TY - JOUR ID - 457 TI - Determination of Retardation Effect of SOM on Aqueous Leaching of Polycyclic Aromatic Hydrocarbons Using Confocal Laser Scanning Microscope JO - International Journal of Environmental Research JA - IJER LA - en SN - 1735-6865 AU - Zhang, Y. AU - Li, F. AU - Wang, J. AD - Institute of Biological and Chemical Engineering, Jiaxing University, Jiaxing 314001, Zhejiang, China AD - Department of Soil Pollution Control, Chinese Research Academy of Environmental Sciences, Beijing 100012, China Y1 - 2011 PY - 2011 VL - 5 IS - 4 SP - 999 EP - 1008 KW - PAHs KW - BTCs KW - Soil column KW - SOM KW - CLSM DO - 10.22059/ijer.2011.457 N2 - Influence of soil organic matter (SOM) on the adsorption, desorption and transport of polycyclic aromatic hydrocarbons (PAHs) has already been given full investigation in soils. In this paper, confocal laser scanning microscope (CLSM) was used to elucidate aqueous leaching of PAHs in different types of soil with soil columns, which enhanced understanding on transport of PAHs appreciably. Four typical soils in China including fluvo-aquic soil (FAS), aquic brown soil (ABS), red soil (RS) and black soil (BS) were selected in the experiment. Target pollutants of phenanthrene and pyrene were extracted from the leachate by solid phase extraction (SPE) and then determined by high performance liquid chromatography (HPLC). The experimental results showed that the retardation ability of pollutants to the four selected types of soil increased in the order: FAS H” ABS < RS < BS. To better expatiate the dissimilar ability of the PAHs transported in the four typical soils, the retardation factor (R), distribution constant (Kd) and partition coefficient (Koc) were evaluated based on the observed breakthrough curves (BTCs). Furthermore, CLSM was used to visualize the effects of SOM on the transport ability of PAHs in different types of soil. All the results provided vivid understanding with mathematical and especially optical measures that SOM was considered the single most important factor limiting the availability and mobility of PAHs in soil over the duration of the experiment. UR - https://ijer.ut.ac.ir/article_457.html L1 - https://ijer.ut.ac.ir/article_457_23ae3f7001762a465b77f904624e4d29.pdf ER -