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电絮凝法与电催化氧化法去除纸业废水中有色有机物的研究
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摘要
近几十年来,电化学方法在治理环境污染方面的应用受到了广泛的关注。电絮凝法已在部分工业废水处理方面得到了应用。对于作为“环境友好的绿色技术”的电催化氧化法,寻找优良性能电催化氧化电极材料成为近年的研究热点。本论文以去除纸业废水中高浓度水溶性有色有机物为目的,进行了如下的研究工作:
     1、考察了影响铁和铝阳极电絮凝处理废水效果的主要因素。
     2、初步评价了掺杂部分过渡金属离子的PbO_2和SnO_2电极的电催化氧化效率。
     本论文研究主要获得了如下结论:
     1.影响铁和铝阳极电絮凝去除纸业废水中有色有机物的主要因素是通电量和废水的pH值。在最佳的处理条件下,铁和铝阳极电絮凝对废水中的有色有机物有高的去除率。对于铁电极,Q_s%=78.6%,Q_c%=64.5%;对于铝电极,Q_s%=62.2%;Q_c%=58.0%。
     2.掺杂镍可有效地提高SnO_2电极的催化氧化效率,镍的含量达到4.0%(wt.%),SnO_2电极的催化氧化效率最高,影响掺杂镍的SnO_2电极电催化氧化效率的主要因素是通电量和电流密度。
Electrochemical methods used in environmental contaminants treatment have attracted more and more attentions for recent several decades. In these methods, electroflocculation has reached profitable commercialization in some industrial wastewater treatment. For electrocatalytic oxidation, a "environment friendly green technology", investigative interest focus on developing new electrode material recently. Our work aimed at removal of colored organics in paper-making wastewater by electroflocculation and electrocatalytic oxidation. Work has been carried out as follow:
    1. To investigate main factors that influence removal efficiency of colored organics from paper-making wastewater by electroflocculation when Fe and Al metal was used as anode respectively.
    2. To investigate initially electrocatalytic oxidation efficiency of PbO2 and SnO2 electrodes doped some transition metal ions.
    
    
    
    Main experimente conclusions are given as follow:
    1. Main factors that influence removal efficiency of colored organics from the wastewater are charge loading and pH value by electroflocculation when Fe and Al was used as anode respectivily. Under perfect treatment conditions, high removal efficiency of colored organics is obtained for the wastewater, Qs% = 78.6%, Qc% = 64.5% for Fe anode; Qs% = 62.2% , Qc% = 58.0% for Al anode.
    2. Doping Ni(II) to SnO2 electrode can remarkly increase oxidation efficiency of the electrodes. The oxidation efficiency of SnO2 electrode doped 4.0 wt.% Ni(II) is highest in all SnO2 electrodes doped Ni(II). Main factors that influence electrocatalytic oxidation efficiency are charge loading and current density for the SnO2 electrode containing 4.0 wt.% Ni (II).
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