Kinetics and thermodynamic studies of Methyl Orange removal by polyvinylidene fluoride-PEDOT mats  

作　　者：Romario J.da Silva Lizeth Carolina Mojica-Sanchez Filipe D.S.Gorza Graciela C.Pedro Bruna G.Maciel Gabriela P.Ratkovski Herica D.daRocha Kamila T.O.do Nascimento Juan CMedina-Llamas Alicia E.Chavez-Guajardo Jose J.Alcaraz-Espinoza Celso P.de Melo 

机构地区：[1]Program a de Pos-Graduagao em Ciencia de Materials,U niversidade Federal de Pernambuco,50670-901 Recife,PE,Brazil [2]Departamento de Ffsica,Uniuersidade Federal de Pemambiico,50670-901 Reci/e,PE,Brazil [3]Centro de Estudios Cientificosy Tecnologicos No.18,Instituto Politecnico Nacional,98160 Zacatecas,Zac,Mexico [4]Unidad Academica de Ciencias de la Tierra,Uniuersidad Aut6noma de Zacatecas,98058 Zacatecas,Zac,Mexico [5]Departamento de Quimica,Universidad Autonoma Metropolitana,09340,Ciudad de Mexico,Mexico

出　　处：《Journal of Environmental Sciences》2021年第2期62-73,共12页环境科学学报（英文版）

摘　　要：We report the preparation of poly(3,4-ethylene dioxythiophene)(PEDOT)-modified polyvinylidene fluoride electrospun fibers and their use as a novel adsorbent material for the removal of the anionic dye Methyl Orange(MO)from aqueous media.This novel adsorbent material can be used to selectively remove MO on a wide p H range(3.0-10.0),with a maximum capacity of 143.8 mg/g at p H 3.0.When used in a recirculating filtration system,the maximum absorption capacity was reached in a shorter time(20 min)than that observed for batch mode experiments(360 min).Based on the analyses of the kinetics and adsorption isotherm data,one can conclude that the predominant mechanism of interaction between the membrane and the dissolved dye molecules is electrostatic.Besides,considering the estimated values for the Gibbs energy,and entropy and enthalpy changes,it was established that the adsorption process is spontaneous and occurs in an endothermic manner.The good mechanical and environmental stability of these membranes allowed their use in at least 20 consecutive adsorption/desorption cycles,without significant loss of their characteristics.We suggest that the physical-chemical characteristics of PEDOT make these hybrid mats a promising adsorbent material for use in water remediation protocols and effluent treatment systems.

关 键 词：ELECTROSPINNING Composite mats Pedot Pvdf mats Dye removal Water remediation 

分 类 号：O64[理学—物理化学]