Abstract：Batch and column experiments were conducted to discuss the stability of NZVI in three vehicles, such as water, sodium dodecyl sulfate (SDS) solution and SDS foam, and the transport properties in three diameter sands (0.25~0.5mm, 0.5~0.9mm, 0.9~1.4mm) within the three vehicles. Three main results were obtained in this work. First, for bare NZVI suspension, the effluent rate of NZVI from column were 20.9%,17.4% and 6.5% for 0.9~1.4mm, 0.5~0.9mm and 0.25~0.5mm diameter sands, respectively. Moreover, the spatial distribution of NZVI particles in porous media met the following order: 0.9~1.4mm>0.5~0.9mm>0.25~0.5mm. For SDS-NZVI suspension, the delivery ability were more enhanced in 0.9~1.4mm, 0.5~0.9mm than that in 0.25~0.5mm diameter sand. The spatial distribution of NZVI particles in porous media met the following order: 0.5~0.9mm >0.9~1.4mm>0.25~0.5mm. For NZVI-laden foam, the mobility of NZVI in porous media was enhanced in 0.5~0.9mm and 0.25~0.5mm diameter sands compared with that of NZVI suspension and SDS-NZVI suspension. The spatial distribution of NZVI particles in 0.5~0.9mm diameter sand was the best, followed by 0.25~0.5mm and 0.9~1.4m diameter sands. Finally, the results showed that the migration of NZVI in porous media was accelerated by SDS solution and SDS foam compared to water. Besides, the acceleration of transport of NZVI carried by SDS solution was relatively obvious in 0.9~1.4mm diameter sand, while the acceleration of transport of NZVI carried by SDS foam was greater than that by SDS solution in 0.25~0.5mm diameter sand.
苏燕, 赵勇胜, 梁秀春, 李璐璐, 秦传玉. 不同载体携带纳米零价铁在多孔介质中的迁移特性[J]. 中国环境科学, 2015, 35(1): 129-138.
SU Yan, ZHAO Yong-Sheng, LIANG Xiu-Chun, LI Lu-Lu, QIN Chuan-Yu. Transport characteristics of nanoscale zero valent iron carried by three different vehicles in porous media. CHINA ENVIRONMENTAL SCIENCECE, 2015, 35(1): 129-138.
