Water Contaminated by Industrial Textile Dye: Study on Decolorization Process

Luca, Pierantonio De; Foglia, Paola; Siciliano, Carlo; Nagy, J.B.; Macario, Anastasia

doi:10.3390/environments6090101

Cited by 18 publications

(9 citation statements)

References 95 publications

(93 reference statements)

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“…Moreover, wastewater contaminated with azo dyes, mainly from the textile industry, has been the subject of research using photodegradation and sonication techniques for their treatment [69,70]. Other studies have successfully highlighted the use of biopolymers [71,72] and microgel [73].…”

Section: Introductionmentioning

confidence: 99%

Treatment of Water Contaminated with Reactive Black-5 Dye by Carbon Nanotubes

Luca

Nagy

2020

Materials

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Most of the dyes used today by the textile industry are of synthetic origin. These substances, many of which are highly toxic, are in many cases not adequately filtered during the processing stages, ending up in groundwater and water courses. The aim of this work was to optimize the adsorption process of carbon nanotubes to remove an azo-dye, called Reactive Black-5, from aqueous systems. Particular systems containing carbon nanotubes and dye solutions were analyzed. Furthermore, the reversibility of the process and the presence of possible degradation phenomena by the dye molecules were investigated. For this purpose, the influence of different parameters on the adsorption process, such as the nature of the carbon nanotubes (purified and nonpurified), initial concentration of the dye, stirring speed, and contact times, were studied. The solid and liquid phases after the tests were characterized by chemical-physical techniques such as thermogravimetric analysis (TG, DTA), UV spectrophotometry, BET (Brunauer, Emmett, Teller), and TOC (total organic carbon) analysis. The data obtained showed a high adsorbing capacity of carbon nanotubes in the removal of the Reactive Black-5 dye from aqueous systems. Furthermore, the efficiency of the adsorption process was observed to be influenced by the stirring speed of the samples and the contact time, while purified and nonpurified nanotubes provided substantially the same results.

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Section: Introductionmentioning

confidence: 99%

Treatment of Water Contaminated with Reactive Black-5 Dye by Carbon Nanotubes

Luca

Nagy

2020

Materials

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“…The use of carbon materials, such as graphene and nanotubes, can facilitate the extraction of metabolites from complex matrices [59][60][61][62], allowing the selective recovery of whole classes of organic compounds based on the electronic interactions between the carbon structure of the extractive solid medium and the molecular structures of metabolites. Extractions with these carbon materials could better work by simply choosing the ideal organic solvent systems [63,64]. In this context, multiwalled carbon nanotubes (MWCNTs) have successfully been proposed [65].…”

Section: Beer Analysis By Extractionmentioning

confidence: 99%

High-resolution NMR and MALDI-MS molecular profiling of craft beers

Siciliano

Procopio

2022

IOP Conf. Ser.: Mater. Sci. Eng.

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Beer is a complex aqueous mixture of organic and inorganic compounds, such as carbohydrates obtained from barley or wheat malts, hops and yeast, ethanol, proteins, vitamins, and minerals. Phenols and their derivatives obtained by chemical interactions with biogenic amines, together superior alcohols and amino acids, are the other compounds present in minor proportions in beer, Phenolic components possess high antioxidant activities, and regulate the oxidative stability of beer, although bitterness of this beverage originates from hops. Since these antioxidants can produce beneficial effects on the human health after consumption, it is challenging to have in hand the molecular profiles of beers, in order to investigate their contents in bioactive compounds. Today, a significant number of small producers have strongly invested in craft beers, produced by using different hop blends, starting materials that are rich in phenolic antioxidants. The present work discloses an instrumental analytical method which enables the rapid obtainment of the molecular profiling of craft beers, with the assistance of selective extractions made by using multi-walled carbon nanotubes (MWCNTs). In this investigation, high-resolution 1H NMR, and LDMS and MS/MS analysis were applied for the “beeromic” analysis of a craft beer brewed in Calabria (the Southern part of Italy). The spectral data, confirmed that this kind of beer predominantly contains the hop bitter metabolites humolones and lupulones, also highlighting the presence of phenols and phenolamides which are known for their bioactivity against cancer. A profile of the principal volatile hop components was also obtained by GC-MS.

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“…Textile wastewater treatments are carried out through different processes such as biological [13][14][15][16][17][18][19], oxidative [20][21][22], coagulation [23][24][25][26], flocculation [27], membranes [28,29], and photocatalysis [30][31][32][33][34][35][36].…”

Section: Introductionmentioning

confidence: 99%

Semi-Continuous Adsorption Processes with Multi-Walled Carbon Nanotubes for the Treatment of Water Contaminated by an Organic Textile Dye

et al. 2021

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Adsorbent columns, containing different amounts of multi-walled carbon nanotubes (MWCNTs), in a semicontinuous process were studied. The optimal conditions for the discoloration of water contaminated by an azoic organic textile dye were investigated. In particular, as representative of contaminated water, a highly concentrated solution of Reactive Black 5 (RB5) equal to 37 mg/L was utilized. A predetermined volume of dye solution, equal to 100 mL, was subjected to repeated cycles of adsorption until the eluted solution became colorless. This adsorption operation was carried out for different types of columns. Adsorbent performances as a function of characteristics of each column were investigated. For each column, the optimum quantity of MWCNTs, maximum volume of treatable solution, carbon usage rate (CUR), empty bed contact time (EBCT), and adsorption capacity were determined. The permeate was characterized by UV-VIS analysis and TOC analysis, while adsorbent material (MWCNTs) was characterized by thermogravimetric TG-DTA analysis. The column containing 2.5 g of carbon nanotubes was revealed to be the best one for the total amount of Reactive Black 5 adsorbed, i.e., 55 mg/g(MWCNTs) The research has shown the high adsorption efficiency of carbon nanotubes toward RB5 dye, highlighting the degradation of the dye molecule and the stratification, inside the columns, of the adsorbed compound.

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Water Contaminated by Industrial Textile Dye: Study on Decolorization Process

Cited by 18 publications

References 95 publications

Treatment of Water Contaminated with Reactive Black-5 Dye by Carbon Nanotubes

Treatment of Water Contaminated with Reactive Black-5 Dye by Carbon Nanotubes

High-resolution NMR and MALDI-MS molecular profiling of craft beers

Semi-Continuous Adsorption Processes with Multi-Walled Carbon Nanotubes for the Treatment of Water Contaminated by an Organic Textile Dye

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