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Single step modification of micrometer‐sized polystyrene particles by electromagnetic polyaniline and sorption of chromium(VI) metal ions from water
Author(s) -
Debnath Mithun K.,
Rahman Mohammad A.,
Minami Hideto,
Rahman Mohammad M.,
Alam Mohammad A.,
Sharafat Mohammad K.,
Hossain Mohammad K.,
Ahmad Hasan
Publication year - 2019
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.47524
Subject(s) - adsorption , polyaniline , materials science , polystyrene , sorption , freundlich equation , composite number , aniline , polymerization , chemical engineering , metal ions in aqueous solution , nanocomposite , nanoparticle , metal , polymer chemistry , nuclear chemistry , polymer , composite material , chemistry , nanotechnology , organic chemistry , metallurgy , engineering
This article describes a single‐step reproducible approach for the surface modification of micrometer‐sized polystyrene (PS) core particles to prepare electromagnetic PS/polyaniline–Fe 3 O 4 (PS/PANi–Fe 3 O 4 ) composite particles. The electromagnetic PANi–Fe 3 O 4 shell was formed by simultaneous seeded chemical oxidative polymerization of aniline and precipitation of Fe 3 O 4 nanoparticles. The weight ratio of PS to aniline was optimized to produce core–shell structure. PS/PANi–Fe 3 O 4 composite particles were used as adsorbent for the removal of Cr(VI) via anion‐exchange mechanism. The composite particles possessed enough magnetic property for magnetic separation. The adsorption was highly pH dependent. Adsorption efficiency reached 100% at pH 2 in 120 min when 0.05 g of composite particles was mixed with 30 mL 5 mg L −1 Cr(VI) solution. The adsorption isotherm fitted best with Freundlich model and maximum adsorption capacity approached 20.289 mg g −1 at 323 K. The prepared composite was found to be an useful adsorbent for the removal of soluble Cr(VI) ions. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47524.