title: Removal of methylparaben from synthetic aqueous solutions using polyacrylonitrile beads: kinetic and equilibrium studies.
abstract: The removal of methylparaben (MP), a well-known endocrine disruptor, from aqueous solutions using polyacrylonitrile (PAN) beads has been studied under batch conditions, at room temperature and at different initial MP concentrations. The kinetic and equilibrium results have been analyzed. Kinetic modeling analysis has been carried out with three different types of adsorption models: pseudo-first-order, pseudo-second-order, and Elovich model. Kinetic data analysis indicated that the adsorption was a second-order process. The MP adsorption by PAN was also quantitatively evaluated by using the equilibrium adsorption isotherm models of Langmuir, Freundlich, Dubinin-Radushkevich (D-R), and Temkin and the applicability of the respective isotherm equations has been compared through the correlation coefficients. Adsorption data resulted well fitted by the Freundlich isotherm model. Data of MP adsorption have also been used to test different adsorption diffusion models. The diffusion rate equations inside particulate of Dumwald-Wagner and the intraparticle diffusion model have been used to calculate the diffusion rate. The actual rate-controlling step involved in the MB adsorption process was determined. The kinetic expression by Boyd gave the right indications. All together, our results indicate that PAN beads are a useful tool to remediate water bodies polluted by endocrine disruptors.
authors: Institute of Genetics and Biophysics of CNR, Via Pietro Castellino 111, 80131, Naples, Italy.|National Laboratory on Endocrine Disruptors of INBB, Naples, Italy.
authors: Maurizio
authors: M
authors: Forte
authors: Institute of Genetics and Biophysics of CNR, Via Pietro Castellino 111, 80131, Naples, Italy.|National Laboratory on Endocrine Disruptors of INBB, Naples, Italy.
authors: Luigi
authors: L
authors: Mita
authors: National Laboratory on Endocrine Disruptors of INBB, Naples, Italy.|Department of Biology, University Federico II, Naples, Italy.
authors: Rosa
authors: R
authors: Perrone
authors: National Laboratory on Endocrine Disruptors of INBB, Naples, Italy.
authors: Sergio
authors: S
authors: Rossi
authors: Institute of Genetics and Biophysics of CNR, Via Pietro Castellino 111, 80131, Naples, Italy.|National Laboratory on Endocrine Disruptors of INBB, Naples, Italy.
authors: Mario
authors: M
authors: Argirò
authors: Institute of Genetics and Biophysics of CNR, Via Pietro Castellino 111, 80131, Naples, Italy. gustavo.mita@igb.cnr.it.|National Laboratory on Endocrine Disruptors of INBB, Naples, Italy. gustavo.mita@igb.cnr.it.
authors: Damiano Gustavo
authors: DG
authors: Mita
authors: National Laboratory on Endocrine Disruptors of INBB, Naples, Italy.|Department of Biology, University Federico II, Naples, Italy.
authors: Marco
authors: M
authors: Guida
authors: National Laboratory on Endocrine Disruptors of INBB, Naples, Italy.|Department of Experimental Medicine, Second University of Naples, Naples, Italy.
authors: Marianna
authors: M
authors: Portaccio
authors: Department of Biotechnology, Prof. Assen Zlatarov University, Burgas, Bulgaria.
authors: Tzonka
authors: T
authors: Godievargova
authors: Department of Biotechnology, Prof. Assen Zlatarov University, Burgas, Bulgaria.
authors: Yavour
authors: Y
authors: Ivanov
authors: Polymer Materials Research Department, Advanced Technology and New Materials Research Institute, MuCSAT, Alexandria, Egypt.
authors: Mahmoud T
authors: MT
authors: Tamer
authors: Polymer Materials Research Department, Advanced Technology and New Materials Research Institute, MuCSAT, Alexandria, Egypt.
authors: Ahmed M
authors: AM
authors: Omer
authors: Polymer Materials Research Department, Advanced Technology and New Materials Research Institute, MuCSAT, Alexandria, Egypt.|Faculty of Science, Chemistry Department, University of Jeddah, Jeddah, Saudi Arabia.
authors: Mohamed S
authors: MS
authors: Mohy Eldin
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D000327:Adsorption; D004058:Diffusion; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D010226:Parabens / Q000737:chemistry*; D012996:Solutions; D013816:Thermodynamics; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
chemical_list: D000180:Acrylic Resins; D010226:Parabens; D012996:Solutions; D014874:Water Pollutants, Chemical; C010504:polyacrylonitrile; C015358:methylparaben
keywords: Adsorption; Diffusion isothermal models; Kinetics; Methylparaben removal; PAN beads