Removal of rhodamine B (a basic dye) and thoron (an acidic dye) from dilute aqueous solutions and wastewater simulants by ion flotation

Shakir, K.; Elkafrawy, Ahmed Faouzy; Ghoneimy, Hussein F.; Beheir, Shokry Gad Elrab; Refaat, Mamdoh

doi:10.1016/j.watres.2009.10.029

Cited by 234 publications

(85 citation statements)

References 39 publications

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“…These include physical methods, such as adsorption (Walker & Weatherley, 2001), electrocoagulation (Cañizares, Martínez, Jiménez, Lobato, & Rodrigo, 2006), and flotation (Shakir, Elkafrawy, Ghoneimy, Beheir, & Refaat, 2010), as well as chemical and biochemical methods, like photocatalytic degradation (Akpan & Hameed, 2009), microbial degradation (van der Zee & Villaverde, 2005), and enzymatic decomposition (Wang & Yu, 1999). While much research has been devoted to improving the efficiency and cost effectiveness of these methods (Crini, 2006;Gaya & Abdullah, 2008), many of the above stated technologies are economically and technologically impractical for most industrial dye removal applications (Verma, Dash, & Bhunia, 2012).…”

Section: Introductionmentioning

confidence: 99%

Application of the central composite design to study the flocculation of an anionic azo dye using quaternized cellulose nanofibrils

Quinlan

Tanvir

Tam

2015

Carbohydrate Polymers

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Section: Introductionmentioning

confidence: 99%

Application of the central composite design to study the flocculation of an anionic azo dye using quaternized cellulose nanofibrils

Quinlan

Tanvir

Tam

2015

Carbohydrate Polymers

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“…In addition, other authors explored photocatalytic materials in the photodegradation of Rhodamine-B (RB), which is a brilliant soluble basic dye, most used in the dyeing of various products of the textile industry such as cotton, silk, paper, leather, and others. Notably, RB imparts an intense color to polluted wastewaters derived from different industries and from scientific laboratories [236]. In particular, for RhB photodegradation, Chen Q. et al [237] used electrospinning and the hydrothermal reaction in mixed ethanol/water solution to prepare nanocomposites composed from rGO and TiO 2 nanotubes.…”

Section: Photocatalytic Degradation Of Dyes With Gtio 2 Nsmentioning

confidence: 99%

Recent Advances in Graphene Based TiO2 Nanocomposites (GTiO2Ns) for Photocatalytic Degradation of Synthetic Dyes

et al. 2017

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Synthetic dyes are widely used in textile, paper, food, cosmetic, and pharmaceutical industries. During industrial processes, some of these dyes are released into the wastewater and their successive release into rivers and lakes produces serious environmental problems. TiO 2 is one of the most widely studied and used photocatalysts for environmental remediation. However, it is mainly active under UV-light irradiation due to its band gap of 3.2 eV, while it shows low efficiency under the visible light spectrum. Regarding the exploration of TiO 2 activation in the visible light region of the total solar spectrum, the incorporation of carbon nanomaterials, such as graphene, in order to form carbon-TiO 2 composites is a promising area. Graphene, in fact, has a large surface area which makes it a good adsorbent for organic pollutants removal through the combination of electrostatic attraction and π-π interaction. Furthermore, it has a high electron mobility and therefore it reduces the electron-hole pair recombination, improving the photocatalytic activity of the semiconductor. In recent years, there was an increasing interest in the preparation of graphene-based TiO 2 photocatalysts. The present short review describes the recent advances in TiO 2 photocatalyst coupling with graphene materials with the aim of extending the light absorption of TiO 2 from UV wavelengths into the visible region, focusing on recent progress in the design and applications in the photocatalytic degradation of synthetic dyes.

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“…Although various chemical and physical process are available for the degradation of textile effluents but they generate non-biodegradable contaminations and further require treatment involving expensive procedure. Conventional techniques such as coagulation/ flocculation, membrane separation, absorption methods as well as biological methods are also inefficient for removal of complex organic compounds [4][5][6][7][8][9][10][11]. To resolve such types of problems Advanced Oxidation Processes (AOPs) are proven to be most promising technique which is based on the generation of highly reactive hydroxyl radicals ( · OH) [12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

PHOTOCATALYTIC ACTIVITY OF TiO2 NANOMATERIAL

Jain

Vaya

2017

J. Chil. Chem. Soc.

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Nanomaterials synthesize by different techniques exhibit excellent photocatalytic activity. These catalysts could be employed for environmental remediation, renewable energy sources, photocatalysis and many other applications in various fields. Nanophotocatalyst has been used for the treatment of hazardous materials such as industrial effluents containing complex organic compounds, dyes and metal ions successfully. The multidimensional study of composition, shape, size, surface area and nanostructure and different operating parameters like pH, concentration, temperature etc, of these photocatalyst help in current and further development of photocatalysts for different applications . The photocatalytic activity of nanoparticles has made a great contribution in providing definitive mechanistic information about the photocatalytic processes.The main aim of this review paper is to give an overview of the enhanced photocatalytic activities of titanium dioxide (TiO 2 ) nanoparticles. This review includes the basic properties of photocatalyst and mechanim of photocatalysis process followed by unique photocatalytic properties and research of TiO 2 nanoparticles as photocatalysts. An effort has also been made to give an overview of expedient photocatalytic activity of these doped nanoparticles. Many investigators have reported the enhanced photocatalytic activity by the degradation of dyes as a model compound.Key Words: photocatalysts, TiO 2 , nanoparticles, AOPs. INTRODUCTIONToday, the industrial revolution is putting its negative impacts on the entire globe. Over the year's complexities, varieties and the amount of hazardous compounds are increasing in wastewater discharged by various printing, dyeing, textile and other chemical industries into the ecosystem. These compounds are highly carcinogenic and mutagenic. Apart from aesthetic pollution, they are causing eutrophication, high Chemical Oxygen Demand (COD) and Biological Oxygen Demand (BOD). In addition to that, these compounds absorb sunlight strongly which affects the photosynthetic activity of aquatic plants and seriously threatening the whole ecosystem [1,2]. Now days the perilous effects of organic dyes to the environment is a particular concern. To resolve this problem, the photocatalytic decomposition processes are being employed by many researchers to degrade the organic pollutants of industrial wastewater before discharge into receiving media [3]. Although various chemical and physical process are available for the degradation of textile effluents but they generate non-biodegradable contaminations and further require treatment involving expensive procedure. Conventional techniques such as coagulation/ flocculation, membrane separation, absorption methods as well as biological methods are also inefficient for removal of complex organic compounds [4][5][6][7][8][9][10][11]. To resolve such types of problems Advanced Oxidation Processes (AOPs) are proven to be most promising technique which is based on the generation of highly reactive hydroxyl radica...

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Removal of rhodamine B (a basic dye) and thoron (an acidic dye) from dilute aqueous solutions and wastewater simulants by ion flotation

Cited by 234 publications

References 39 publications

Application of the central composite design to study the flocculation of an anionic azo dye using quaternized cellulose nanofibrils

Application of the central composite design to study the flocculation of an anionic azo dye using quaternized cellulose nanofibrils

Recent Advances in Graphene Based TiO2 Nanocomposites (GTiO2Ns) for Photocatalytic Degradation of Synthetic Dyes

PHOTOCATALYTIC ACTIVITY OF TiO2 NANOMATERIAL

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