【摘要】 结合实际TNT废水的水质状况,以Cu(Ⅱ)、Mn(Ⅱ)、Fe(Ⅱ)、Fe(Ⅲ)及Al(Ⅲ)等为代表,以TNT去除率及反应动力学常数为评价指标,实验研究了金属离子对O3/H2O2降解TNT功效的影响。结果表明,金属离子对O3/H2O2去除TNT功效受控于金属的种类及浓度:Cu(Ⅱ)具有抑制作用;Mn(Ⅱ)浓度较低时,具有促进作用,浓度较高时则具有抑制作用;Fe(Ⅱ)与Fe(Ⅲ)浓度较低时,具有抑制作用,浓度较高时则具有促进作用;Al(Ⅲ)具有微弱的促进作用。分析认为,尽管Cu(Ⅱ)、Fe(Ⅱ)、Fe(Ⅲ)及Mn(Ⅱ)等都对去除TNT产生抑制作用,但前三者主要影响.OH的形成,而后者则影响.OH的寿命。更多还原

【Abstract】 The metals ions of wastewater including Cu(Ⅱ),Mn(Ⅱ),Fe(Ⅱ),Fe(Ⅲ) and Al(Ⅲ) were selected as representatives,and the experiments were carried out to assess the effects of metal ions on TNT-removal by O3/H2O2 in the wastewater.The experimental results showed that effects of metal ion on the TNT degradation with O3/H2O2 depend on the metal types and their concentrations in the wastewater.Cu2+ suppresses the degradation.Mn2+with a low concentration enhances the degradation,but suppresses the degradation with high concentration.The effects of Fe2+ and Fe3+ are opposite to that of Mn2+,and they enhance the degradation with low concentration and inhibit it with high concentration.Al3+ has a small potential to improve the degradation.Cu(Ⅱ),Fe(Ⅱ),Fe(Ⅲ) inhibit the TNT-degradation by O3/H2O2 by blocking forming of hydroxyl radicals,and Mn(Ⅱ) does that by shorting the hydroxyl radical age.更多还原