【摘要】 研究常温常压下零价铁(ZVI或Fe0)对土壤中3-硝基甲苯(MNT)的还原作用.结果表明:零价铁能够有效地将土壤中的MNT还原为3-甲基苯胺.在MNT为2.5×10-6mol·g-1,铁粉加入量为25mg·g-1,土壤初始pH值为6.8,含水量为75%,温度为25℃的条件下,反应5h后MNT的还原率可达95%.随着体系反应时间的延长,温度的升高,土壤含水量的增大和铁粉用量的增加,MNT的还原率均增大.将土壤初始pH值控制在偏酸性有利于反应的进行.更多还原

【Abstract】 The reduction of 3-nitrotoluene(MNT)in a soil with zero-valent iron(ZVI or Fe0)under ambient temperature and pressure was investigated.Experimental results indicated that MNT in the soil was effectively reduced to m-methyl-aniline by ZVI.After 5 hours of reaction,the reduction rate of MNT in soil at a concentration of 2.5×10-6mol·g-1 reached as high as 95% when 25mg of Fe0 per gram of soil was added under these soil conditions: 25℃,initial pH 6.8 and water contents 75%.A prolonged reaction time,an elevated temperature,a higher level of soil water contents and a higher dose of ZVI all resulted in an increase in the rate of reduction.The reduction was greatly facilitated by adjusting the initial soil pH to acidic.更多还原