Adsorptive Removal of Trichloroethylene in Water by Crop Residue Biochars Pyrolyzed at Contrasting Temperatures: Continuous Fixed-Bed Experiments
Biochar (BC) has attracted great attention as an alternative sorbent to activated carbon (AC). Objective of this study was to determine trichloroethylene (TCE) removal by soybean stover BC pyrolyzed at 300 (BC300) and 700°C (BC700) in continuous fixed-bed column. Columns packed with BC300, BC700, an...
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Wiley
2015-01-01
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| Series: | Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2015/647072 |
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| author | Ming Zhang Mahtab Ahmad Mohammad I. Al-Wabel Meththika Vithanage Anushka Upamali Rajapaksha Hyuck Soo Kim Sang Soo Lee Yong Sik Ok |
| author_facet | Ming Zhang Mahtab Ahmad Mohammad I. Al-Wabel Meththika Vithanage Anushka Upamali Rajapaksha Hyuck Soo Kim Sang Soo Lee Yong Sik Ok |
| author_sort | Ming Zhang |
| collection | DOAJ |
| description | Biochar (BC) has attracted great attention as an alternative sorbent to activated carbon (AC). Objective of this study was to determine trichloroethylene (TCE) removal by soybean stover BC pyrolyzed at 300 (BC300) and 700°C (BC700) in continuous fixed-bed column. Columns packed with BC300, BC700, and AC reached breakthrough time in 1.1, 27.0, and 50.7 h, respectively. BC700 had higher TCE adsorption capacity than BC300 due to its higher surface area, nonpolarity, and aromaticity. The sorption capacities of AC (774.0 mg g−1) and BC700 (515.1 mg g−1) were 21.6 and 14.4 times higher than that of BC300 (35.9 mg g−1). The lower desorption rate of TCE from BC300 than BC700 and AC may be attributed to the strong binding/partition of TCE to the noncarbonized part of BC. Thomas model also adequately described the adsorption data indicating interphase mass transfer. Overall, AC showed best efficiency for removing TCE from water in column experiments. However, although sorption and desorption capabilities of BC700 were a little lower than AC, it is still a good alternative for AC to remove organic contaminants such as TCE from water due to its cost-effectiveness. |
| format | Article |
| id | doaj-art-959ca4e63c964bcda5882cea06102ad9 |
| institution | DOAJ |
| issn | 2090-9063 2090-9071 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Chemistry |
| spelling | doaj-art-959ca4e63c964bcda5882cea06102ad92025-08-20T03:20:33ZengWileyJournal of Chemistry2090-90632090-90712015-01-01201510.1155/2015/647072647072Adsorptive Removal of Trichloroethylene in Water by Crop Residue Biochars Pyrolyzed at Contrasting Temperatures: Continuous Fixed-Bed ExperimentsMing Zhang0Mahtab Ahmad1Mohammad I. Al-Wabel2Meththika Vithanage3Anushka Upamali Rajapaksha4Hyuck Soo Kim5Sang Soo Lee6Yong Sik Ok7Department of Environmental Engineering, China Jiliang University, Hangzhou, Zhejiang 310028, ChinaSoil Sciences Department, College of Food and Agricultural Sciences, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi ArabiaSoil Sciences Department, College of Food and Agricultural Sciences, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi ArabiaChemical and Environmental Systems Modeling Research Group, Institute of Fundamental Studies, Hantana Road, 20000 Kandy, Sri LankaKorea Biochar Research Center and Department of Biological Environment, Kangwon National University, Chuncheon 200-701, Republic of KoreaDepartment of Ecology, Soil Conservation, Technische Universität Berlin, Ernst-Reuter-Platz 1, 10587 Berlin, GermanyKorea Biochar Research Center and Department of Biological Environment, Kangwon National University, Chuncheon 200-701, Republic of KoreaKorea Biochar Research Center and Department of Biological Environment, Kangwon National University, Chuncheon 200-701, Republic of KoreaBiochar (BC) has attracted great attention as an alternative sorbent to activated carbon (AC). Objective of this study was to determine trichloroethylene (TCE) removal by soybean stover BC pyrolyzed at 300 (BC300) and 700°C (BC700) in continuous fixed-bed column. Columns packed with BC300, BC700, and AC reached breakthrough time in 1.1, 27.0, and 50.7 h, respectively. BC700 had higher TCE adsorption capacity than BC300 due to its higher surface area, nonpolarity, and aromaticity. The sorption capacities of AC (774.0 mg g−1) and BC700 (515.1 mg g−1) were 21.6 and 14.4 times higher than that of BC300 (35.9 mg g−1). The lower desorption rate of TCE from BC300 than BC700 and AC may be attributed to the strong binding/partition of TCE to the noncarbonized part of BC. Thomas model also adequately described the adsorption data indicating interphase mass transfer. Overall, AC showed best efficiency for removing TCE from water in column experiments. However, although sorption and desorption capabilities of BC700 were a little lower than AC, it is still a good alternative for AC to remove organic contaminants such as TCE from water due to its cost-effectiveness.http://dx.doi.org/10.1155/2015/647072 |
| spellingShingle | Ming Zhang Mahtab Ahmad Mohammad I. Al-Wabel Meththika Vithanage Anushka Upamali Rajapaksha Hyuck Soo Kim Sang Soo Lee Yong Sik Ok Adsorptive Removal of Trichloroethylene in Water by Crop Residue Biochars Pyrolyzed at Contrasting Temperatures: Continuous Fixed-Bed Experiments Journal of Chemistry |
| title | Adsorptive Removal of Trichloroethylene in Water by Crop Residue Biochars Pyrolyzed at Contrasting Temperatures: Continuous Fixed-Bed Experiments |
| title_full | Adsorptive Removal of Trichloroethylene in Water by Crop Residue Biochars Pyrolyzed at Contrasting Temperatures: Continuous Fixed-Bed Experiments |
| title_fullStr | Adsorptive Removal of Trichloroethylene in Water by Crop Residue Biochars Pyrolyzed at Contrasting Temperatures: Continuous Fixed-Bed Experiments |
| title_full_unstemmed | Adsorptive Removal of Trichloroethylene in Water by Crop Residue Biochars Pyrolyzed at Contrasting Temperatures: Continuous Fixed-Bed Experiments |
| title_short | Adsorptive Removal of Trichloroethylene in Water by Crop Residue Biochars Pyrolyzed at Contrasting Temperatures: Continuous Fixed-Bed Experiments |
| title_sort | adsorptive removal of trichloroethylene in water by crop residue biochars pyrolyzed at contrasting temperatures continuous fixed bed experiments |
| url | http://dx.doi.org/10.1155/2015/647072 |
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