Adsorption of Chromium(VI) from Aqueous Solutions by Coffee Polyphenol-Formaldehyde/Acetaldehyde Resins

Table 1

Composition of coffee polyphenol-formaldehyde (CFA) resins.

Resin code	Coffee powder (g)	Formaldehyde (mL)	Ammonia (mL)
CFA 01	4	5	10
CFA 02	4	10	10
CFA 03	4	15	10
CFA 04	4	20	10
CFA 05	4	25	10