Interface interactions between insecticide carbofuran and tea waste biochars produced at different pyrolysis temperatures
Biochars showed a potential as adsorbents for organic contaminants, however, have not been tested for carbofuran, which has been detected frequently in water. This study provides evidences for the use of infused tea residue derived biochar for carbofuran removal. Biochars were produced at 300, 500 a...
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Online Access: | http://dx.doi.org/10.1080/09542299.2016.1198928 |
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doaj-6967b0a8e57f42ceaa1018748ccc26242020-11-25T02:51:58ZengTaylor & Francis GroupChemical Speciation & Bioavailability0954-22992047-65232016-10-01281-411011810.1080/09542299.2016.11989281198928Interface interactions between insecticide carbofuran and tea waste biochars produced at different pyrolysis temperaturesS. S. Mayakaduwa0Meththika Vithanage1Anurudda Karunarathna2Dinesh Mohan3Yong Sik Ok4National Institute of Fundamental StudiesNational Institute of Fundamental StudiesUniversity of PeradeniyaJawaharlal Nehru UniversityKangwon National UniversityBiochars showed a potential as adsorbents for organic contaminants, however, have not been tested for carbofuran, which has been detected frequently in water. This study provides evidences for the use of infused tea residue derived biochar for carbofuran removal. Biochars were produced at 300, 500 and 700 °C by slow pyrolysis and were characterized by proximate and ultimate analysis, FT-IR, SEM, BET and pore size distribution. Pyrolysis temperature showed a pronounced effect on biochar properties. The maximum carbofuran removal was achieved at pH 5. Freundlich and Temkin models best fit the equilibrium data. Biochars produced at 700 °C showed the highest sorption intensity. The adsorption process was likely to be a favorable chemisorption process with electrostatic interactions between carbofuran molecules and biochar surface. Acid-base interactions, electrophilic addition reactions and amide bond formations are the possible mechanisms of carbofuran adsorption. Overall, biochars prepared from tea waste can be utilized as effective adsorbents for removal of aqueous carbofuran.http://dx.doi.org/10.1080/09542299.2016.1198928Isotherm modelingblack carbonpesticidechemisorptionslow pyrolysis |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
S. S. Mayakaduwa Meththika Vithanage Anurudda Karunarathna Dinesh Mohan Yong Sik Ok |
spellingShingle |
S. S. Mayakaduwa Meththika Vithanage Anurudda Karunarathna Dinesh Mohan Yong Sik Ok Interface interactions between insecticide carbofuran and tea waste biochars produced at different pyrolysis temperatures Chemical Speciation & Bioavailability Isotherm modeling black carbon pesticide chemisorption slow pyrolysis |
author_facet |
S. S. Mayakaduwa Meththika Vithanage Anurudda Karunarathna Dinesh Mohan Yong Sik Ok |
author_sort |
S. S. Mayakaduwa |
title |
Interface interactions between insecticide carbofuran and tea waste biochars produced at different pyrolysis temperatures |
title_short |
Interface interactions between insecticide carbofuran and tea waste biochars produced at different pyrolysis temperatures |
title_full |
Interface interactions between insecticide carbofuran and tea waste biochars produced at different pyrolysis temperatures |
title_fullStr |
Interface interactions between insecticide carbofuran and tea waste biochars produced at different pyrolysis temperatures |
title_full_unstemmed |
Interface interactions between insecticide carbofuran and tea waste biochars produced at different pyrolysis temperatures |
title_sort |
interface interactions between insecticide carbofuran and tea waste biochars produced at different pyrolysis temperatures |
publisher |
Taylor & Francis Group |
series |
Chemical Speciation & Bioavailability |
issn |
0954-2299 2047-6523 |
publishDate |
2016-10-01 |
description |
Biochars showed a potential as adsorbents for organic contaminants, however, have not been tested for carbofuran, which has been detected frequently in water. This study provides evidences for the use of infused tea residue derived biochar for carbofuran removal. Biochars were produced at 300, 500 and 700 °C by slow pyrolysis and were characterized by proximate and ultimate analysis, FT-IR, SEM, BET and pore size distribution. Pyrolysis temperature showed a pronounced effect on biochar properties. The maximum carbofuran removal was achieved at pH 5. Freundlich and Temkin models best fit the equilibrium data. Biochars produced at 700 °C showed the highest sorption intensity. The adsorption process was likely to be a favorable chemisorption process with electrostatic interactions between carbofuran molecules and biochar surface. Acid-base interactions, electrophilic addition reactions and amide bond formations are the possible mechanisms of carbofuran adsorption. Overall, biochars prepared from tea waste can be utilized as effective adsorbents for removal of aqueous carbofuran. |
topic |
Isotherm modeling black carbon pesticide chemisorption slow pyrolysis |
url |
http://dx.doi.org/10.1080/09542299.2016.1198928 |
work_keys_str_mv |
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