CAJ | 학술논문

目的：以铁作为电极，研究电絮凝法处理含多种重金属废水的影响因素及效果。方法通过控制pH、停留时间、电流密度、电导率、废水初始浓度等因素至不同水平，考察处理效果、能耗及极板消耗的变化。结果随着停留时间、pH值及电流密度的升高，处理效果越好，但升高至一定程度后，处理效果提升并不明显；电导率对处理效果影响并不显著，但过低的电导率会增加能耗；废水初始浓度越高，要达到处理目标所需的能耗及极板消耗均越高。结论当pH为8.5~9.0、进水电导率为1500~2000μs/cm、停留时间为3~4 min、废水初始质量浓度＜20 mg/L、电流密度为13.2~19.8 A/m2时，处理效果最理想，对总铜、总镍、总铅、总锌、总镉及总铬的去除率达到99%以上，且能耗与极板消耗均为最低，电絮凝法更适合于重金属废水的深度处理。
목적：이철작위전겁，연구전서응법처리함다충중금속폐수적영향인소급효과。방법통과공제pH、정류시간、전류밀도、전도솔、폐수초시농도등인소지불동수평，고찰처리효과、능모급겁판소모적변화。결과수착정류시간、pH치급전류밀도적승고，처리효과월호，단승고지일정정도후，처리효과제승병불명현；전도솔대처리효과영향병불현저，단과저적전도솔회증가능모；폐수초시농도월고，요체도처리목표소수적능모급겁판소모균월고。결론당pH위8.5~9.0、진수전도솔위1500~2000μs/cm、정류시간위3~4 min、폐수초시질량농도＜20 mg/L、전류밀도위13.2~19.8 A/m2시，처리효과최이상，대총동、총얼、총연、총자、총력급총락적거제솔체도99%이상，차능모여겁판소모균위최저，전서응법경괄합우중금속폐수적심도처리。
Objective To study the influencing factors on heavy metals removal by electrocoagulation treatment. Meth-ods Wastewater was treated with electrocoagulation by using iron plate as electrode. Several affecting factors, such as reten-tion time, initial pH, current density, conductivity and initial concentration were investigated. Results The removal rate was obviously improved with the increase of retention time, initial pH and current density, however, the improvement of treatment effect did not continue after reaching a certain level. Conductivity did not influence the treatment effect, but low conductivity increased energy consumption. To achieve the desired treatment effect, the higher the initial concentration of wastewater, the higher the consumption of energy and plates. Conclusion Electrocoagulation was more suitable for advanced treatment of wastewater containing heavy metals. The removal rates of total copper, total nickel, total lead, total zinc, total cadmium and total chromium were above 99% under the conditions of initial pH of 8. 5~9. 0, conductivity of 1500~2000μs/cm, retention time of 3~4 min, current density of 13. 2~19. 8 A/m2 and initial concentration of 0~20 mg/L.