Effect of factors on decolorization of azo dye methyl orange by oxone/natural sunlight in aqueous solution

Li, Qun; Zhang, Zheng; Yang, Xiaoying; Luo, Xingzhang; Zhang, Jibiao; Zheng, Binguo

doi:10.1007/s11356-011-0591-4

Cited by 22 publications

(7 citation statements)

References 28 publications

(29 reference statements)

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“…Its production and use as a pH indicator and as a dye for textiles may result in its release into the environment through various waste streams. MO dye in water is highly visible, even at very low concentrations, which hinders the penetration of light and therefore causes adverse effects on photosynthesis (Liu et al, 2012). CR was the first synthetic dye that could dye cotton directly.…”

Section: Introductionmentioning

confidence: 99%

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

Ljubas

Smoljanić

Juretić

2015

Journal of Environmental Management

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Section: Introductionmentioning

confidence: 99%

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

Ljubas

Smoljanić

Juretić

2015

Journal of Environmental Management

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“…Congo Red (CR) was the first synthetic dye that could dye cotton directly. It is contained in wastewater effluents from the textile, printing and dyeing, paper, rubber and plastics industries [151]. CR is used in medicine as a biological stain and as an indicator since it turns from red-brown in a basic medium to blue in an acidic one [152].…”

Section: Photo-catalytic Degradation Mechanisms Of Dyementioning

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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“…Methyl orange (MO), generally used as an acid-base indicator, is an anionic, water-soluble azo group of synthetic dye. The sequestration of MO from water bodies is an issue of interest for environmental sciences due to the presence of the azo group that causes the mutagenic and carcinogenic degradation products under anaerobic conditions and its low biodegradability [20,[31][32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Tunable aryl alkyl pyrazolium tetrafluoroborate ionic liquids/salts: synthesis, characterization, and applications for removal of methyl orange from aqueous solution

2021

Turk J Chem

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In this work, new tunable aryl alkyl pyrazolium tetrafluoroborate ionic liquids/salts, 2-ethyl-1-(p-X-phenyl)-3,5-dimethylpyrazolium tetrafluoroborate [X: -Br (4a), -OCH3 (4b), -NO2 (4c)] and 2-butyl-1-(p-X-phenyl)-3,5-dimethylpyrazolium tetrafluoroborate [X: -Br (5a), -OCH3 (5b), -NO2 (5c)], were synthesized by following halide-free synthetic route. Their chemical structures were identified through NMR ( 1 H, 13 C, 19 F), IR, elemental analysis, and HRMS data. The synthesized 4a-4c and 5a-5c salts over 90 %. Accordingly, a time-efficient, simple, and highly effective method has been presented to remove methyl orange dye from aqueous solutions.

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Effect of factors on decolorization of azo dye methyl orange by oxone/natural sunlight in aqueous solution

Abstract: Effective for MO decolorization, the oxone/sunlight system improves over the traditional oxone process with advantages of lower costs and avoiding secondary pollution by catalyst.

Cited by 22 publications

References 28 publications

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

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

Advances in Photo-catalytic Materials for Environmental Applications

Tunable aryl alkyl pyrazolium tetrafluoroborate ionic liquids/salts: synthesis, characterization, and applications for removal of methyl orange from aqueous solution

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