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http://hdl.handle.net/20.500.12207/5704
Title: | Landfill leachate treatment by immediate one-step lime precipitation, carbonation, and phytoremediation fine-tuning |
Authors: | Ramalho, Mário Jovanović, Toni Afonso, Alexandra Baía, Ana Lopes, Ana Fernandes, Annabel Almeida, Adelaide Carvalho, Fátima |
Keywords: | Landfll leachate Lime Precipitation Carbonation Phytoremediation Vetiver (Chrysopogon zizanioides (L.) Roberty) |
Issue Date: | 20-Jan-2022 |
Publisher: | Springer |
Abstract: | The high pollutant load of sanitary landfill leachates poses a huge challenge in the search for efficient and environment friendly solutions for their treatment. The objective of this work was to study an integrated solution of environmentally friendly technologies - immediate one-step lime precipitation (IOSLP), carbonation (CB), and phytoremediation (Phyt) - to treat a sanitary landfill leachate. In the leachate sample treatment by IOSLP, the influence of CaO concentration (18.2-33.3 gCaO L-1) and stirring time (2-60 min) on the sludge sedimentability and pollutant removal was studied. Organic load and ammonia nitrogen (AN) removal increases with CaO added, as well as sludge volume. Stirring time has a small influence on organic load and AN removal, presenting a minimum for sludge volume. Thus, the best operational conditions were chosen as 27.6 gCaO L-1, and 40-min stirring time, with 64% chemical oxygen demand (COD) removal. Sludge humidity was 2.1%, making dewatering needless. IOSLP supernatant was submitted to CB by atmospheric CO2, and 100% removals in AN and hardness were attained. Effluents from IOSLP and IOSLP + CB were utilized in Phyt tests, with Vetiver (Chrysopogon zizanioides (L.) Roberty). The best COD removal (37%) during Phyt was attained for the samples treated by IOSLP + CB. |
Peer reviewed: | yes |
URI: | https://hdl.handle.net/20.500.12207/5704 |
metadata.dc.identifier.doi: | https://doi.org/10.1007/s11356-022-18729-7 |
Publisher version: | https://link.springer.com/article/10.1007/s11356-022-18729-7 |
Appears in Collections: | D-TCA - Artigos em revistas indexadas à WoS/Scopus |
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Landfill leachate treatment by immediate_PDFA.pdf | 429.38 kB | Adobe PDF | View/Open Request a copy |
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