Monitoring transitory profiles of leachate humic substances in landfill aeration reactors in mesophilic and thermophilic conditions
The presence of humic substances (HS) in landfill leachate is of great interest because of their structural stability and potential toxicity. This study examined the effects of temperature and waste age on the transformation of HS during in situ aeration of bioreactor landfills. By establishing aero...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
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2015
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| Online Access: | https://hdl.handle.net/10356/106145 http://hdl.handle.net/10220/26352 |
| _version_ | 1824454925659144192 |
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| author | Tong, Huanhuan Yin, Ke Ge, Liya Giannis, Apostolos Wang, Jing-Yuan Chuan, Valerie W.L. |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Tong, Huanhuan Yin, Ke Ge, Liya Giannis, Apostolos Wang, Jing-Yuan Chuan, Valerie W.L. |
| author_sort | Tong, Huanhuan |
| collection | NTU |
| description | The presence of humic substances (HS) in landfill leachate is of great interest because of their structural stability and potential toxicity. This study examined the effects of temperature and waste age on the transformation of HS during in situ aeration of bioreactor landfills. By establishing aerobic conditions, dissolved organic carbon (DOC) rapidly accumulated in the bioreactor leachate. Fractional analysis showed that the elevated concentration of humic acids (HAs) was primarily responsible for the increment of leachate strength. Further structural characterization indicated that the molecular weight (MW) and aromacity of HS were enhanced by aeration in conjunction with thermophilic temperature. Interestingly, elevation of HAs concentration was not observed in the aeration reactor with a prolonged waste age, as the mobility of HAs was lowered by the high MW derived from extended waste age. Based on these results, aeration may be more favorable in aged landfills, since dissolution of HAs could be minimized by the evolution to larger MW compared to young landfills. Moreover, increased operation temperature during aeration likely offers benefits for the rapid maturation of HS. |
| first_indexed | 2025-02-19T03:30:04Z |
| format | Journal Article |
| id | ntu-10356/106145 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T03:30:04Z |
| publishDate | 2015 |
| record_format | dspace |
| spelling | ntu-10356/1061452020-09-26T22:03:11Z Monitoring transitory profiles of leachate humic substances in landfill aeration reactors in mesophilic and thermophilic conditions Tong, Huanhuan Yin, Ke Ge, Liya Giannis, Apostolos Wang, Jing-Yuan Chuan, Valerie W.L. School of Civil and Environmental Engineering Residues and Resource Reclamation Centre Nanyang Environment and Water Research Institute DRNTU::Engineering::Environmental engineering::Waste management The presence of humic substances (HS) in landfill leachate is of great interest because of their structural stability and potential toxicity. This study examined the effects of temperature and waste age on the transformation of HS during in situ aeration of bioreactor landfills. By establishing aerobic conditions, dissolved organic carbon (DOC) rapidly accumulated in the bioreactor leachate. Fractional analysis showed that the elevated concentration of humic acids (HAs) was primarily responsible for the increment of leachate strength. Further structural characterization indicated that the molecular weight (MW) and aromacity of HS were enhanced by aeration in conjunction with thermophilic temperature. Interestingly, elevation of HAs concentration was not observed in the aeration reactor with a prolonged waste age, as the mobility of HAs was lowered by the high MW derived from extended waste age. Based on these results, aeration may be more favorable in aged landfills, since dissolution of HAs could be minimized by the evolution to larger MW compared to young landfills. Moreover, increased operation temperature during aeration likely offers benefits for the rapid maturation of HS. Accepted version 2015-07-08T11:59:38Z 2019-12-06T22:05:25Z 2015-07-08T11:59:38Z 2019-12-06T22:05:25Z 2015 2015 Journal Article Tong, H., Yin, K., Ge, L., Giannis, A., Chuan, V. W., & Wang, J. Y. (2015). Monitoring transitory profiles of leachate humic substances in landfill aeration reactors in mesophilic and thermophilic conditions. Journal of hazardous materials, 287, 342-348. 0304-3894 https://hdl.handle.net/10356/106145 http://hdl.handle.net/10220/26352 10.1016/j.jhazmat.2015.01.049 191141 en Journal of hazardous materials © 2015 Elsevier. This is the author created version of a work that has been peer reviewed and accepted for publication by Journal of Hazardous Materials, Elsevier. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1016/j.jhazmat.2015.01.049 ]. 32 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Environmental engineering::Waste management Tong, Huanhuan Yin, Ke Ge, Liya Giannis, Apostolos Wang, Jing-Yuan Chuan, Valerie W.L. Monitoring transitory profiles of leachate humic substances in landfill aeration reactors in mesophilic and thermophilic conditions |
| title | Monitoring transitory profiles of leachate humic substances in landfill aeration reactors in mesophilic and thermophilic conditions |
| title_full | Monitoring transitory profiles of leachate humic substances in landfill aeration reactors in mesophilic and thermophilic conditions |
| title_fullStr | Monitoring transitory profiles of leachate humic substances in landfill aeration reactors in mesophilic and thermophilic conditions |
| title_full_unstemmed | Monitoring transitory profiles of leachate humic substances in landfill aeration reactors in mesophilic and thermophilic conditions |
| title_short | Monitoring transitory profiles of leachate humic substances in landfill aeration reactors in mesophilic and thermophilic conditions |
| title_sort | monitoring transitory profiles of leachate humic substances in landfill aeration reactors in mesophilic and thermophilic conditions |
| topic | DRNTU::Engineering::Environmental engineering::Waste management |
| url | https://hdl.handle.net/10356/106145 http://hdl.handle.net/10220/26352 |
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