2011•Environmental TechnologyRequires access

Chemical degradation of polyacrylamide by advanced oxidation processes

Mang Lu, Xuejiao Wu, Xiaofang Wei

Abstract

This paper presents the results obtained from the oxidation of polyacrylamide (PAM) by the UV/H2O2, Fenton, UV/Fenton, visible light/Fenton, visible light/Fenton/C2O4(2-), UV/Fenton/C2O4(2-), visible light/Fenton/C4H4O6(2-) and UV/Fenton/C4H4O6(2-) processes. Degradation efficiency for PAM had the following order: UV/Fenton/C4H4O6(2-) > UV/Fenton/C2O4(2-) > visible light/Fenton/C4H4O6(2-) > visible light/Fenton/C2O4(2-) > UV/Fenton > visible light/Fenton > UV/H2O2 > Fenton. The addition of tartrate had a positive effect on chemical oxygen demand (COD) removal. Increasing the concentrations of reagents promoted the oxidation of PAM by the UV/Fenton/C4H4O6(2-) process. The presence of NaCl led to large decreases in the COD removal in the PAM solution.

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Key concepts: Chemistry, Visible spectrum, Degradation (telecommunications), Hydroxyl radical, Polyacrylamide, Reagent, Fenton's reagent, Photochemistry