| Title: | "Fenton treatment of sanitary landfill leachate: optimization of operational parameters, characterization of sludge and toxicology" |
| Author(s): | Dantas ERB; Silva EJ; Lopes WS; do Nascimento MR; Leite VD; de Sousa JT; |
| Address: | "Programa de Pos Graduacao em Ciencia e Tecnologia Ambiental, Departamento de Engenharia Sanitaria e Ambiental, Universidade Estadual da Paraiba, Campina Grande, Brazil. Instituto Federal de Educacao, Ciencia e Tecnologia da Paraiba, Campina Grande, Brazil" |
| DOI: | 10.1080/09593330.2019.1576773 |
| ISSN/ISBN: | 1479-487X (Electronic) 0959-3330 (Linking) |
| Abstract: | "This investigation aimed to refine the operational parameters of the Fenton process, to compare Fenton-treated and non-treated leachate with respect to physicochemical variables and toxicity towards Daphnia magna, and to characterize the sludge. The optimal conditions for the Fenton treatment involved the use of a reagent containing 12 g Fe(2+) L(-1), H(2)O(2)/Fe(2+) molar ratio of 9 and pH 2.0, with oxidation, flocculation and sedimentation times of 30, 10 and 15 min, respectively. Under these conditions, the values of the majority of parameters, including chemical oxygen demand (COD), biochemical oxygen demand, dissolved organic carbon, true color (TC), carbohydrates, proteins, phosphorus, total solids, total volatile solids, dissolved volatile solids, Kjeldahl nitrogen, N-NH(3) and iron, were reduced significantly after treatment. However, sludge production rate remained somewhat high (98 kg m(-3) of treated leachate), although the specific resistance to filtration of the sludge was moderate (12 x 10(9) cm g(-1)). While the Fenton process achieved a satisfactory removal of COD (87%) and TC (91%), the treated leachate contained organic compounds that were resistant to oxidation and remained toxic towards D. magna. Hence we conclude that the Fenton process alone is not appropriate for treatment of leachate, because it could negatively affect the ecosystem in receiving water bodies, but it could represent a viable alternative for the pretreatment of landfill leachate" |
| Keywords: | "Biological Oxygen Demand Analysis Ecosystem Hydrogen Peroxide Oxidation-Reduction Sewage Water Pollutants, Chemical/*analysis Daphnia magna Solid waste advanced processes oxidative ecotoxicity ferric sludge;" |
| Notes: | "MedlineDantas, Edilma R B Silva, Edlamara J Lopes, Wilton S do Nascimento, Marcelo R Leite, Valderi D de Sousa, Jose T eng England 2019/01/31 Environ Technol. 2020 Aug; 41(20):2637-2647. doi: 10.1080/09593330.2019.1576773. Epub 2019 Feb 27" |
