, a preliminary process description and cost estimation of stand-alone plant (with a capacity of 4 m 3 /h) for OMW treatment were considered in this study. Process capital and annual operating costs were estimated to be $12,306 and $476/year, respectively.

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Section: Introductionmentioning

confidence: 98%

Treatment of olive mill based wastewater by means of magnetic nanoparticles: Decolourization, dephenolization and COD removal

Nassar

Arar

Marei

et al. 2014

Environmental Nanotechnology, Monitoring & Management

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“…Therefore, it is necessary to treat textile effluents prior to their discharge into the receiving water [1][2][3][4][5][6]. Up to now, physical adsorption and photocatalytic degradation are considered as two effective and convenient methods for removing of organic dyes [7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

BiOBr hierarchical microspheres: Microwave-assisted solvothermal synthesis, strong adsorption and excellent photocatalytic properties

Zhang

Cao

Chen

et al. 2011

Journal of Colloid and Interface Science

162

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“…[36,37]. Furthermore, because of the high conductivity of Fe 3 O 4 , the rate of electron transport is fast, which suppresses the direct recombination of photoinduced electron-hole pairs in the Fe 3 …”

Section: Figurementioning

confidence: 99%

“…Effluents from the textile industries are important sources of water pollution, because dyes in wastewater undergoes chemical as well as biological changes, consume dissolved oxygen, destroy aquatic life and endanger human health. Therefore, it is necessary to treat textile effluents prior to their discharge into the receiving water [1][2][3][4][5][6].With the intensive development of materials research, various micro-and nano-materials have already been adopted for the treatment of environmental pollutants due to their excellent photocatalytic activities.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Fe3O4@G-C3N4 Nanocomposites for Visible Light Photocatalysis of RhB

Liu¹,

Xü²,

Gao³

et al. 2017

JAN

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Abstract. Visible light-responsive Fe 3 O 4 @g-C 3 N 4 nanocomposites were prepared by hydrothermal method with g-C 3 N 4 nanosheets as the substrates. The photocatalytic performances of the Fe 3 O 4 @g-C 3 N 4 nanocomposites were evaluated in photo Fenton-like discoloration of RhB dye using H 2 O 2 as an oxidant under visible-light irradiation. Meanwhile, the reusability and magnetic properties were also investigated. The results revealed that the Fe 3 O 4 @g-C 3 N 4 nanocomposites showed considerable photocatalytic activity, and exhibited excellent reusability with almost no change after four runs, and more importantly, Fe 3 O 4 @g-C 3 N 4 nanocomposites could be recovered magnetically. Therefore, the fabricated Fe 3 O 4 @g-C 3 N 4 nanocomposite photocatalyst is a promising candidate for energy conversion and environmental remediation.

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A review on applications of nanoparticles for the preconcentration of environmental pollutants

Cited by 137 publications

References 154 publications

Treatment of olive mill based wastewater by means of magnetic nanoparticles: Decolourization, dephenolization and COD removal

Treatment of olive mill based wastewater by means of magnetic nanoparticles: Decolourization, dephenolization and COD removal

BiOBr hierarchical microspheres: Microwave-assisted solvothermal synthesis, strong adsorption and excellent photocatalytic properties

Magnetic Fe<sub>3</sub>O<sub>4</sub>@G-C<sub>3</sub>N<sub>4</sub> Nanocomposites for Visible Light Photocatalysis of RhB

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