Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education, School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education, School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
J Environ Sci (China). 2015 Nov 1;37:31-6. doi: 10.1016/j.jes.2015.03.027. Epub 2015 Jul 2.
A new iron-fly ash packing was studied for reductive transformation of p-nitrotoluene. The packing was made of iron, fly ash and kaolin with the mass ratio of 36:7:2. A reactor was designed to investigate the long-term performance of the packing. The results showed that the reduction of p-nitrotoluene increased with decreasing pH, because the reduction potential of reaction increased with the concentration of H(+). The pH was one of the key factors impacting the reductive transformation of p-nitrotoluene. Comparing iron-activated carbon packing with the new iron-fly ash packing, the reduction efficiencies were respectively 76.61% and 75.36% after 20days. The reduction efficiency for both was around 50% at 40days. It was evident that these two kinds of packing had no significant difference in their capability for p-nitrotoluene reductive transformation. Compared with iron-activated carbon, the new iron-fly ash packing had obvious advantages in terms of manufacturing costs and environmental pollution degradation. This study showed that the new iron-fly ash packing had good performance in reductive transformation of nitrotoluene compounds.
一种新型的铁粉煤灰包装被研究用于对 p-硝基甲苯的还原转化。该包装由铁、粉煤灰和高岭土组成，质量比为 36:7:2。设计了一个反应器来研究包装的长期性能。结果表明，随着 pH 值的降低，p-硝基甲苯的还原增加，因为反应的还原电势随着 H(+)浓度的增加而增加。pH 值是影响 p-硝基甲苯还原转化的关键因素之一。将铁活性炭包装与新型铁粉煤灰包装进行比较，20 天后的还原效率分别为 76.61%和 75.36%。40 天后，两者的还原效率均约为 50%。显然，这两种包装在还原转化 p-硝基甲苯方面没有明显的差异。与铁活性炭相比，新型铁粉煤灰包装在制造成本和环境污染降解方面具有明显的优势。本研究表明，新型铁粉煤灰包装在还原转化硝基甲苯化合物方面具有良好的性能。
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