| The functional groups of iron hydroxides may sequestrate some cations and anions. |
| Subsequent oxidation-reduction reactions can also produce superoxide anions, hydrogen peroxide and hydroxyl radicals. |
| The channel is impermeable to anions but is permeable to a diverse group of cations. |
| An ionic compound is composed of a network of ions that results in a three-dimensional matrix of cations and anions. |
| Xanthate anions and protonated xanthic acid contain a free thiol moiety and are highly reductive. |
| Examples of compounds or groups that accept anions include the nitrate and hydroxide radicals. |
