Removal of Toxic Organic Pollutants from Coke Plant Wastewater by UV-Fenton

Coke plant wastewater containing lots of toxic organic pollutants should be treated before being discharged into the environment. It is challenging to treat toxic and refractory compounds using conventional methods. In this study, a UV-Fenton technology was investigated. When the initial COD, NH3-N concentration and SS of wastewater were 5080 mg/L, 329.9 mg/L, and 847.7 mg/L, results showed that the removal rate of COD, NH3-N and SS were 88.0%, 58.4% and 99.2% respectively under the optimal reaction conditions. Under the identified optimal condition, H2O2 concentration is 75 mmol/L, the concentration ratio of H2O2 and Fe2+ is 3:1, and original pH is 4 within 30 min. GC-MS analysis, revealed that organic substances such as indole and quinoline were degraded effectually.