تجزیه 4-کلروفنل به وسیله نور خورشید با استفاده از کاتالیزور اکسید روی

Background and purpose: Chrophenols represent one of the most abundant toxic compounds of industrial which are resistant to biodegradation and persist in the environment for long time. Sunlight is the source of many photochemical reactions. The present study aimed to determine degradation of 4-chlrophenol as persistent organic compound by sunlight in the presence of zinc oxide as a catalyst. Materials and methods: This study was performed in batch conditions. Determined amount of catalyst was added to defined volume of 4-chlorophenol solution which was adjusted pH. Effects of parameters such as ZnO loading, PH, and contact time were investigated. The remaining concentrations of 4-chlorophenol were analyzed by HPLC (high-performance liquid chromatography). Results: The results showed that sunlight in present of zinc oxide as nanocatalyst lead to almost 75% degradation of 4-chlorophenol in optimum conditions (zinc oxide loading = 1.5 g/l, alkalin pH). Zinc Oxide loses photocatalytic property in acidic pH. Conclusion: Sunlight using catalyst of zinc oxide lead to degradation of persistent organic compounds significantly. The catalyst is not consumed and reusable.