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Preparation and adsorption properties for metal ions of chitin modified by L ‐cysteine
Author(s) -
Shao Jian,
Yang Yumin,
Shi Chuanguo
Publication year - 2003
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.12098
Subject(s) - adsorption , chitin , metal ions in aqueous solution , chemistry , metal , nuclear chemistry , sulfuric acid , fourier transform infrared spectroscopy , inorganic chemistry , nitric acid , chitosan , polymer chemistry , organic chemistry , chemical engineering , engineering
A new adsorbent for heavy metal ions, cys‐chitin, was produced by modifying chitin in THF with L ‐cysteine in the presence of sulfuric acid as a catalyst. Its structure was confirmed by elemental analysis and FTIR spectra analysis. The adsorption properties of cys‐chitin for Cu II , Cd II , Pb II , Zn II , and Ni II were investigated. The effect of pH value on adsorption and adsorption kinetics was examined. The results indicate that the cys‐chitin has much better adsorption for Cd II , Pb II , and Zn II than chitin itself. The adsorption capacities of cys‐chitin for Cd II , Pb II , and Zn II were 214.6, 351.5, and 107.0 mg/g, respectively. It also had good adsorption properties for heavy metal ions. The adsorption capacities were also affected by the acidity of medium. The adsorbed Cd II , Pb II could be eluted by diluted nitric acid. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 88: 2575–2579, 2003