Removal of Organic Pollutants from Water by Improved Carbon Nanotubes
Organic pollutants soluble in water such as chlorine compounds, biphenyls and aldrins caused by dyes, detergents, herbicides and toxins cannot be removed in conventional purification processes such as filtration. Carbon nanotubes have a high ability to separate organic pollutants, but its slurry app...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Water and Wastewater Consulting Engineers Research Development
2023-10-01
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| Series: | آب و فاضلاب |
| Subjects: | |
| Online Access: | https://www.wwjournal.ir/article_185507_4d598380fe2e8f9e425df45e21b80a21.pdf |
| _version_ | 1797338450906578944 |
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| author | Mohammad Reza Fadaei Tehrani Saeed Skandari |
| author_facet | Mohammad Reza Fadaei Tehrani Saeed Skandari |
| author_sort | Mohammad Reza Fadaei Tehrani |
| collection | DOAJ |
| description | Organic pollutants soluble in water such as chlorine compounds, biphenyls and aldrins caused by dyes, detergents, herbicides and toxins cannot be removed in conventional purification processes such as filtration. Carbon nanotubes have a high ability to separate organic pollutants, but its slurry application is not desirable due to the need to remove them at the end of purification. In the present study, upgraded carbon nanotubes attached to particles of sand filters (CNTsand) were synthesized and used to remove organic pollutants. The capacity and efficiency of these nanotubes and the variables affecting it including pH, temperature, contact time and concentration were investigated. Also, reaction kinetics and adsorption isotherms were analyzed. The results showed that CNTsand has a high capacity to remove organic compounds. The data processing showed the pseudo-second order kinetic model for the elimination reaction and the Langmuir isotherm was the most consistent. The reaction enthalpy change equal to ΔH=11.02 kJ/mol and the free energy change from ΔG=-7.32 to -9.20 kJ/mol both indicate an endothermic and thermodynamically spontaneous reaction. Therefore, the adequacy and efficiency of the upgraded nanotube coating on sand grains in removing organic pollutants was confirmed. |
| first_indexed | 2024-03-08T09:31:25Z |
| format | Article |
| id | doaj.art-dd94206413d145f5bb3fdd4d253a70aa |
| institution | Directory Open Access Journal |
| issn | 1024-5936 2383-0905 |
| language | English |
| last_indexed | 2024-03-08T09:31:25Z |
| publishDate | 2023-10-01 |
| publisher | Water and Wastewater Consulting Engineers Research Development |
| record_format | Article |
| series | آب و فاضلاب |
| spelling | doaj.art-dd94206413d145f5bb3fdd4d253a70aa2024-01-31T03:54:42ZengWater and Wastewater Consulting Engineers Research Developmentآب و فاضلاب1024-59362383-09052023-10-0134412110.22093/wwj.2023.385457.3324185507Removal of Organic Pollutants from Water by Improved Carbon NanotubesMohammad Reza Fadaei Tehrani0Saeed Skandari1Assist. Prof. and Faculty Member of the Higher Education Institute of Water and Electricity, Energy Research Institute, Tehran, IranPhD. Graduated Student, Civil Engineering, Environmental Orientation, University of Tehran, Tehran, IranOrganic pollutants soluble in water such as chlorine compounds, biphenyls and aldrins caused by dyes, detergents, herbicides and toxins cannot be removed in conventional purification processes such as filtration. Carbon nanotubes have a high ability to separate organic pollutants, but its slurry application is not desirable due to the need to remove them at the end of purification. In the present study, upgraded carbon nanotubes attached to particles of sand filters (CNTsand) were synthesized and used to remove organic pollutants. The capacity and efficiency of these nanotubes and the variables affecting it including pH, temperature, contact time and concentration were investigated. Also, reaction kinetics and adsorption isotherms were analyzed. The results showed that CNTsand has a high capacity to remove organic compounds. The data processing showed the pseudo-second order kinetic model for the elimination reaction and the Langmuir isotherm was the most consistent. The reaction enthalpy change equal to ΔH=11.02 kJ/mol and the free energy change from ΔG=-7.32 to -9.20 kJ/mol both indicate an endothermic and thermodynamically spontaneous reaction. Therefore, the adequacy and efficiency of the upgraded nanotube coating on sand grains in removing organic pollutants was confirmed.https://www.wwjournal.ir/article_185507_4d598380fe2e8f9e425df45e21b80a21.pdforganic pollutantscarbon nanotubewater refinerysand filter |
| spellingShingle | Mohammad Reza Fadaei Tehrani Saeed Skandari Removal of Organic Pollutants from Water by Improved Carbon Nanotubes آب و فاضلاب organic pollutants carbon nanotube water refinery sand filter |
| title | Removal of Organic Pollutants from Water by Improved Carbon Nanotubes |
| title_full | Removal of Organic Pollutants from Water by Improved Carbon Nanotubes |
| title_fullStr | Removal of Organic Pollutants from Water by Improved Carbon Nanotubes |
| title_full_unstemmed | Removal of Organic Pollutants from Water by Improved Carbon Nanotubes |
| title_short | Removal of Organic Pollutants from Water by Improved Carbon Nanotubes |
| title_sort | removal of organic pollutants from water by improved carbon nanotubes |
| topic | organic pollutants carbon nanotube water refinery sand filter |
| url | https://www.wwjournal.ir/article_185507_4d598380fe2e8f9e425df45e21b80a21.pdf |
| work_keys_str_mv | AT mohammadrezafadaeitehrani removaloforganicpollutantsfromwaterbyimprovedcarbonnanotubes AT saeedskandari removaloforganicpollutantsfromwaterbyimprovedcarbonnanotubes |