Degradation of Methyl Orange and Congo Red dyes by using TiO2 nanoparticles activated by the solar and the solar-like radiation

Ljubas, Davor; Smoljanić, Goran; Juretić, Hrvoje

doi:10.1016/j.jenvman.2015.06.042

Cited by 85 publications

(35 citation statements)

References 47 publications

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“…As appeared in Table-5, the comparative dye's uptake of different TiO2-based nanoparticles shows that the investigated sorbent has better removal capacity than other TiO2-based subsidiaries given in literature [26][27][28][29][30] showing high potential as a competent material for extraction of harmful species from polluted liquid sources.…”

Section: Temkin Isothermmentioning

confidence: 95%

Removal of Orange 2G Dye from Aqueous Solutions Using TiO2-Based Nanoparticles: Isotherm and Kinetic Studies

Al-Arfaj¹,

Alakhras²,

Alabbad³

et al. 2018

Asian J. Chem.

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In the current study, the removal of Orange 2G dye founded in aqueous solutions using titanium dioxide-based nanoparticles has been investigated. Titanium dioxide nanoparticles were successfully prepared using tetrabutyl ammonium bromide (TTAB) as a surfactant by sol-gel method and characterized by X-ray diffraction, BET surface area, IR and TEM spectroscopy. The experimental data is most fitting with Freundlich isotherm model indicating heterogeneity of sorbent surface. Langmuir data revealed that the maximum removal capacity of Orange 2G equals to 85.47 mg g -1 . Kinetic studies disclosed that intraparticle diffusion is not the only rate-determining step and the removal process is organized by a chemical reaction as well.

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Section: Temkin Isothermmentioning

confidence: 95%

Removal of Orange 2G Dye from Aqueous Solutions Using TiO2-Based Nanoparticles: Isotherm and Kinetic Studies

Al-Arfaj¹,

Alakhras²,

Alabbad³

et al. 2018

Asian J. Chem.

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“…Zero valent silver nanoparticle deposited TiO 2 composite Ag/TiO 2 showed a good efficiency for the degradation of MB under the UV-C irradiation [155]. The photo-catalytic activity of Ag/TiO 2 essentially depends on the experimental conditions.…”

Section: The New Promising Semiconductors In Photo-degradation Of Dyesmentioning

confidence: 99%

Advances in Photo-catalytic Materials for Environmental Applications

Ra¹

2016

Res. Rev. J Mat. Sci

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INTRODUCTIONOver two thirds of Earth's surface is covered by water; less than a third is taken up by land. As Earth's population continues to grow, people are putting ever-increasing pressure on the planet's water resources. In a sense, our oceans, rivers, and other inland waters are being "squeezed" by human activities-not so they take up less room, but so their quality is reduced. Poorer water quality means water pollution. We know that pollution is a human problem because it is a relatively recent development in the planet's history: before the 19 th century Industrial Revolution, people lived more in harmony with their immediate environment. As industrialization has spread around the globe, so the problem of pollution has spread with it. When Earth's population was much smaller, no one believed pollution would ever present a serious problem. It was once popularly believed that the oceans were far too big to pollute. Today, with around 7 billion people on the planet, it has become apparent that there are limits. Pollution is one of the signs that humans have exceeded those limits.Water pollution can be defined in many ways. Usually, it means one or more substances have built up in water to such an extent that they cause problems for animals or people. Water pollution almost always means that some damage has been done to an ocean, river, lake, or other water source. A 1969 United Nations report defined ocean pollution as: "The introduction by man, directly or indirectly, of substances or energy into the marine environment (including estuaries) resulting in such deleterious effects as harm to living resources, hazards to human health, hindrance to marine activities, including fishing, impairment of quality for use of sea water and reduction of amenities."Most water pollution doesn't begin in the water itself. Take the oceans: around 80 percent of ocean pollution enters our seas from the land. Virtually any human activity can have an effect on the quality of our water environment. When farmers fertilize the fields, the chemicals they use are gradually washed by rain into the groundwater or surface waters nearby. Sometimes the causes of water pollution are quite surprising. Chemicals released by smokestacks (chimneys) can enter the atmosphere and then fall back to earth as rain, entering seas, rivers, and lakes and causing water pollution. That's called atmospheric deposition. Water pollution has many different causes like: Sewage, Nutrients, Chemical waste, radioactive waste, Oil pollution, Plastics and Alien species. The common pollutants include toxic organic compounds like chlorinated and non-chlorinated aliphatic and aromatic compounds, dyes, inorganic compounds like heavy metals, noxious gases like NO x , SO x , CO and NH 3 , and pathogens like bacteria, fungi and viruses. ABSTRACTThe growth of industry worldwide has extremely increased the generation and accumulation of waste by products. This has caused severe environmental problems that have become a major concern. Because of this, photo-catalytic polluta...

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“…The values of k 1 , k 2 and R 2 for the degradation rate of CR with various concentrations of CR are given in Table 2. The slow degradation of CR after 60 min of reaction time may be clarified by the difficulty in changing the N atoms of the CR into oxidized nitrogen compounds and the slow reaction of short chain aliphatics with hydroxyl radicals; furthermore, the higher number of azo-groups in dye molecule decreases the degradation process [33].…”

Section: Effect Of Ph Values On Cr Degradationmentioning

confidence: 99%

Potential degradation of hazardous dye Congo red by nano-metallic particles synthesized from the automobile shredder residue

Singh

Kalamdhad

Koduru

2017

Nanotechnol. Environ. Eng.

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This study was carried out on the degradation of Congo red (CR) in an aqueous solution by nano-metallic particles (NMPs). The NMPs were synthesized from the leachate of automobile shredder residue. Scanning electron microscopy was performed to analyze the morphology of particles. Fourier transform infrared spectroscopy (FTIR) was also done to demonstrate the possibility and changes of various functional groups before and after the reaction of NMPs. The effect of the dosages of NMPs, pH values of solution, concentrations of CR and H 2 O 2 on CR degradation was studied. The results of the present study confirm that the CR degradation rate was improved by increasing the dosages of NMPs and H 2 O 2 up to certain limit and then reduced gradually. However, degradation rate was reduced by raising the pH values and concentration of CR. The pseudo-second-order kinetics was found to be suitable for the degradation of CR by NMPs under Fenton-like process.

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Degradation of Methyl Orange and Congo Red dyes by using TiO2 nanoparticles activated by the solar and the solar-like radiation

Cited by 85 publications

References 47 publications

Removal of Orange 2G Dye from Aqueous Solutions Using TiO2-Based Nanoparticles: Isotherm and Kinetic Studies

Removal of Orange 2G Dye from Aqueous Solutions Using TiO2-Based Nanoparticles: Isotherm and Kinetic Studies

Advances in Photo-catalytic Materials for Environmental Applications

Potential degradation of hazardous dye Congo red by nano-metallic particles synthesized from the automobile shredder residue

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