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Preparation of Poly(acrylic acid) ‐Boron Nitride Composite as a Highly Efficient Adsorbent for Adsorptive Removal of Heavy Metal Ions
Author(s) -
Lu Mang
Publication year - 2021
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202100295
Subject(s) - acrylic acid , adsorption , boron nitride , langmuir adsorption model , metal ions in aqueous solution , potassium persulfate , aqueous solution , materials science , nuclear chemistry , fourier transform infrared spectroscopy , polymerization , inorganic chemistry , gibbs free energy , chemistry , chemical engineering , metal , composite material , polymer , metallurgy , physics , monomer , quantum mechanics , engineering
Abstract The poly(acrylic acid)‐boron nitride composite was prepared by radical initiated polymerization in situ with N,N′‐methylenebisacrylamide (MBAA) as a crosslinker and potassium persulfate (KPS) as an initiator and the structure of poly(acrylic acid)‐boron nitride were characterized by Fourier Transform infrared spectroscopy (FT‐IR), scanning electron microscope (SEM). The ability of poly(acrylic acid)‐boron nitride as adsorbent for adsorptive removal of heavy metal ion from aqueous solutions was investigated. The effects of poly(acrylic acid)‐boron nitride dosage, pH, adsorption time, initial metal ion concentration and temperature on adsorption efficiency were also studied. Kinetics data followed best by pseudo‐second‐order model with the correlation coefficient (R 2 ) of 0.997. The equilibrium adsorption data was well fitted to Langmuir isotherm models for Cu(II). The adsorption capacities (q max ) of poly(acrylic acid)‐boron nitride composite for Cu(II) was 46.72 mg/g. The results of thermodynamic equilibrium constant and the Gibbs free energy indicated the spontaneous nature of the adsorption process.