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Enhanced removal of refractory humic- and fulvic-like organics from biotreated landfill leachate by ozonation in packed bubble columns

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Abstract
Biotreated landfill leachate contains much refractory organics such as humic and fulvic acids, which can be de -graded by O-3. However, the low O-3 mass transfer and high energy cost limit its wide application in landfill leachate treatment. Previous studies proved that packed bubble columns could enhance the O-3 mass transfer and increase the synthetic humic acids wastewater degradation, but the performance of packed bubble columns in real wastewater treatment has not been investigated. Therefore, this study aims to evaluate the feasibility of application of packed bubble column in the real biotreated landfill leachates treatment and provide insights into the transformation of organic matters in leachates during ozonation. Packed bubble columns with lava rocks or metal pall rings (LBC or MBC) were applied and compared with a non-packed bubble column (BC). At an applied O3 dose of 8.35 mg/(L-water sample min), the initial COD (400 mg/L) was only removed for 26% in BC and 32% in MBC while this was 46% in LBC, indicating LBC has the best performance. GC-MS analysis shows that raw biotreated leachate contains potential endocrine disruptors such as di(2-ethylhexyl) phthalate (DEHP). 61% of DEHP was removed in LBC and the least intermediate oxidation products from humic-and fulvic-like organics was detected in LBC. The highest O-3 utilization efficiency (89%) and hydroxyl radical (center dot OH) exposure rate (3.0 x 10(-10) M s) were observed in LBC with lowest energy consumption (E-EO) for COD removal of 18 kWh/m(3). The enhanced ozonation efficiency in LBC and MBC was attributed to the improved O-3 mass transfer. Besides, LBC had additional adsorptive and catalytic activity that promoted the decomposition of O-3 to generate center dot OH. This study demonstrates that a packed bubble column increases removal and decreases energy use when treating landfill leachate, thus promoting the application of ozonation. (C) 2021 Elsevier B.V. All rights reserved.
Keywords
Pollution, Waste Management and Disposal, Environmental Chemistry, Environmental Engineering, Biotreated landfill leachate, Humic and fulvic acids, O-3, Packed bubble columns, Lava rocks, AUTOTROPHIC NITROGEN REMOVAL, ACTIVATED CARBON ADSORPTION, ADVANCED OXIDATION, WASTE-WATER, COAGULATION-FLOCCULATION, BIOLOGICAL PROCESSES, CATALYTIC OZONATION, HYDROXYL RADICALS, DRINKING-WATER, MASS-TRANSFER

