【摘要】 通过静态实验研究了基于铁氧化物表面Fe(Ⅱ)对地下环境中硝基苯的衰减作用.结果表明,在硝基苯浓度为150mg.L-1,Fe(Ⅱ)与硝基苯物质的量比为13.5时,反应60h内,离子态的Fe(Ⅱ)、Fe(Ⅱ)-正方针铁矿、Fe(Ⅱ)-赤铁矿、Fe(Ⅱ)-针铁矿对硝基苯的衰减属于一级反应动力学;Fe(Ⅱ)-正方针铁矿和Fe(Ⅱ)-针铁矿对硝基苯的衰减效果相近,且均比Fe(Ⅱ)-赤铁矿对硝基苯的衰减效果好;Fe(Ⅱ)与硝基苯的物质的量比对硝基苯的衰减也有一定的影响,在硝基苯浓度为150mg.L-1,Fe(Ⅱ)与硝基苯物质的量比为13.5时,对硝基苯的衰减效果相对较好,对硝基苯的去除率均在25.18%以上.更多还原

【Abstract】 The lab-scale experiments were conducted to investigate the reduction of nitrobenzene(NB) by surface-Fe(Ⅱ) based on iron oxides in subsurface environment.The results indicated that,under the condition of Fe(Ⅱ) /NB 13.5 and the nitrobenzene concentration 150 mg · L-1,the reduction of nitrobenzene by Fe(Ⅱ),Fe(Ⅱ)-akaganeite,Fe(Ⅱ)-hematite,Fe(Ⅱ)-goethite can be described as first-order kinetics during the period of 60 reaction hours.No apparent differences were observed in the Fe(Ⅱ)-akaganeite and Fe(Ⅱ)-goethite reduction system,and the NB removal efficiency was higher than that in the Fe(Ⅱ)-hematite system.The Fe(Ⅱ)/NB had a certain effect on the attenuation of nitrobenzene,and the reduction efficiency of nitrobenzene was the highest under the condition of the Fe(Ⅱ)/NB 13.5 and the nitrobenzene concentration 150 mg · L-1.The removal efficiency of nitrobenzene was over 25.18%.更多还原