【摘要】 构建了以海水为溶剂的过硫酸钠（Na₂S₂O₈）/尿素复合氧化还原脱除体系，采用鼓泡反应器，在不同氯离子（Cl^-）摩尔浓度（0～0.6 mol/L）、碳酸氢根离子（HCO₃^-）摩尔浓度（0～0.05 mol/L）、反应温度（30～70℃）、Na₂S₂O₈摩尔浓度（0.01～0.20 mol/L）及尿素摩尔浓度（0.1～2.0 mol/L）条件下开展了船舶柴油机脱除SO₂和NO的试验．结果表明：Cl^-和HCO₃^-的存在能够有效强化NO的吸收；反应温度、Na₂S₂O₈摩尔浓度和尿素摩尔浓度的增大均能有效促进NO的脱除；海水及尿素的使用都能降低SO₂的竞争作用、提升NO脱除效率；NO初始体积分数增加会抑制NO的吸收．尿素的加入能有效抑制溶液中硝酸盐的生成，尿素摩尔浓度为2.0 mol/L时可以使反应后的硝酸盐质量浓度从25.687 mg/L降至15.158 mg/L.Na₂S₂O₈/尿素/海水复合氧化还原脱除体系既有NO脱除的高效性，还能有效解决洗涤废水中硝酸盐含量偏高的问题．更多还原

【Abstract】 A sodium persulfate（Na₂S₂O₈）/urea composite redox removal system using seawater as the solvent was constructed,and a bubbling reactor was constructed.A bubble reactor was used to carry out experimental research on the removal of SO₂ and NO from marine diesel engine exhaust under different Cl^-mole concentrations（0—0.6 mol/L）,HCO₃^-mole concentrations（0—0.05 mol/L）,reaction temperatures（30—70℃），Na₂S₂O₈ mole concentrations（0.01—0.20 mol/L）,and urea mole concentrations（0.1—2.0 mol/L）.The results show that the presence of Cl^-and HCO₃^-can effectively strengthen the absorption of NO,the increase of the reaction temperature,Na₂S₂O₈ mole concentration,and urea mole concentration can effectively promote the removal of NO,the use of seawater and urea can reduce the competitive role of SO₂ and improve the NO removal efficiency,the increase of the initial volume fraction of NO can inhibit the absorption of NO.The addition of urea can effectively inhibit the generation of nitrate in the solution,and the urea mole concentration of 2.0 mol/L can increase the nitrate mass concentration from 25.687 mg/L to 15.158 mg/L.The Na₂S₂O₈/urea/seawater composite redox removal system not only has a good NO removal ability,but also effectively solves the problem of high nitrate content in washing wastewater.更多还原