TY - JOUR
T1 - Kinetics and thermodynamic studies of Methyl Orange removal by polyvinylidene fluoride-PEDOT mats
AU - da Silva, Romário J.
AU - Mojica-Sánchez, Lizeth Carolina
AU - Gorza, Filipe D.S.
AU - Pedro, Graciela C.
AU - Maciel, Bruna G.
AU - Ratkovski, Gabriela P.
AU - da Rocha, Hérica D.
AU - do Nascimento, Kamila T.O.
AU - Medina-Llamas, Juan C.
AU - Chávez-Guajardo, Alicia E.
AU - Alcaraz-Espinoza, José J.
AU - de Melo, Celso P.
N1 - Publisher Copyright:
© 2020
PY - 2021/2
Y1 - 2021/2
N2 - 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 pH range (3.0–10.0), with a maximum capacity of 143.8 mg/g at pH 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.
AB - 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 pH range (3.0–10.0), with a maximum capacity of 143.8 mg/g at pH 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.
KW - Composite mats
KW - Dye removal
KW - Electrospinning
KW - Pedot
KW - Pvdf mats
KW - Water remediation
UR - http://www.scopus.com/inward/record.url?scp=85088291694&partnerID=8YFLogxK
U2 - 10.1016/j.jes.2020.04.034
DO - 10.1016/j.jes.2020.04.034
M3 - Artículo
C2 - 33279054
AN - SCOPUS:85088291694
SN - 1001-0742
VL - 100
SP - 62
EP - 73
JO - Journal of Environmental Sciences (China)
JF - Journal of Environmental Sciences (China)
ER -