Strong binding metal-chelating resins

A process for removing one or more metallic components that are contained in an aqueous solution and/or a non-aqueous solution, the process comprising the step of contacting an aqueous solution or a non-aqueous solution containing one or more metallic components with a metal-chelating resin for a time sufficient to reduce the concentration of the one or more metallic components in the aqueous solution and/or the non-aqueous solution, wherein the metal-chelating resin comprises:

• (a) a compound represented by Formula (I):
• or a stereoisomeric form thereof or a salt thereof, wherein:
• R1, R2, R3 and R4 are independently a protonated or deprotonated, substituted or unsubstituted 2-hydroxybenzyl moiety optionally containing a linking group for covalently linking the compound of Formula (I) to an organic polymer resin, a protonated or deprotonated, substituted or unsubstituted carboxyalkyl-containing moiety, wherein the alkyl group is a substituted or unsubstituted methylene group or a substituted or unsubstituted ethylene group optionally containing a linking group for covalently linking the compound of Formula (I) to an organic polymer resin, a protonated or deprotonated, substituted or unsubstituted phosphonoalkyl-containing moiety, wherein the alkyl group is a substituted or unsubstituted methylene group or a substituted or unsubstituted ethylene group optionally containing a linking group for covalently linking the compound of Formula (I) to an organic polymer resin, or a protonated or deprotonated, substituted or unsubstituted hydroxyalkyl-containing moiety, wherein the alkyl group is a substituted or unsubstituted ethylene group or a substituted or unsubstituted propylene group optionally containing a linking group for covalently linking the compound of Formula (I) to an organic polymer resin;
• and
• Ra, Rb, Rc and Rd are independently hydrogen, a substituted or unsubstituted hydrocarbyl group of from 1 to about 18 carbon atoms, a halogen, a polar functional group, a linking group for covalently linking the compound of Formula (I) to an organic polymer resin or one of adjacent Ra and Rc or Ra and Rd or Rb and Rc or Rb and Rd are joined together to form a cis- or trans-cyclopentane moiety or a cis- or trans-cyclohexane moiety;
• and
• wherein at least one linking group for covalently linking the compound of Formula (I) to an organic polymer resin occurs in the compound;
• and
• wherein the at least one linking group is represented by the formula —(CH2)x—NHR5 where x is 2 to 6, and R5 is independently hydrogen, methyl or ethyl;
• and
• (b) an organic polymer resin having at least one complementary reactive functional group covalently linked with the at least one linking group of the compound represented by Formula (I), wherein the organic polymer resin comprises a styrenic polymer or copolymer, an acrylic polymer or copolymer, or a methacrylic polymer or copolymer.