title: Removal of ammonia nitrogen from distilled old landfill leachate by adsorption on raw and modified aluminosilicate.
abstract: This study aimed to evaluate the ammonia-nitrogen removal by aluminosilicates, using both standard solutions as pretreated landfill leachate. Three types of commercial clays and one commercial zeolite were initially tested using standard solution; however, only one clay with the best removability and the zeolite were tested with pretreated leachate. The chosen clay sorption capacity with the standard solution reached 83%, while with the pretreated leachate solution has reached 95% and zeolites have reached, respectively, a removal of 73% and 81%. For this two adsorbents' studies of equilibrium and kinetic of the sorption were also performed. The Langmuir model was more adequate to describe the ion exchange equilibrium and the sorption mechanism fit the pseudo-second-order kinetic model. Moreover, the pretreatment used on leachate proved to be essential not only for ammonium detection in solution, but also to facilitate its sorption in aluminosilicates. This alternative of ammonia-nitrogen removal also generates a product derived from treatment that can be used as agricultural feedstock in the form of fertilizer.
authors.affiliation: a Environmental Technology Laboratory , State University of Rio de Janeiro , Rio de Janeiro , Brazil.
authors.forename: Rafael Schirmer de Paula
authors.initials: RS
authors.lastname: Couto
authors.affiliation: a Environmental Technology Laboratory , State University of Rio de Janeiro , Rio de Janeiro , Brazil.
authors.forename: Aline Faria
authors.initials: AF
authors.lastname: Oliveira
authors.affiliation: b Laboratório de Análises Ambientais, Instituto de Biologia , Universidade Federal do Estado do Rio de Janeiro , Brazil.
authors.forename: Alcides Wagner Serpa
authors.initials: AW
authors.lastname: Guarino
authors.affiliation: c Brazilian Agricultural Research Corporation; Ministry of Agriculture, Livestock and Supply of Brazil , Rio de Janeiro , Brazil.
authors.forename: Daniel Vidal
authors.initials: DV
authors.lastname: Perez
authors.affiliation: a Environmental Technology Laboratory , State University of Rio de Janeiro , Rio de Janeiro , Brazil.
authors.forename: Mônica Regina da Costa
authors.initials: MR
authors.lastname: Marques
mesh_terms: D000327:Adsorption; D000538:Aluminum Silicates / Q000737:chemistry*; D000641:Ammonia / Q000737:chemistry*; D007700:Kinetics; D009584:Nitrogen / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D017641:Zeolites / Q000737:chemistry
chemical_list: D000538:Aluminum Silicates; D014874:Water Pollutants, Chemical; D017641:Zeolites; C049037:aluminosilicate; D000641:Ammonia; D009584:Nitrogen
keywords: Adsorbents; aluminosilicates; ammonia–nitrogen; ion chromatography; landfill leachate