[Sorption behavior of phenanthrene to natural carbonaceous sediments].
Natural sediments impacted by previous coal mining activities were collected and separated according to grain size and density. Sorption experiments were performed with original sediments and different sub-fractions. Abundant coal and other coal-derived particles were identified using organic spectrographic analysis. Both Freundlich and partitioning and pore-filling model were applied to fit the experimental data. All sorption isotherms showed non-linear sorption properties, with n in the range of 0.72-0.76. The light fraction had the highest sorption capacity (lgK(Fr) = 4.03), which is comparable to that of raw coal. In addition, partitioning and pore-filling model yields the better fitting than Freundlich model, indicating that at low c(w), "pore-filling" dominants the whole sorption; while with the increase of c(w), partition takes place of adsorption and dominants the sorption. In addition, in spite of the very low mass weight, the light fraction dominated by carbonaceous materials contributed more than 60% of the sorption for the whole sediments.
Key laboratory of Geographic Information of the Ministry of Education, School of Resource and Environmental Sciences, East China Normal University, Shanghai 200062, China. yiyang.ecnu@gmail.com
Yi
Y
Yang
Min
M
Liu
Zhen-Lou
ZL
Chen
Shi-Yuan
SY
Xu
D000327:Adsorption; D019015:Geologic Sediments / Q000737:chemistry*; D008962:Models, Theoretical; D010616:Phenanthrenes / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry*
D010616:Phenanthrenes; D014874:Water Pollutants, Chemical; C031181:phenanthrene