CAJ | 학술논문

以铁作为极板,采用周期换向电絮凝法处理含铬废水,考察了初始pH值,电流密度,处理时间,初始质量浓度及周期换向时间等因素的影响.结果表明,在初始pH值为8.0~9.0,电流密度为16.37A/m2,处理时间为3.0min,初始浓度为40mg/l时,总铬和六价铬的去除效果理想,去除率均在99.5%以上；10~15min 的换向周期在一定程度上解决了极板钝化问题,可降低10%~20%的能耗.实验结果表明周期换向电絮凝法处理含铬废水效果好,且可降低能耗.
이철작위겁판,채용주기환향전서응법처리함락폐수,고찰료초시pH치,전류밀도,처리시간,초시질량농도급주기환향시간등인소적영향.결과표명,재초시pH치위8.0~9.0,전류밀도위16.37A/m2,처리시간위3.0min,초시농도위40mg/l시,총락화륙개락적거제효과이상,거제솔균재99.5%이상；10~15min 적환향주기재일정정도상해결료겁판둔화문제,가강저10%~20%적능모.실험결과표명주기환향전서응법처리함락폐수효과호,차가강저능모.
Wastewater containing chromium was treated with periodic reversal electrocoagulation by using iron plate as electrode. Several affecting factors for the removal of chromium, such as initial concentration, pH, retention time, reversal period and current density were investigated. The results showed that the removal rates of total Chromium and Chromium (VI) were above 99.5%under initial concentration of 40 mg/L, pH of 8.0~9.0, retention time of 2min and current density of 16.37A/m2. Furthermore, the electrode passivation was reduced with the reversal period of 10~15min, and the energy consumption decreased by 10%~20%. The experiment results indicated that periodic reversal electrocoagulation was effectively and energy-saving for treatment of wastewater containing chromium.