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MLA
Yang, Xuetong, et al. “Enhanced Removal of Refractory Humic- and Fulvic-like Organics from Biotreated Landfill Leachate by Ozonation in Packed Bubble Columns.” SCIENCE OF THE TOTAL ENVIRONMENT, vol. 807, no. Part 1, 2022, doi:10.1016/j.scitotenv.2021.150762.
APA
Yang, X., De Buyck, P.-J., Zhang, R., Manhaeghe, D., Wang, H., Chen, L., … Van Hulle, S. (2022). Enhanced removal of refractory humic- and fulvic-like organics from biotreated landfill leachate by ozonation in packed bubble columns. SCIENCE OF THE TOTAL ENVIRONMENT, 807(Part 1). https://doi.org/10.1016/j.scitotenv.2021.150762
Chicago author-date
Yang, Xuetong, Pieter-Jan De Buyck, Rui Zhang, Dave Manhaeghe, Hao Wang, Licai Chen, Yunliang Zhao, Kristof Demeestere, and Stijn Van Hulle. 2022. “Enhanced Removal of Refractory Humic- and Fulvic-like Organics from Biotreated Landfill Leachate by Ozonation in Packed Bubble Columns.” SCIENCE OF THE TOTAL ENVIRONMENT 807 (Part 1). https://doi.org/10.1016/j.scitotenv.2021.150762.
Chicago author-date (all authors)
Yang, Xuetong, Pieter-Jan De Buyck, Rui Zhang, Dave Manhaeghe, Hao Wang, Licai Chen, Yunliang Zhao, Kristof Demeestere, and Stijn Van Hulle. 2022. “Enhanced Removal of Refractory Humic- and Fulvic-like Organics from Biotreated Landfill Leachate by Ozonation in Packed Bubble Columns.” SCIENCE OF THE TOTAL ENVIRONMENT 807 (Part 1). doi:10.1016/j.scitotenv.2021.150762.
Vancouver
1.
Yang X, De Buyck P-J, Zhang R, Manhaeghe D, Wang H, Chen L, et al. Enhanced removal of refractory humic- and fulvic-like organics from biotreated landfill leachate by ozonation in packed bubble columns. SCIENCE OF THE TOTAL ENVIRONMENT. 2022;807(Part 1).
IEEE
[1]
X. Yang et al., “Enhanced removal of refractory humic- and fulvic-like organics from biotreated landfill leachate by ozonation in packed bubble columns,” SCIENCE OF THE TOTAL ENVIRONMENT, vol. 807, no. Part 1, 2022.
@article{8722644,
  abstract     = {{Biotreated landfill leachate contains much refractory organics such as humic and fulvic acids, which can be de -graded by O-3. However, the low O-3 mass transfer and high energy cost limit its wide application in landfill leachate treatment. Previous studies proved that packed bubble columns could enhance the O-3 mass transfer and increase the synthetic humic acids wastewater degradation, but the performance of packed bubble columns in real wastewater treatment has not been investigated. Therefore, this study aims to evaluate the feasibility of application of packed bubble column in the real biotreated landfill leachates treatment and provide insights into the transformation of organic matters in leachates during ozonation. Packed bubble columns with lava rocks or metal pall rings (LBC or MBC) were applied and compared with a non-packed bubble column (BC). At an applied O3 dose of 8.35 mg/(L-water sample min), the initial COD (400 mg/L) was only removed for 26% in BC and 32% in MBC while this was 46% in LBC, indicating LBC has the best performance. GC-MS analysis shows that raw biotreated leachate contains potential endocrine disruptors such as di(2-ethylhexyl) phthalate (DEHP). 61% of DEHP was removed in LBC and the least intermediate oxidation products from humic-and fulvic-like organics was detected in LBC. The highest O-3 utilization efficiency (89%) and hydroxyl radical (center dot OH) exposure rate (3.0 x 10(-10) M s) were observed in LBC with lowest energy consumption (E-EO) for COD removal of 18 kWh/m(3). The enhanced ozonation efficiency in LBC and MBC was attributed to the improved O-3 mass transfer. Besides, LBC had additional adsorptive and catalytic activity that promoted the decomposition of O-3 to generate center dot OH. This study demonstrates that a packed bubble column increases removal and decreases energy use when treating landfill leachate, thus promoting the application of ozonation. (C) 2021 Elsevier B.V. All rights reserved.}},
  articleno    = {{150762}},
  author       = {{Yang, Xuetong and De Buyck, Pieter-Jan and Zhang, Rui and Manhaeghe, Dave and Wang, Hao and Chen, Licai and Zhao, Yunliang and Demeestere, Kristof and Van Hulle, Stijn}},
  issn         = {{0048-9697}},
  journal      = {{SCIENCE OF THE TOTAL ENVIRONMENT}},
  keywords     = {{Pollution,Waste Management and Disposal,Environmental Chemistry,Environmental Engineering,Biotreated landfill leachate,Humic and fulvic acids,O-3,Packed bubble columns,Lava rocks,AUTOTROPHIC NITROGEN REMOVAL,ACTIVATED CARBON ADSORPTION,ADVANCED OXIDATION,WASTE-WATER,COAGULATION-FLOCCULATION,BIOLOGICAL PROCESSES,CATALYTIC OZONATION,HYDROXYL RADICALS,DRINKING-WATER,MASS-TRANSFER}},
  language     = {{eng}},
  number       = {{Part 1}},
  pages        = {{11}},
  title        = {{Enhanced removal of refractory humic- and fulvic-like organics from biotreated landfill leachate by ozonation in packed bubble columns}},
  url          = {{http://dx.doi.org/10.1016/j.scitotenv.2021.150762}},
  volume       = {{807}},
  year         = {{2022}},
}

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