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研究报告

李敬杰,赵勇胜,董军,许超,屈智慧,杨玲,马百文.基于铁氧化物的表面Fe(Ⅱ)对地下环境中硝基苯的衰减作用[J].环境科学学报,2012,32(6):1370-1373

Nitrobenzene attenuation process in subsurface environment by surface-Fe(Ⅱ) based on iron oxides

基金项目：国家高技术研究发展计划项目(No.2008AA06A410); 国家水体污染控制与治理科技重大专项(No.2008ZX07207-007-05);吉林大学基本科研业务费资助(No. 200903157); 吉林省青年科研基金项目(No. 201101023)

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150 mg·L^-1,Fe (Ⅱ)与硝基苯物质的量比为13.5时,反应60 h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150 mg·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.

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%.