5-Methylpyridine-3-carboxamide
2-Mercaptobenzooxazole-5-carboxylic acid
7-Nitro-4-hydroxyquinazoline
5-(tert-Butoxycarbonylamino)-2-methoxypyridine-4-carboxylic acid
4-Sulfobenzenediazonium tetrafluoroborate
Benzoylthio-O-methyl ester carbamic acid
for the removal and recovery of metals from wastewater