title: Removal of naphthalene from aqueous systems by poly(divinylbenzene) and poly(methyl methacrylate-divinylbenzene) resins.
abstract: Treatment of the oily wastewater from crude oil extraction is a growing challenge due to rising concern for the environment. Polyaromatic hydrocarbons (PAHs) deserve special attention because of their high toxicity. There is a need to develop processes able to minimize the discharge of these compounds and analytic techniques to monitor the levels of PAHs in aqueous media. In this study poly(methyl methacrylate-divinylbenzene) (MMA-DVB) and poly(divinylbenzene) (DVB) were assessed with respect to their capacity to retain naphthalene (NAF) in continuous flow and batch processes (adsorption equilibrium and kinetics). The analytic techniques applied were gas chromatography and spectrofluorimetry, which was adapted for quantification of NAF. The batch adsorption studies showed that DVB is more efficient in adsorption than MMA-DVB, and the Freundlich model and pseudo-second-order model better fitted the equilibrium data and adsorption kinetics, respectively. The elution results showed that both resins are highly efficient in removing NAF, with DVB outperforming MMA-DVB. However, MMA is cheaper raw material, making MMA-DVB more competitive for treatment of oily wastewater. The resins were regenerated by eluting about 7.2 and 2.5 L of methanol:water (70:30 v/v), respectively for DVB and MMA-DVB. Regarding to the useful life after regeneration, the resins presented a reduction about 30%, relating to zero concentration of NAF.
authors.affiliation: Federal University of Rio de Janeiro, Institute of Macromolecules (UFRJ/IMA), Av. Horácio Macedo, 2030, 21941598 Rio de Janeiro, Brazil.
authors.forename: Carla M F
authors.initials: CM
authors.lastname: da Silva
authors.affiliation: Federal University of Rio de Janeiro, Institute of Macromolecules (UFRJ/IMA), Av. Horácio Macedo, 2030, 21941598 Rio de Janeiro, Brazil.
authors.forename: Quéren da C
authors.initials: Qda C
authors.lastname: Rocha
authors.affiliation: Federal University of Rio de Janeiro, Institute of Macromolecules (UFRJ/IMA), Av. Horácio Macedo, 2030, 21941598 Rio de Janeiro, Brazil.
authors.forename: Paulo Cristiano S
authors.initials: PC
authors.lastname: Rocha
authors.affiliation: PETROBRAS/CENPES, Av. Horácio Macedo 950, 21941915 Rio de Janeiro, Brazil.
authors.forename: Ana Maria T
authors.initials: AM
authors.lastname: Louvisse
authors.affiliation: Federal University of Rio de Janeiro, Institute of Macromolecules (UFRJ/IMA), Av. Horácio Macedo, 2030, 21941598 Rio de Janeiro, Brazil. Electronic address: elucas@ima.ufrj.br.
authors.forename: Elizabete F
authors.initials: EF
authors.lastname: Lucas
mesh_terms: D000327:Adsorption; D006801:Humans; D007220:Industrial Waste; D008768:Methylmethacrylates; D009281:Naphthalenes / Q000737:chemistry*; D019904:Polymethyl Methacrylate / Q000737:chemistry*; D011145:Polyvinyls; D013343:Styrenes / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
chemical_list: D007220:Industrial Waste; D008768:Methylmethacrylates; D009281:Naphthalenes; D011145:Polyvinyls; D013343:Styrenes; D014874:Water Pollutants, Chemical; C031721:naphthalene; C056745:poly(divinylbenzene); D019904:Polymethyl Methacrylate; C054213:methylmethacrylate-divinylbenzene polymer
keywords: Adsorption; Naphthalene; PAHs; Polymeric resins; Produced water