Synthesis of novel methacrylate based adsorbents and their sorptive properties towards p-nitrophenol from aqueous solutions

ERDEM M., Yueksel E., Tay T., ÇİMEN Y., TÜRK H.

JOURNAL OF COLLOID AND INTERFACE SCIENCE, vol.333, no.1, pp.40-48, 2009 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 333 Issue: 1
  • Publication Date: 2009
  • Doi Number: 10.1016/j.jcis.2009.01.014
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.40-48
  • Keywords: p-Nitrophenol, Adsorption, 2-Dimethylaminoethyl methacrylate, [2-(Methacryloyloxy)ethyl]dimethylhexadecylammonium, bromide, PHENOLIC-COMPOUNDS, ADSORPTION CHARACTERISTICS, WASTE-WATER, REMOVAL, 4-NITROPHENOL, RESIN, COPOLYMERS, SEPARATION, XAD-4
  • Anadolu University Affiliated: Yes


The polymeric adsorbents were synthesized from 2-dimethylaminoethyl methacrylate (DMA) and [2(methacryloyloxy)ethyl]dimethylhexadecylammonium bromide (DMAC(16)) monomers in the presence of ethylene glycol dimethacrylate (EDMA) cross-linking monomer using suspension polymerization technique and their adsorption efficiencies in the removal of p-nitrophenol from aqueous solutions were investigated. DMAC16 monomer was prepared by means of modification of DMA monomer with 1-bromohexadecane. Adsorption experiments were carried out in a batch system and the experimental parameters were evaluated with respect to pH, agitation time, temperature and initial p-nitrophenol concentration. It was observed that the adsorbent poly[2-(methacryloyloxy)ethyl]methy]hexadecylamonium bromide (p-DMAC(16)) prepared from DMAC16 monomer was more effective in the removal of p-nitrophenol than the adsorbent poly(2-dimethylaminoethyl methacrylate) (p-PMA) prepared from DMA monomer. The effective pH ranges for the adsorption of p-nitrophenol onto p-DMAC(16) and p-DMA were 2-12 and 3-9, respectively. Langmuir and Freundlich adsorption models were used to describe the isotherms and find isotherm constants. The Langmuir model was well agreed with experimental data for both adsorbents. The pseudo-first-order, pseudo-second-order, and intraparticle diffusion kinetic models were used to understand the mechanism of the adsorption process and it fitted very well the pseudo-second-order kinetic model for each adsorbent. Thermodynamic parameters such as activation energy and changes of free energy, enthalpy, and entropy were also evaluated for the adsorption of p-nitrophenol onto each adsorbent. Additionally, reusability of the adsorbents was investigated and the results showed that both adsorbents can be employed many times without a significant loss in their adsorption capacities for the removal of p-nitrophenol from water. (C) 2009 Elsevier Inc. All rights reserved.