Correlation between the sorption of dissolved oxygen onto chitosan and its antimicrobial activity against Esherichia coli.

The ability of chitosan to adsorb dissolved oxygen from solution depends on its physical shape and is related to the surface area. Depending on conditions chitosan is capable of adsorbing or releasing oxygen. Chitosan, modificated by the substances possessing antimicrobial activity, such as succinic acid, Pd(II) ions, metallic Pd or Ag, distinctly increases the ability to adsorb the dissolved oxygen.

Decontamination of solutions containing Cu(II) and ligands tartrate, glycine and quadrol using metallic iron.

Decontamination of solutions containing Cu(II) complexes with tartrate, glycine and quadrol (N,N,N'N'-tetrakis(2-hydroxypropyl)ethylenediamine) using metallic iron depends on pH and proceeds best in mildly acidic solutions. Cu(II) is completely removed from all solutions containing the ligands investigated. The degree of ligand removal from solutions considerably differs.

Sorption of Cu(II) complexes with ligands tartrate, glycine and quadrol by chitosan.

The sorption by chitosan in Cu(II) solutions containing tartrate, glycine (amino acetic acid) and quadrol (N,N,N',N'-tetrakis(2-hydroxypropyl)ethylenediamine) as ligands has been investigated. The degree of sorbate removal strongly depends on pH. In solutions containing tartrate almost complete sorption of both Cu(II) and tartrate proceeds in mildly acidic and neutral solutions.

Decontamination of solutions containing EDTA using metallic iron.

EDTA removal from solutions using metallic iron was carried out at different values of pH, iron load and concentrations at free access of air and in closed vessels. The EDTA destruction was investigated using chemical and capillary electrophoresis analysis. Fe corrosion was studied voltammetrically and the composition of the precipitate formed was investigated using FT-IR spectroscopy and chemical analysis.

Removal of free and complexed heavy-metal ions by sorbents produced from fly (Musca domestica) larva shells.

Fly larva shells (FLS) are formed as a side product in the biological treatment of organic wastes, and chitin and chitosan produced from the FLS have been used as sorbents for heavy-metal ions. Sorbents are characterised by FT-IR measurements and pH-potentiometric titration and by determination of their surface area, and the content of main elements (C, N, P, S) and ashes. Free metal ions are sorbed best (up to 0.