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Improved landfill leachate quality using ozone, UV solar radiation, hydrogen peroxide, persulfate and adsorption processes.
Poblete, Rodrigo; Oller, Isabel; Maldonado, Manuel I; Cortes, Ernesto.
Afiliação
  • Poblete R; Universidad Católica del Norte, Facultad de Ciencias del Mar, Escuela de Prevención de Riesgos y Medioambiente, 1780000 Coquimbo, Chile. Electronic address: rpobletech@ucn.cl.
  • Oller I; Plataforma Solar de Almería (CIEMAT), 04200, Tabernas, Almería, Spain; CIESOL, Joint Centre University of Almería-CIEMAT, 04120, Almería, Spain.
  • Maldonado MI; Plataforma Solar de Almería (CIEMAT), 04200, Tabernas, Almería, Spain; CIESOL, Joint Centre University of Almería-CIEMAT, 04120, Almería, Spain.
  • Cortes E; Universidad Católica del Norte, Facultad de Ciencias del Mar, Escuela de Prevención de Riesgos y Medioambiente, 1780000 Coquimbo, Chile.
J Environ Manage ; 232: 45-51, 2019 Feb 15.
Article em En | MEDLINE | ID: mdl-30468956
Advanced oxidation processes based on ozonation, UV solar radiation, hydrogen peroxide, and persulfate were tested for the complete treatment of a specific landfill leachate. As a post-treatment of the advanced oxidation process, an additional adsorption process was carried out using a natural zeolite. Application of the UVsolar/O3/H2O2 process required 140 min of irradiation and the consumption of 0.67 g/L H2O2 to eliminate 56% and 17% of colour and chemical oxygen demand (COD), respectively. When adding persulfate to the system (UVsolar/O3/H2O2/S2O8-2), colour and COD were reduced by 29% and 77%, respectively, with a 0.2 g/L concentration of S2O8-2 requiring 250 min of irradiation time. In an experimental run with landfill leachate, adsorption post-treatment with a natural zeolite resulted in 36%, 99%, and 18% total reductions in COD, ammonium, and chloride, respectively. In another experimental run, adsorption with a zeolite was used as a pre-treatment for the advanced oxidation process (UVsolar/O3/H2O2 and UVsolar/O3/H2O2/S2O8-2). The results were similar to those for adsorption post-treatment, with 30%, 90%, and 20% total reductions in COD, ammonium, and chloride, respectively. Despite improvements, some measured parameters of treated landfill leachate still exceeded Chilean regulations for water quality. Furthermore, Lactuca sativa seeds did not germinate after irrigation with 100% treated landfill leachate or dilutions above 3%. Finally, EC50 values were enhanced during treatment, going from 0.002% for raw landfill leachate to 1.179% after the adsorption process.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Ozônio / Poluentes Químicos da Água País/Região como assunto: America do sul / Chile Idioma: En Revista: J Environ Manage Ano de publicação: 2019 Tipo de documento: Article País de publicação: Reino Unido
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Ozônio / Poluentes Químicos da Água País/Região como assunto: America do sul / Chile Idioma: En Revista: J Environ Manage Ano de publicação: 2019 Tipo de documento: Article País de publicação: Reino Unido