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首页> 外文会议>1998 Joint Conference on the Environment, 1998, Mar 31-Apr 1, 1998, Albuquerque, NM >Reduction of Dissolved Perchloroethylene by Pelletized Zero Valent Iron/Surfactant-Modified Zeolite
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Reduction of Dissolved Perchloroethylene by Pelletized Zero Valent Iron/Surfactant-Modified Zeolite

机译：粒化零价铁/表面活性剂改性沸石减少溶解的四氯乙烯

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In testing the new Fe/SMZ for it's ability to reductively dechlorinate PCE, it has been established that the pellet enhances PCE removal by a factor 2-3 over a raw zero valent iron powder or untreated Fe/zeolite pellets. TCE levels were found to be consistently higher in the Fe/SMZ than in the Fe/zeolite. Raw zero valent iron powder also has a small capacity to sorb HDTMA to its surface and then subsequently reduce PCE through the same reductive process. The Fe/zeolite has a sorption capacity of about 80 mmol/kg while the iron powder only displays a capacity of about 4 mmol/kg. However, the modified iron's ability to reduce PCE was increased by a factor of 3 after being surfactant-modified, and the TCE production was increased by an order of magnitude. Based on the above results, it appears that Fe/SMZ is a promising new material to be utilized in in situ groundwater remediation. Fe/SMZ may require significantly less barrier material to remediate the same amount of contamination than if a mere retardation or degradative type of material were used.
机译：在测试新型Fe / SMZ还原PCE的能力时，已确定该颗粒比零价铁粉或未经处理的Fe /沸石颗粒将PCE去除率提高2-3倍。发现Fe / SMZ中的TCE含量始终高于Fe /沸石中的TCE含量。原始的零价铁粉还具有将HDTMA吸附到其表面，然后通过相同的还原过程还原PCE的能力。 Fe /沸石具有约80mmol / kg的吸附容量，而铁粉仅显示约4mmol / kg的容量。然而，在表面活性剂改性后，改性铁还原PCE的能力提高了3倍，并且TCE产量提高了一个数量级。基于上述结果，看来Fe / SMZ是一种有望用于原位地下水修复的新材料。与仅使用阻滞或降解类型的材料相比，Fe / SMZ所需的阻隔材料来补救相同数量的污染物可能要少得多。

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