title: An adsorbent with a high adsorption capacity obtained from the cellulose sludge of industrial residues.
abstract: One of the major problems in effluent treatment plants of the cellulose and paper industry is the large amount of residual sludge generated. Therefore, this industry is trying to develop new methods to treat such residues and to use them as new products, such as adsorbents. In this regard, the objective of this work was to develop an adsorbent using the raw activated sludge generated by the cellulose and paper industry. The activated cellulose sludge, after being dried, was chemically activated with 42.5% (v/v) phosphoric acid at 85 °C for 1 h and was charred at 500 °C, 600 °C and 700 °C for 2 h. The efficiency of the obtained adsorbent materials was evaluated using kinetic tests with methylene blue solutions. Using the adsorption kinetics, it was verified that the three adsorbents showed the capacity to adsorb dye, and the adsorbent obtained at a temperature of 600 °C showed the highest adsorption capacity of 107.1 mg g-1. The kinetic model that best fit the experimental data was pseudo-second order. The Langmuir-Freudlich isotherm adequately described the experimental data. As a result, the cellulose sludge generated by the cellulose and paper industries could be used as an adsorbent.
authors.affiliation: Area of Environment and Exact Sciences, Community University of the Chapecó Region, 89809-000 Chapecó, SC, Brazil.
authors.forename: Géssica
authors.initials: G
authors.lastname: Orlandi
authors.affiliation: Area of Environment and Exact Sciences, Community University of the Chapecó Region, 89809-000 Chapecó, SC, Brazil.
authors.forename: Jéssica
authors.initials: J
authors.lastname: Cavasotto
authors.affiliation: School of Chemical and Food Sciences, Federal University of the Rio Grande, 96203-900 Rio Grande, RS, Brazil.
authors.forename: Francisco R S
authors.initials: FR
authors.lastname: Machado
authors.affiliation: Area of Environment and Exact Sciences, Community University of the Chapecó Region, 89809-000 Chapecó, SC, Brazil.
authors.forename: Gustavo L
authors.initials: GL
authors.lastname: Colpani
authors.affiliation: Post-Graduation Program in Environment Science, Community University of the Chapecó Region, 89809-000 Chapecó, SC, Brazil.
authors.forename: Jacir Dal
authors.initials: JD
authors.lastname: Magro
authors.affiliation: Post-Graduation Program in Technology and Innovation Management, Community University of the Chapecó Region, 89809-000 Chapecó, SC, Brazil.
authors.forename: Francieli
authors.initials: F
authors.lastname: Dalcanton
authors.affiliation: Post-Graduation Program in Environment Science, Community University of the Chapecó Region, 89809-000 Chapecó, SC, Brazil; Post-Graduation Program in Technology and Innovation Management, Community University of the Chapecó Region, 89809-000 Chapecó, SC, Brazil.
authors.forename: Josiane M M
authors.initials: JM
authors.lastname: Mello
authors.affiliation: Post-Graduation Program in Environment Science, Community University of the Chapecó Region, 89809-000 Chapecó, SC, Brazil; Post-Graduation Program in Technology and Innovation Management, Community University of the Chapecó Region, 89809-000 Chapecó, SC, Brazil. Electronic address: fiori@unochapeco.edu.br.
authors.forename: Márcio A
authors.initials: MA
authors.lastname: Fiori
mesh_terms: D000327:Adsorption; D002482:Cellulose / Q000737:chemistry*; D007220:Industrial Waste; D007700:Kinetics; D008751:Methylene Blue / Q000737:chemistry; D010209:Paper; D012722:Sewage / Q000737:chemistry; D012996:Solutions; D013696:Temperature; D014865:Waste Disposal, Fluid / Q000379:methods*
chemical_list: D007220:Industrial Waste; D012722:Sewage; D012996:Solutions; D002482:Cellulose; D008751:Methylene Blue
keywords: Cellulose residues; Coal adsorbent; Coal from cellulose sludge; Coal from residues