Phosphorus removal from wastewater is very important in order to prevent water eutrophication. Although there are many ways to remove phosphorus, electrocoagulation (EC) is a promising method. However, the efficiency of conventional EC processes needs to be further improved. In this study, magnetized iron particle anodes used for EC were fabricated and batch experiments were conducted. The results showed that magnetized anode configuration (iron powder, iron filings, iron sheet), current density (i), as well as electrolysis time had significant effects on phosphorus removal. Particle electrodes (e.g., iron powder) with both large specific surface area and high current density were beneficial for phosphorus removal. Simultaneously, anode magnetization could also enhance the phosphorus removal to some extent based on the effect of magnetic field (MF) on water characteristics (e.g., conductivity). Combining the advantages of particle electrode and MF, magnetized particle anode was superior to other electrodes in phosphorus removal and cell voltage maintenance. Compared with the conventional plate anode, the magnetized iron particle anode was more economical and could reduce operating cost by more than 50%. The results are useful for the practical application of phosphorus removal by EC.

为了防止水富营养化，从废水中去除磷非常重要。尽管有很多去除磷的方法，电凝（EC）是一种很有前途的方法。然而，常规EC工艺的效率需要进一步提高。在这项研究中，制造用于EC的磁化铁颗粒阳极并进行批处理实验。结果表明，磁化阳极构型（铁粉，铁屑，铁片），电流密度（i），电解时间对除磷有重要影响。具有大的比表面积和高的电流密度的颗粒电极（例如铁粉）有利于除磷。同时，基于磁场（MF）对水特性（例如电导率）的影响，阳极磁化还可以在一定程度上提高磷的去除率。结合粒子电极和MF的优点，磁化粒子阳极在除磷和维持电池电压方面优于其他电极。与传统的平板阳极相比，磁化铁颗粒阳极更经济，可将运行成本降低50％以上。该结果对于通过EC去除磷的实际应用是有用的。