2026-06-27T22:26:37Zhttps://docta.ucm.es/rest/oai/request
oai:docta.ucm.es:20.500.14352/67492024-07-04T09:36:30Zcom_20.500.14352_14col_20.500.14352_15
Docta Complutense author Tejera Tejo, Javier author Hermosilla Redondo, María Daphne author Gascó, Antonio author Miranda Carreño, Rubén author Alonso, Víctor author Negro Álvarez, Carlos Manuel author Blanco Suárez, María Ángeles 2023-06-17T08:21:46Z 2023-06-17T08:21:46Z 2021 1876-1070 10.1016/j.jtice.2021.02.018 https://hdl.handle.net/20.500.14352/6749 https://doi.org/10.1016/j.jtice.2021.02.018 The main objective of this study is to optimize a two-step treatment for mature landfill leachate consisting of electrocoagulation (EC) followed by Fenton or UVA-LED photo-Fenton processes aiming to provide a more efficient and feasible alternative treatment strategy that also increases biodegradability and decreases conductivity. Although 5 mA cm−2 EC is cheaper than 10 mA cm−2 EC per kg of removed COD (0.63 vs. 0.89 € kgCOD−1), it achieved the half total COD removal (13% compared to 26%), and the low residual iron concentration (100 mg L−1) that remained at the end of the process made necessary a long treatment time to perform the posterior Fenton (48 h) or UVA-LED photo-Fenton (6 h) process. When EC was performed at 10 mA cm−2, the residual iron concentration (220 mg L−1) was high enough to reduce treatment time by one half for both Fenton processes. Consequently, treatment cost decreases from 5.91 to 3.48 € kgCOD−1 for the EC + UVA-LED photo-Fenton ([H2O2]/COD = 1.063) treatment combination; whereas it slightly decreases from 1.68 to 1.61 € kgCOD−1 for the alternative EC + conventional Fenton combination. In both cases, total COD removal was around 87%. In addition, SUVA removal was >40%, conductivity was reduced about 20–30%, and biodegradability (BOD5/COD) increased over 0.3. eng Atribución 3.0 España Treatment of mature landfill leachate by electrocoagulation followed by Fenton or UVA-LED photo-Fenton processes journal article URL https://docta.ucm.es/bitstreams/a88f3b53-a7e9-461f-9ccf-55ae33c24dc3/download File MD5 37bf58eb32a4045c4d4a33b083efeeae 1646871 application/pdf Treatment_of_mature_landfill_leachate.pdf