Molecular-level investigation on removal mechanisms of aqueous hexavalent chromium by pine needle biochar
Pine needle biochar produced via oxygen-limited pyrolysis at 800 °C for 2 h was used for removing aqueous hexavalent chromium [Cr(VI)] from water. The optimality of the pseudo-second order kinetic model indicated the chemisorption dominated the removal process. Strong acid environment (pH = 2.0) was...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-08-01
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| Series: | Arabian Journal of Chemistry |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1878535223004288 |
| _version_ | 1827925787013021696 |
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| author | Yuting Zhang Na Liu Peng Liu YingYing Liu Yutao Lei |
| author_facet | Yuting Zhang Na Liu Peng Liu YingYing Liu Yutao Lei |
| author_sort | Yuting Zhang |
| collection | DOAJ |
| description | Pine needle biochar produced via oxygen-limited pyrolysis at 800 °C for 2 h was used for removing aqueous hexavalent chromium [Cr(VI)] from water. The optimality of the pseudo-second order kinetic model indicated the chemisorption dominated the removal process. Strong acid environment (pH = 2.0) was more conductive to Cr(VI) removal. The functional groups (C–O, O–C–O, C = O) on biochar contributed to Cr(VI) elimination from aqueous solution. The governing removal mechanisms involved electrostatic attraction, reduction, and complexation. Especially, confocal micro-X-ray fluorescence (μ-XRF) mapping indicated that Cr ions and functional groups were primarily distributed on the surface of biochar. This study firstly provided a deep interpretation of Cr speciation and spatial distribution on pine needle biochar, which provided important information on removal mechanisms of Cr(VI) by pine needle biochar. |
| first_indexed | 2024-03-13T05:29:09Z |
| format | Article |
| id | doaj.art-251c56ad4d18459389eb39dc3904b037 |
| institution | Directory Open Access Journal |
| issn | 1878-5352 |
| language | English |
| last_indexed | 2024-03-13T05:29:09Z |
| publishDate | 2023-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Arabian Journal of Chemistry |
| spelling | doaj.art-251c56ad4d18459389eb39dc3904b0372023-06-15T04:55:06ZengElsevierArabian Journal of Chemistry1878-53522023-08-01168104966Molecular-level investigation on removal mechanisms of aqueous hexavalent chromium by pine needle biocharYuting Zhang0Na Liu1Peng Liu2YingYing Liu3Yutao Lei4Key Laboratory of Songliao Aquatic Environment, Ministry of Education, Jilin Jianzhu University, Changchun 130118, ChinaInstitute of Groundwater and Earth Science, Jinan University, Guangzhou 510632, ChinaSchool of Environmental Studies, China University of Geosciences, 388 Lumo Rd., Wuhan 430074, ChinaKey Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China; College of New Energy and Environment, Jilin University, Changchun 130021, China; Corresponding authors at: Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China (YingYing Liu).South China Institute of Environmental Sciences, MEP, 510530, China; Corresponding authors at: Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China (YingYing Liu).Pine needle biochar produced via oxygen-limited pyrolysis at 800 °C for 2 h was used for removing aqueous hexavalent chromium [Cr(VI)] from water. The optimality of the pseudo-second order kinetic model indicated the chemisorption dominated the removal process. Strong acid environment (pH = 2.0) was more conductive to Cr(VI) removal. The functional groups (C–O, O–C–O, C = O) on biochar contributed to Cr(VI) elimination from aqueous solution. The governing removal mechanisms involved electrostatic attraction, reduction, and complexation. Especially, confocal micro-X-ray fluorescence (μ-XRF) mapping indicated that Cr ions and functional groups were primarily distributed on the surface of biochar. This study firstly provided a deep interpretation of Cr speciation and spatial distribution on pine needle biochar, which provided important information on removal mechanisms of Cr(VI) by pine needle biochar.http://www.sciencedirect.com/science/article/pii/S1878535223004288Cr(VI)BiocharConfocal micro-X-ray fluorescence mappingX-ray absorption near-edge structureRemoval mechanisms |
| spellingShingle | Yuting Zhang Na Liu Peng Liu YingYing Liu Yutao Lei Molecular-level investigation on removal mechanisms of aqueous hexavalent chromium by pine needle biochar Arabian Journal of Chemistry Cr(VI) Biochar Confocal micro-X-ray fluorescence mapping X-ray absorption near-edge structure Removal mechanisms |
| title | Molecular-level investigation on removal mechanisms of aqueous hexavalent chromium by pine needle biochar |
| title_full | Molecular-level investigation on removal mechanisms of aqueous hexavalent chromium by pine needle biochar |
| title_fullStr | Molecular-level investigation on removal mechanisms of aqueous hexavalent chromium by pine needle biochar |
| title_full_unstemmed | Molecular-level investigation on removal mechanisms of aqueous hexavalent chromium by pine needle biochar |
| title_short | Molecular-level investigation on removal mechanisms of aqueous hexavalent chromium by pine needle biochar |
| title_sort | molecular level investigation on removal mechanisms of aqueous hexavalent chromium by pine needle biochar |
| topic | Cr(VI) Biochar Confocal micro-X-ray fluorescence mapping X-ray absorption near-edge structure Removal mechanisms |
| url | http://www.sciencedirect.com/science/article/pii/S1878535223004288 |
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