title: Synthetic polymers blend used in the production of high activated carbon for pesticides removals from liquid phase.
abstract: For the activated carbon (AC) production, we used the most common industrial and consumer solid waste, namely polyethyleneterephthalate (PET), alone or blended with other synthetic polymer such polyacrylonitrile (PAN). By mixing PET, with PAN, an improvement in the yield of the AC production was found and the basic character and some textural and chemical properties were enhanced. The PET-PAN mixture was subjected to carbonisation, with a pyrolysis yield of 31.9%, between that obtained with PET (16.9%) or PAN (42.6%) separately. The AC revealed a high surface area (1400, 1230 and 1117 m2g-1) and pore volume (0.46, 0.56 and 0.50 cm3g-1), respectively, for PET, PAN and PET-PAN precursors. Selected ACs were successfully tested for 4-chloro-2-methylphenoxyacetic acid (MCPA) and diuron removal from the liquid phase, showing a higher adsorption capacity (1.7 and 1.2 mmol g-1, respectively, for MCPA and diuron) and good fits with the Langmuir (PET) and Freundlich equation (PAN and PET-PAN blend). With MCPA, the controlling factor to the adsorption capacity was the porous volume and the average pore size. Concerning diuron, the adsorption was controlled essentially by the external diffusion. A remarkable result is the use of different synthetic polymers wastes, as precursors for the production of carbon materials, with high potential application on the pesticides removals from the liquid phase.
authors.affiliation: a Faculdade de Educação, Artes e Humanidades, Departamento do Ensino de Química , Universidade Nacional Timor Lorosa'e , Rua Jacinto Cândido , Díli , Timor Leste.|b Centro de Química de Évora and Departamento de Química , Instituto de Investigação e Formação Avançada and Escola de Ciências e Tecnologia, Universidade de Évora - Rua Romão Ramalho n°59 , Évora , Portugal.
authors.forename: Cristóvão Ramiro
authors.initials: CR
authors.lastname: Belo
authors.affiliation: b Centro de Química de Évora and Departamento de Química , Instituto de Investigação e Formação Avançada and Escola de Ciências e Tecnologia, Universidade de Évora - Rua Romão Ramalho n°59 , Évora , Portugal.
authors.forename: Isabel Pestana da Paixão
authors.initials: IP
authors.lastname: Cansado
authors.affiliation: b Centro de Química de Évora and Departamento de Química , Instituto de Investigação e Formação Avançada and Escola de Ciências e Tecnologia, Universidade de Évora - Rua Romão Ramalho n°59 , Évora , Portugal.
authors.forename: Paulo Alexandre Mira
authors.initials: PA
authors.lastname: Mourão
mesh_terms: D008456:2-Methyl-4-chlorophenoxyacetic Acid / Q000737:chemistry; D000180:Acrylic Resins / Q000737:chemistry*; D000327:Adsorption; D002244:Carbon / Q000737:chemistry*; D004237:Diuron / Q000737:chemistry; D010575:Pesticides / Q000737:chemistry*; D011093:Polyethylene Terephthalates / Q000737:chemistry*; D016062:Porosity; D014866:Waste Products; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods
chemical_list: D000180:Acrylic Resins; D010575:Pesticides; D011093:Polyethylene Terephthalates; D014866:Waste Products; D014874:Water Pollutants, Chemical; C010504:polyacrylonitrile; D002244:Carbon; D004237:Diuron; D008456:2-Methyl-4-chlorophenoxyacetic Acid
keywords: MCPA; PAN; PET; Polymer blend; diuron