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

Figure 2

Comparison of coffee polyphenol based resins on chromium adsorption. CFA: coffee polyphenol-formaldehyde resins; CAA: coffee polyphenol-acetaldehyde resins; BCP: blank coffee powder.