Assessment of the photocatalytic degradation of dimethyl disulfide: effect of pH, temperature and concentration of the organic contaminant

This work aimed to assess the photocatalytic degradation of a model odor compound (dimethyl disulfide, DMDS), found in liquid and gaseous wastes of plants for processing poultry byproducts. The effect of pH and temperature on adsorption and photocatalytic degradation was evaluated through factorial experimental designs. The results suggest the presence of an optimum region for adsorption, at 45.0 oC and pH 4.0. In the photocatalytic runs an optimum for temperature and pH was also observed. At 45 oC and pH 4.0 the removal of DMDS was 99% after 60 min of irradiation.