When the initial concentration of NB changed from 50 mg/L to 1000 mg/L, the CODCr removal rate increased in the beginning then declined subsequently.

• 随着溶液初始浓度从50 mg/L增加到1000 mg/L，电解液的CODCr去除率先升高而下降，在初始浓度为501.；5 mg/L时达到最高值；