Study and Application of the Degradation of Organic Pollutions in Cathode Space of Diaphragm Electrolytic Cell

Adopting membrane electrolysis,electrochemical reaction of Rhodamine B(RhB) and Nitrobenzene(NB) on the surface of stainless steel cathode were studied respectively.The results showed that at the conditions that with existence of dissolved oxygen,initial concentrations of RB and NB were 50 mg/L and 200 mg/L respectively,voltage 20 V,electrolysis lasting for 2 h,the removal rates of CODCr were 21% and 36% respectively.Free radicals such as HO2 and OH produced from the reaction between H and O2 in the cathode space,which consequently resulting in further degradation of organic pollutions.A dyeing wastewater treatment trial in the lab,based on the experiment and reaction mechanism of cathode electrolysis,achieved a relative good removal result.