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.
The reduction of 3-nitrotoluene （MNT）in a soil with zero-valent iron （ZVI or Fe~） 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 Fe^0 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.
出处
《环境化学》
CAS
CSCD
北大核心
2009年第2期173-176,共4页
Environmental Chemistry
基金
广东省自然科学基金(0410627)资助项目
关键词
3-硝基甲苯
零价铁
还原
土壤
3-nitrotoluene, zero-valent iron, reduction, soil.
