Treatment of Water Contaminated with Reactive Black-5 Dye by Carbon Nanotubes
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 proce...
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| Format: | Article |
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MDPI AG
2020-12-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/13/23/5508 |
| _version_ | 1797545900345655296 |
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| author | Pierantonio De Luca Jànos B. Nagy |
| author_facet | Pierantonio De Luca Jànos B. Nagy |
| author_sort | Pierantonio De Luca |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-10T14:22:27Z |
| format | Article |
| id | doaj.art-87e78ff4027e4a3daa225380de2cdb9a |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T14:22:27Z |
| publishDate | 2020-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-87e78ff4027e4a3daa225380de2cdb9a2023-11-20T23:18:26ZengMDPI AGMaterials1996-19442020-12-011323550810.3390/ma13235508Treatment of Water Contaminated with Reactive Black-5 Dye by Carbon NanotubesPierantonio De Luca0Jànos B. Nagy1Dipartimento di Ingegneria Meccanica, Energetica e Gestionale, University of Calabria, I-87030 Arcavacata di Rende (CS), ItalyDipartimento di Ingegneria Meccanica, Energetica e Gestionale, University of Calabria, I-87030 Arcavacata di Rende (CS), ItalyMost 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.https://www.mdpi.com/1996-1944/13/23/5508adsorptioncarbon nanotubesdyereactive black-5 |
| spellingShingle | Pierantonio De Luca Jànos B. Nagy Treatment of Water Contaminated with Reactive Black-5 Dye by Carbon Nanotubes Materials adsorption carbon nanotubes dye reactive black-5 |
| title | Treatment of Water Contaminated with Reactive Black-5 Dye by Carbon Nanotubes |
| title_full | Treatment of Water Contaminated with Reactive Black-5 Dye by Carbon Nanotubes |
| title_fullStr | Treatment of Water Contaminated with Reactive Black-5 Dye by Carbon Nanotubes |
| title_full_unstemmed | Treatment of Water Contaminated with Reactive Black-5 Dye by Carbon Nanotubes |
| title_short | Treatment of Water Contaminated with Reactive Black-5 Dye by Carbon Nanotubes |
| title_sort | treatment of water contaminated with reactive black 5 dye by carbon nanotubes |
| topic | adsorption carbon nanotubes dye reactive black-5 |
| url | https://www.mdpi.com/1996-1944/13/23/5508 |
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