Removal of Chloroacetanilide Herbicides from Water Using Heterogeneous Photocatalysis with TiO2/UV-A

Chloroacetanilide herbicides are widely used in the agricultural sector throughout world. Because of their poor biodegradability, high water solubility, and long persistence, chloroacetanilide have a potential to contaminate water, conventional treatment processes do not ensure sufficient removal. Therefore, heterogeneous photocatalysis using TiO2/UV-A was investigated for degradation alachlor, acetochlor, metolachlor from water. Two commercially available TiO2 (P25 AV-01) were as photocatalysts. Different experimental setups also tested. In addition, toxicity single mixtures photocatalytic products freshwater alga Chlorella kessleri via growth inhibition test. The maximum removal efficiency 97.5%, 93.1%, 98.2%, respectively. No significant differences observed photocatalysts used. Although concentrations all during decreased, resulting increased or remained same, indicating formation toxic products.