TY  - JOUR
AV  - none
N1  - cited By 53
N2  - Polyvinyl alcohol (PVA) hydrogel are still restricted for some applications because their lower mechanical strength and thermal stability. The PVA-based composites are drawing attention for the removal of heavy metals based on their specific functionality in adsorption process. The main objective of this work is to synthesize oil palm bio-waste (OPB)/multiwalled carbon nanotubes (MWCNTs) reinforced PVA hydrogels in the presence of N, N0-methylenebisacrylamide (NMBA) as a crosslinking agent and ammonium persulfate (APS) as an initiator via simple in-situ polymerization technique. The as-prepared reinforced nanocomposites were characterized by FESEM, BET surface area, differential scanning calorimetry (DSC), TGA and FTIR analysis. The possible influence of OPB and MWCNTs on the tensile strength, elongation at break and elastic modulus of the samples were investigated. It was found that reinforced nanocomposites exhibited enhanced mechanical properties as compared to non-reinforced material. The evaluation of reinforced nanocomposites was tested by the removal of Pb(II) aqueous solutions in a batch adsorption system. The pseudo-second-order kinetic model was used to illustrate the adsorption kinetic results and Langmuir isotherm was more suitable to fit the equilibrium results providing maximum adsorption capacities. The evaluation of thermodynamic parameters describes the spontaneous, endothermic and chemisorption adsorption process while activation energy reveals the physical adsorption mechanism. Therefore, the coordination effects among OPB, MWCNTs and PVA polymer hydrogels can produce a promising adsorbent material for wastewater treatment applications. © 2020 by the authors.
IS  - 2
KW  - Activation energy; Ammonium persulfate; Differential scanning calorimetry; Dyes; Heavy metals; Hydrogels; Isotherms; Kinetics; Lead compounds; Mechanisms; Metal drawing; Multiwalled carbon nanotubes (MWCN); Nanocomposites; Nanotubes; Palm oil; Polymerization; Polyvinyl alcohols; Reinforced plastics; Reinforcement; Tensile strength; Wastewater treatment
KW  -  Adsorption capacities; In-situ polymerization; Methylene bisacrylamide; Oil palm empty fruit bunch; Poly (vinyl alcohol) (PVA); Pseudo-second-order kinetic models; Reinforced nanocomposite; Thermodynamic parameter
KW  -  Adsorption
TI  - Ecient removal of PB(II) from aqueous solutions by using oil palm bio-waste/MWCNTs reinforced pva hydrogel composites: Kinetic, isotherm and thermodynamic modeling
ID  - scholars13485
Y1  - 2020///
SN  - 20734360
PB  - MDPI AG
UR  - https://www.scopus.com/inward/record.uri?eid=2-s2.0-85081248066&doi=10.3390%2fpolym12020430&partnerID=40&md5=a6f0e48c13655d1e6ef5bcd2854a51d7
A1  - Zulfiqar, M.
A1  - Lee, S.Y.
A1  - Mafize, A.A.
A1  - Kahar, N.A.M.A.
A1  - Johari, K.
A1  - Rabat, N.E.
JF  - Polymers
VL  - 12
ER  -