材料药剂过硫酸铵改性石墨毡阴极的降解性能

Degradation capability of graphite felt cathode modified by ammonium persulfate

采用过硫酸铵改性石墨毡(GF),研究了改性GF的物理化学性能,并考察了将其用作三维电极阴极对实际印染废水污染物的降解性能。表征结果表明,改性后GF的比表面积增大,接触角变小,含氧官能团增多,催化活性增强。实验结果表明:改性后GF的电催化产H_(2)O_(2)性能明显增强,120 min内H_(2)O_(2)产生量为128 mg/L,且具有较好的稳定性;处理实际印染废水120 min后,COD、氨氮去除率分别达70.35%和97.59%,比未改性时分别增加了30.21百分点和45.89百分点,降解性能显著提升。

Graphite felt(GF)was modified using ammonium persulfate,and the physical and chemical properties of the modified GF were studied.The modified GF was used as a three-dimensional electrode cathode,and its degradation capability to pollutant in actual dyeing wastewater was investigated.The characterization results show that the modified GF has larger specific surface area,smaller contact angle,more oxygen-containing functional groups and stronger catalytic activity.The experimental results show that:the capability of modified GF on electrocatalytic H_(2)O_(2) production is significantly enhanced and stability with 128 mg/L of H_(2)O_(2) production in 120 min;After treated for 120 min,the removal rates of COD and ammonia nitrogen in the actual dyeing wastewater reached 70.35%and 97.59%,respectively,which increased by 30.21 percentage points and 45.89 percentage points,respectively,compared with the unmodified system,and the degradation capability is significantly improved.