Polycyclic aromatic hydrocarbons (PAHs) around tea processing industries using high-sulfur coals

Saikia, Jyotilima; Khare, Puja; Saikia, Pallabi; Saikia, Binoy K.

doi:10.1007/s10653-016-9879-0

Cited by 25 publications

(6 citation statements)

References 82 publications

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“…Nanoparticles including fullerenes are generally produced during the combustion of coal and in coal-handling process as a byproduct covered with other hazardous elements [103]. Further, Tiwari et al, 2016, concluded that, besides the above by-products, there is formation of fullerene aggregates (C 60 ) in terms of mass of C 60 per mass of particulate matter while handling coal combustion activities [104,105]. The HRTEM investigation revealed that there is an abundance of fullerene content on the agglomerates of nanocarbon surfaces.…”

Section: Tribo-electrostatic Separation (Tes)mentioning

confidence: 99%

Recent Advances in Methods for the Recovery of Carbon Nanominerals and Polyaromatic Hydrocarbons from Coal Fly Ash and Their Emerging Applications

Alam

Yadav

et al. 2021

Crystals

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Coal fly ash is found to be one of the key pollutants worldwide due to its toxic heavy metal content. However, due to advancements in technology, coal fly ash has gained importance in various emerging fields. They are rich sources of carbonaceous particles which remain unburnt during burning of various coals in thermal power plants (TPPs). Various carbonaceous nanoparticles in the form of fullerenes, soot, and carbon nanotubes could be recovered from coal fly ash by applying trending techniques. Moreover, coal fly ash is comprised of rich sources of organic carbons such as polycyclic and polyaromatic hydrocarbons that are used in various industries for the development of carbon-derived value-added materials and nanocomposites. Here, we focus on all the types of carbon nanominerals from coal fly ash with the latest techniques applied. Moreover, we also emphasize the recovery of organic carbons in polyaromatic (PAHs) and polycyclic hydrocarbons (PCHs) from coal fly ash (CFA). Finally, we try to elucidate the latest applications of such carbon particle in the industry.

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Section: Tribo-electrostatic Separation (Tes)mentioning

confidence: 99%

Recent Advances in Methods for the Recovery of Carbon Nanominerals and Polyaromatic Hydrocarbons from Coal Fly Ash and Their Emerging Applications

Alam

Yadav

et al. 2021

Crystals

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“…The extract was evaporated and solvent exchanged with toluene (1 mL) for analysis. Sixteen US-EPA PAHs were measured by the high-performance liquid chromatography (HPLC) technique (Shimadzu HPLC-PDA) using different concentrations of EPA 610 PAH mix-standards (Sigma-Aldrich) for calibration by using the methods reported elsewhere …”

Section: Methodsmentioning

confidence: 99%

“…Sixteen US-EPA PAHs were measured by the high-performance liquid chromatography (HPLC) technique (Shimadzu HPLC-PDA) using different concentrations of EPA 610 PAH mix-standards (Sigma-Aldrich) for calibration by using the methods reported elsewhere. 26 The tissuquartz filter was cut into three parts, one part used for the analysis of the surface chemical mass compositions by using time-of-flight secondary ion mass spectroscopy (ToF-SIMS) 27 (Physical Electronics, PHI TRIFT V NANO TOF). The filter samples were cut into 10 mm × 10 mm pieces to insert in the ToF-SIMS sample holder.…”

Section: Introductionmentioning

confidence: 99%

Meteorological Influence and Chemical Compositions of Atmospheric Particulate Matters in an Indian Urban Area

Rabha

Saikia

Singh

et al. 2021

ACS Earth Space Chem.

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Meteorological conditions essentially impact the emission, distribution, formation, and characteristics of particulate matter (e.g., PM 2.5 ) in the atmosphere. In this study, sampling and chemical analysis of PM 2.5 were carried out for about two winter months during December 2018 and January 2019 to determine their chemical components and possible emission sources in a Northeast Indian urban area (Jorhat). PM 2.5 mass concentrations were observed to be varied from 81.65 to 193.34 μg m −3 with an average of 117.75 μg m −3 , exceeding the permissible limit (60 μg m −3 ) of the National Ambient Air Quality Standards (NAAQS) of India. The average total water-soluble ions account for 12.27% of total PM 2.5 mass, of which anions contributed up to 50.52% and cations contributed 49.48%. The correlations among the watersoluble ionic species indicate the formation of NH 4 NO 3 and (NH 4 ) 2 SO 4 as major ammonium products with high ammonium concentration (30.73% of the total water-soluble aerosol mass) making the PM 2.5 alkaline. A high concentration of acenaphthylene and naphthalene was also found out of the 16 US EPA poly-aromatic hydrocarbons (PAHs). The correlation study between the chemical components and the meteorological parameters pointed out coal and biomass burning as the main contributor to such high winter loading in Northeast India. Also, the formation of secondary organic carbon up to 21.84 μg m −3 was observed due to suitable meteorological conditions during winter.

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“…Raw plant materials that can be used by the patients are usually exposed to high microbial load [26]. Another group of contaminants found in medicinal plants is polycyclic aromatic hydrocarbons (PAH), including, benzo(a) pyrene, benzo(a)anthracene, benzo(a)fluoroanthene and chrysene [27,28]. Medicinal plants are usually contaminated with pyrrolizidine alkaloids (PA), which are hepatotoxic and genotoxic with carcinogenic risks for human [29,30].…”

Section: State-of-the-art Knowledgementioning

confidence: 99%

Prospects for the use of herbal medicines in relation to progressing environmental pollution

Łuszczki¹,

Gustaw-Rothenberg²,

Chmielewski³

et al. 2020

Med Środow.

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Due to the increasing pollution of the natural environment, the amount of impurities that can accumulate in herbs and plants used for therapeutic purposes as medicinal plants also increases. As many plant materials have medicinal properties and have been used as medicinal remedies,they must be subjected to rigorous assessments according to material quality standards.Presently, however, there is no guarantee that there has been no change in the amount and content of medicinal bioactive substances, compared to plants used years ago in traditional folk medicine. At present, there are great prospects in the use of medical plants, especially if the medicinal plants are free from pollution originating from the contaminated natural environment. The attention of researchers should focus not only on seeking new bioactive compounds and finding new drugs in plants, but also on ensuring high standards of quality regarding the evaluation of the chemical purity of plants growing in the environment exposed to contamination and pollution. The combination of both challenges can help patients suffering from increasing numbers of ailments and diseases of civilization. Researchers must also be actively involved in the process of detection any harmful substances penetrating from the environment into plants by applying various biomedical and chemical techniques to detect some novel, as yet unknown threats, in order not to expose patients to them.

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Polycyclic aromatic hydrocarbons (PAHs) around tea processing industries using high-sulfur coals

Cited by 25 publications

References 82 publications

Recent Advances in Methods for the Recovery of Carbon Nanominerals and Polyaromatic Hydrocarbons from Coal Fly Ash and Their Emerging Applications

Recent Advances in Methods for the Recovery of Carbon Nanominerals and Polyaromatic Hydrocarbons from Coal Fly Ash and Their Emerging Applications

Meteorological Influence and Chemical Compositions of Atmospheric Particulate Matters in an Indian Urban Area

Prospects for the use of herbal medicines in relation to progressing environmental pollution

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