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Binding of heavy metal ions by chemically modified woods
Author(s) -
Morita Mitsuhiro,
Higuchi Mitsuo,
Sakata Isao
Publication year - 1987
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.1987.070340312
Subject(s) - adsorption , metal ions in aqueous solution , metal , hydroxylamine , chemistry , uranium , dithiocarbamate , nuclear chemistry , inorganic chemistry , polymer chemistry , organic chemistry , materials science , metallurgy
Three chemically modified woods were prepared and used for the binding of heavy metal ions. Wood–polythylenimine composite (wood–PEI) was found to be effective for the adsorption of heavy metal ions such as Hg 2+ , Cu 2+ , and other metal ions which tend to form stable ammine complexes. Adsorption of metal ions on a wood–PEI derivative containing dithiocarbamate group (DTC–wood) was higher than that by wood–PEI. Especially, the reactivity of DTC–wood with Hg 2+ was quite high and the binding capacity of about 5 mmol/g was easily attainable. The rate of adsorption on these wood‐based adsorbents was very high, and adsorption of about 70% of total binding capacity was accomplished in the first 1 h. This may be due to a highly porous structure and a hydrophilic nature of the wood which constitutes the skeleton of the adsorbents. Amidoximated wood (AO–wood) prepared by the reaction of cyanoethylated wood with hydroxylamine showed selective adsorptivity for uranium in sea water. More than 53% of uranium in the sea water used was adsorbed by the AO–wood.