Effect of deashing on physico-chemical properties of wheat and rice straw biochars and potential sorption of pyrazosulfuron-ethyl
Wheat (WBC) and rice straw biochars (RBC) prepared at 400 and 600 °C and their deashed counterparts were characterized for their physico-chemical properties using CHN analysis, Brunauer–Emmett–Teller (BET), X-ray fluorescence (XRF), scanning electron microscopy (SEM), 13C-nuclear magnetic resonance...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2020-01-01
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| Series: | Arabian Journal of Chemistry |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1878535217301910 |
| _version_ | 1828776403636584448 |
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| author | Suman Manna Neera Singh T.J. Purakayastha Anne E. Berns |
| author_facet | Suman Manna Neera Singh T.J. Purakayastha Anne E. Berns |
| author_sort | Suman Manna |
| collection | DOAJ |
| description | Wheat (WBC) and rice straw biochars (RBC) prepared at 400 and 600 °C and their deashed counterparts were characterized for their physico-chemical properties using CHN analysis, Brunauer–Emmett–Teller (BET), X-ray fluorescence (XRF), scanning electron microscopy (SEM), 13C-nuclear magnetic resonance (NMR), X-ray diffraction (XRD) and Fourier transform infrared (FT-IR) techniques. Pyrazosulfuron-ethyl sorption data on normal and deashed biochars could be well fitted to the Freundlich model. The characteristics of biochars and their adsorption capacities for pyrazosulfuron-ethyl were affected by the pyrolysis temperature and nature of feedstock. Rice biochars had higher sorption capacities than the wheat biochars. Deashing of biochars further enhanced their herbicide adsorption potential by a factor of 2–3. Sorption of herbicide on both normal and deashed biochars was concentration dependent (1/n < 1) and decreased with increase in the herbicide concentration in solution, indicating a saturation of sorption sites. The non-linearity of the isotherms increased with increasing pyrolysis temperature and deashing. Furthermore, adsorption of pyrazosulfuron-ethyl was affected by the pH, surface area and pore volume of biochars. Results of this study suggested that the mineral fraction of biochars significantly affected pyrazosulfuron-ethyl sorption. Keywords: Pyrazosulfuron-ethyl, Biochars, Deashing, Pyrolysis, Sorption |
| first_indexed | 2024-12-11T15:57:47Z |
| format | Article |
| id | doaj.art-b1988a88d1e242f196537af463a4c0c8 |
| institution | Directory Open Access Journal |
| issn | 1878-5352 |
| language | English |
| last_indexed | 2024-12-11T15:57:47Z |
| publishDate | 2020-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Arabian Journal of Chemistry |
| spelling | doaj.art-b1988a88d1e242f196537af463a4c0c82022-12-22T00:59:22ZengElsevierArabian Journal of Chemistry1878-53522020-01-0113112471258Effect of deashing on physico-chemical properties of wheat and rice straw biochars and potential sorption of pyrazosulfuron-ethylSuman Manna0Neera Singh1T.J. Purakayastha2Anne E. Berns3Division of Agricultural Chemicals, ICAR-Indian Agricultural Research Institute, New Delhi 110012, IndiaDivision of Agricultural Chemicals, ICAR-Indian Agricultural Research Institute, New Delhi 110012, India; Corresponding author.Division of Soil Science and Agricultural Chemistry, ICAR-Indian Agricultural Research Institute, New Delhi 110012, IndiaForschungszentrum Juelich GmbH, Institute of Bio- and Geosciences-Agrosphere (IBG-3), 52425 Juelich, GermanyWheat (WBC) and rice straw biochars (RBC) prepared at 400 and 600 °C and their deashed counterparts were characterized for their physico-chemical properties using CHN analysis, Brunauer–Emmett–Teller (BET), X-ray fluorescence (XRF), scanning electron microscopy (SEM), 13C-nuclear magnetic resonance (NMR), X-ray diffraction (XRD) and Fourier transform infrared (FT-IR) techniques. Pyrazosulfuron-ethyl sorption data on normal and deashed biochars could be well fitted to the Freundlich model. The characteristics of biochars and their adsorption capacities for pyrazosulfuron-ethyl were affected by the pyrolysis temperature and nature of feedstock. Rice biochars had higher sorption capacities than the wheat biochars. Deashing of biochars further enhanced their herbicide adsorption potential by a factor of 2–3. Sorption of herbicide on both normal and deashed biochars was concentration dependent (1/n < 1) and decreased with increase in the herbicide concentration in solution, indicating a saturation of sorption sites. The non-linearity of the isotherms increased with increasing pyrolysis temperature and deashing. Furthermore, adsorption of pyrazosulfuron-ethyl was affected by the pH, surface area and pore volume of biochars. Results of this study suggested that the mineral fraction of biochars significantly affected pyrazosulfuron-ethyl sorption. Keywords: Pyrazosulfuron-ethyl, Biochars, Deashing, Pyrolysis, Sorptionhttp://www.sciencedirect.com/science/article/pii/S1878535217301910 |
| spellingShingle | Suman Manna Neera Singh T.J. Purakayastha Anne E. Berns Effect of deashing on physico-chemical properties of wheat and rice straw biochars and potential sorption of pyrazosulfuron-ethyl Arabian Journal of Chemistry |
| title | Effect of deashing on physico-chemical properties of wheat and rice straw biochars and potential sorption of pyrazosulfuron-ethyl |
| title_full | Effect of deashing on physico-chemical properties of wheat and rice straw biochars and potential sorption of pyrazosulfuron-ethyl |
| title_fullStr | Effect of deashing on physico-chemical properties of wheat and rice straw biochars and potential sorption of pyrazosulfuron-ethyl |
| title_full_unstemmed | Effect of deashing on physico-chemical properties of wheat and rice straw biochars and potential sorption of pyrazosulfuron-ethyl |
| title_short | Effect of deashing on physico-chemical properties of wheat and rice straw biochars and potential sorption of pyrazosulfuron-ethyl |
| title_sort | effect of deashing on physico chemical properties of wheat and rice straw biochars and potential sorption of pyrazosulfuron ethyl |
| url | http://www.sciencedirect.com/science/article/pii/S1878535217301910 |
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