Fluoride ion accelerating degradation of organic pollutants by Cu(II)-catalyzed Fenton-like reaction at wide pH range.

The degradation of rhodamine B in the F/Cu(II)/HO system was studied to evaluate the accelerating effect of F on the Cu(II)-catalyzed Fenton-like reaction. Effects of various parameters, such as F/Cu ratio, F and Cu concentrations, initial pH, temperature, HO and rhodamine B concentrations, were investigated. The results confirmed that there is a strong promoting effect of F on the Cu(II)-catalyzed Fenton-like reaction in a wide pH range of 4-11.

Catalytic wet peroxide oxidation of azo dye (Direct Blue 15) using solvothermally synthesized copper hydroxide nitrate as catalyst.

Copper hydroxide nitrate (Cu(2)(OH)(3)NO(3)) was synthesized solvothermally in anhydrous ethanol and characterized by XRD, FTIR, TG-DTA and SEM. The peroxide degradation of an azo dye (Direct Blue 15) on this material was evaluated by examining catalyst loading, initial pH, hydrogen peroxide dosage, initial dye concentration and temperature. The leaching of Cu from the copper hydroxide nitrate during the reaction was also measured.

Copper hydroxyphosphate as catalyst for the wet hydrogen peroxide oxidation of azo dyes.

Copper hydroxyphosphate was synthesized hydrothermally and characterized by XRD and SEM. The peroxide degradation of azo dye on this material was evaluated by examining initial pH, catalyst loading, H(2)O(2) dosage, initial dye concentration and temperature. Although copper hydroxyphosphate is a low surface area material without micropores or mesopores, it shows considerable activity for oxidative degradation of azo dyes under near-neutral pH conditions.