石墨-活性炭复合电极对含磷废水处理的研究

Research on Treatment of Wastewater Containing Phosphorus by Graphite-Activated Carbon Composite Electrodes

磷的含量是导致水体富营养化的主要控制因素。电吸附技术作为一种新型的除磷技术具有很多优点。文章研究了一种新型碳基复合材料制备的电极:石墨-活性炭复合电极,并进行了活性炭电极的改性和表征。通过表征发现,过氧化氢溶液改性的方法可以扩大孔径,增大比表面积,增强活性炭的吸附能力。电吸附试验表明,在电压为3.6 V、磷初始浓度为1 mg/L的含磷溶液中,通电24 h两种改性活性炭电极材料对磷的去除效率分别为91%和77%。

The content of phosphorus is the main controlling factor of water eutrophication.As a new type of phosphorus removal technology,electric adsorption technology has many advantages.In this paper,a new type of carbon matrix composite electrode:graphite-activated carbon composite electrode is studied,and the modification and characterization of activated carbon electrode are carried out.Characterization analysis shows that the method of hydrogen peroxide modification can increase the pore size and specific surface area,thereby enhancing the adsorption capacity of activated carbon.In a phosphorous solution with a voltage of 3.6 V lasting for 24 hours and an initial phosphorus concentration of 1 mg/L,the removal efficiency of phosphorus was 91%and 77%by the two activated carbon electrode materials.