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  

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

作　　者：李敬杰[1] 赵勇胜[1] 董军[1] 许超[1] 屈智慧[1] 杨玲[1] 马百文[1] 

机构地区：[1]吉林大学地下水资源与环境教育部重点实验室,长春130021

出　　处：《环境科学学报》2012年第6期1370-1373,共4页Acta Scientiae Circumstantiae

基　　金：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.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（ n ）-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%.

关 键 词：硝基苯 表面Fe(Ⅱ) 铁氧化物 衰减 

分 类 号：X523[环境科学与工程—环境工程]