Characteristics of adsorption isotherm and kinetic study for newly prepared Co2+-imprinted polymer linkage with dipicolinic acid

International Fundamentum Science Symposium 2018

自然科学;工业技术

Yusof, N.F.^1 ; Mehamod, F.S.^2 ; Kadir, M.A.^2 ; Suah, F.B.M.^3

School of Fundamental Science, Universiti Malaysia Terengganu, Kuala Nerus

21030, Malaysia^1

Advanced Nano Materials Research Group, School of Fundamental Science, Universiti Malaysia Terengganu, Kuala Nerus

21030, Malaysia^2

School of Chemical Sciences, Universiti Sains Malaysia (USM), Pulau Pinang-Minden

11800, Malaysia^3

关键词: Adsorption capacities;    Adsorption equilibria;    Azobisisobutyronitrile;    Ethylene glycol dimethacrylate;    Ion imprinted polymer;    Langmuir isotherm models;    Non-imprinted polymers;    Scanning electron micrographs;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/440/1/012005/pdf
DOI  :  10.1088/1757-899X/440/1/012005

来源: IOP

【 摘 要 】

Co2+-complex imprinted polymer (Co-IIP) was prepared by ionic imprinting technology for selective removal of Co2+ ions from aqueous solution. Co2+ which act as a template ion established a coordination linkage with dipicolinic acid before being copolymerized with functional monomer (methacrylic acid) in the presence of cross-linker (ethylene glycol dimethacrylate) and initiator (2,2′-azobisisobutyronitrile). The surface features and functional groups present in imprinted polymer were characterized by scanning electron micrograph and infrared spectra. The non-imprinted polymer (NIP) was produced simultaneously to serve as controlled polymer. From the isotherm study, adsorption of Co2+ ions by ion imprinted polymer (IIP) followed Langmuir isotherm model, which indicates the sorption can be described by monolayer adsorption by give the maximum adsorption capacity was 19.57 mg g-1. This value was comparable to the experimental value which was 18.48 mg g-1 and better affinity compared to NIP. The adsorption kinetics fit a pseudo-second-order and adsorption equilibrium time was around 30 minutes. The present work has successfully synthesized Co-IIP particles with good potential in recognition of Co2+ ions.